EXHIBIT 99.1

CARDIOVASCULAR DYNAMICS, INC.
1996 STOCK OPTION/STOCK ISSUANCE PLAN

ARTICLE ONE

GENERAL PROVISIONS

I. PURPOSE OF THE PLAN

This 1996 Stock Option/Stock Issuance Plan is intended to promote the interests of CardioVascular Dynamics, Inc., a Delaware corporation, by providing eligible persons with the opportunity to acquire a proprietary interest, or otherwise increase their proprietary interest, in the Corporation as an incentive for them to remain in the service of the Corporation.

Capitalized terms shall have the meanings assigned to such terms in the attached Appendix.

II. STRUCTURE OF THE PLAN

A. The Plan shall be divided into three separate equity programs:

(i) the Discretionary Option Grant Program under which eligible persons may, at the discretion of the Plan Administrator, be granted options to purchase shares of Common Stock,

(ii) the Stock Issuance Program under which eligible persons may, at the discretion of the Plan Administrator, be issued shares of Common Stock directly, either through the immediate purchase of such shares or as a bonus for services rendered the Corporation (or any Parent or Subsidiary), and

(iii) the Automatic Option Grant Program under which eligible non-employee Board members shall automatically receive option grants at periodic intervals to purchase shares of Common Stock.

B. The provisions of Articles One and Five shall apply to all equity programs under the Plan and shall accordingly govern the interests of all persons under the Plan.

III. ADMINISTRATION OF THE PLAN

A. Prior to the Section 12(g) Registration Date, the Discretionary Option Grant and Stock Issuance Programs shall be administered by the Board. Beginning with the Section 12(g) Registration Date, the Primary Committee shall have sole and exclusive authority to administer the Discretionary Option Grant and Stock Issuance Programs with respect to Section 16 Insiders. No non-employee Board member shall be eligible to serve on the Primary Committee if such individual has, during the twelve (12)-month period immediately preceding the date of his or her appointment to the Primary Committee or (if shorter) the period commencing with the Section 12(g) Registration Date and ending with the date of his or her appointment to the Primary Committee, received an option grant or direct stock issuance under the Plan or any other stock option, stock appreciation, stock bonus or other stock plan of the Corporation (or any Parent or Subsidiary), other than pursuant to the Automatic Option Grant Program.

B. Administration of the Discretionary Option Grant and Stock Issuance Programs with respect to all other persons eligible to participate in those programs may, at the Board's discretion, be vested in the Primary Committee or a Secondary Committee, or the Board may retain the power to administer those programs with respect to all such persons. The members of the Secondary Committee may be Board members who are Employees eligible to receive discretionary option grants or direct stock issuances under the Plan or any other stock option, stock appreciation, stock bonus or other stock plan of the Corporation (or any Parent or Subsidiary).

C. Members of the Primary Committee or any Secondary Committee shall serve for such period of time as the Board may determine and may be removed by the Board at any time. The Board may also at any time terminate the functions of any Secondary Committee and reassume all powers and authority previously delegated to such committee.

D. Each Plan Administrator shall, within the scope of its administrative functions under the Plan, have full power and authority to establish such rules and regulations as it may deem appropriate for proper administration of the Discretionary Option Grant and Stock Issuance Programs and to make such determinations under, and issue such interpretations of, the provisions of such programs and any outstanding options or stock issuances thereunder as it may deem necessary or advisable. Decisions of the Plan Administrator within the scope of its administrative functions under the Plan shall be final and binding on all parties who have an interest in the Discretionary Option Grant or Stock Issuance Program under its jurisdiction or any option or stock issuance thereunder.

E. Service on the Primary Committee or the Secondary Committee shall constitute service as a Board member, and members of each such committee shall accordingly be entitled to full indemnification and reimbursement as Board members for their service on such committee. No member of the Primary Committee or the Secondary

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Committee shall be liable for any act or omission made in good faith with respect to the Plan or any option grants or stock issuances under the Plan.

F. Administration of the Automatic Option Grant Program shall be self-executing in accordance with the terms of that program, and no Plan Administrator shall exercise any discretionary functions with respect to option grants or stock issuances made thereunder.

IV. ELIGIBILITY

A. The persons eligible to participate in the Discretionary Option Grant and Stock Issuance Programs are as follows:

(i) Employees,

(ii) non-employee members of the Board (other than those serving as members of the Primary Committee) or the board of directors of any Parent or Subsidiary, and

(iii) consultants and other independent advisors who provide services to the Corporation (or any Parent or Subsidiary).

B. Each Plan Administrator shall, within the scope of its administrative jurisdiction under the Plan, have full authority (subject to the provisions of the Plan) to determine, (i) with respect to the option grants under the Discretionary Option Grant Program, which eligible persons are to receive option grants, the time or times when such option grants are to be made, the number of shares to be covered by each such grant, the status of the granted option as either an Incentive Option or a Non-Statutory Option, the time or times at which each option is to become exercisable, the vesting schedule (if any) applicable to the option shares and the maximum term for which the option is to remain outstanding and (ii) with respect to stock issuances under the Stock Issuance Program, which eligible persons are to receive stock issuances, the time or times when such issuances are to be made, the number of shares to be issued to each Participant, the vesting schedule (if any) applicable to the issued shares and the consideration to be paid for such shares.

C. The Plan Administrator shall have the absolute discretion either to grant options in accordance with the Discretionary Option Grant Program or to effect stock issuances in accordance with the Stock Issuance Program.

D. The individuals eligible to participate in the Automatic Option Grant Program shall be limited to (i) those individuals who are servings as non-employee Board members on the Underwriting Date, (ii) those individuals who first become non-employee Board members after the Underwriting Date, whether through appointment by the Board or election by the Corporation's stockholders, and (iii) those individuals who are to continue

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to serve as non-employee Board members after one or more Annual Stockholders Meetings held after the Underwriting Date. A non-employee Board member who has previously been in the employ of the Corporation (or any Parent or Subsidiary) shall not be eligible to receive an initial option grant under the Automatic Option Grant Program on the Underwriting Date or (if later) at the time he or she first becomes a non-employee Board member, but such individual shall be eligible to receive periodic option grants under the Automatic Option Grant Program upon his or her continued service as a non-employee Board member after one or more Annual Stockholders Meetings.

V. STOCK SUBJECT TO THE PLAN

A. The stock issuable under the Plan shall be shares of authorized but unissued or reacquired Common Stock, including shares repurchased by the Corporation on the open market. The maximum number of shares of Common Stock which may be issued over the term of the Plan shall not exceed 1,200,000 shares. Such authorized share reserve is comprised of the number of shares which remain available for issuance, as of the Plan Effective Date, under the Predecessor Plan as last approved by the Corporation's stockholders, including the shares subject to the outstanding options to be incorporated into the Plan.

B. No one person participating in the Plan may receive options, separately exercisable stock appreciation rights and direct stock issuances for more than 800,000 shares of Common Stock in the aggregate over the term of the Plan.

C. Shares of Common Stock subject to outstanding options (including any options incorporated from the Predecessor Plan) shall be available for subsequent issuance under the Plan to the extent (i) those options expire or terminate for any reason prior to exercise in full or (ii) those options are cancelled in accordance with the cancellation-regrant provisions of Article Two. All shares issued under the Plan (including shares issued upon exercise of options incorporated from the Predecessor Plan), whether or not those shares are subsequently repurchased by the Corporation pursuant to its repurchase rights under the Plan, shall reduce on a share-for-share basis the number of shares of Common Stock available for subsequent issuance under the Plan. In addition, should the exercise price of an option under the Plan (including any option incorporated from the Predecessor Plan) be paid with shares of Common Stock or should shares of Common Stock otherwise issuable under the Plan be withheld by the Corporation in satisfaction of the withholding taxes incurred in connection with the exercise of an option or the vesting of a stock issuance under the Plan, then the number of shares of Common Stock available for issuance under the Plan shall be reduced by the gross number of shares for which the option is exercised or which vest under the stock issuance, and not by the net number of shares of Common Stock issued to the holder of such option or stock issuance.

D. Should any change be made to the Common Stock by reason of any stock split, stock dividend, recapitalization, combination of shares, exchange of shares or

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other change affecting the outstanding Common Stock as a class without the Corporation's receipt of consideration, appropriate adjustments shall be made to
(i) the maximum number and/or class of securities issuable under the Plan, (ii) the number and/or class of securities for which any one person may be granted options, separately exercisable stock appreciation rights and direct stock issuances in the aggregate under the Plan, (iii) the number and/or class of securities for which automatic option grants are to be made subsequently per Eligible Director under the Automatic Option Grant Program and (iv) the number and/or class of securities and the exercise price per share in effect under each outstanding option (including any option incorporated from the Predecessor Plan). Such adjustments to the outstanding options are to be effected in a manner which shall preclude the dilution or enlargement of benefits under such options. The adjustments determined by the Plan Administrator shall be final, binding and conclusive.

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ARTICLE TWO

DISCRETIONARY OPTION GRANT PROGRAM

I. OPTION TERMS

Each option shall be evidenced by one or more documents in the form approved by the Plan Administrator; provided, however, that each such document shall comply with the terms specified below. Each document evidencing an Incentive Option shall, in addition, be subject to the provisions of the Plan applicable to such options.

A. Exercise Price.

1. The exercise price per share shall be fixed by the Plan Administrator but shall not be less than eighty-five percent (85%) of the Fair Market Value per share of Common Stock on the option grant date.

2. The exercise price shall become immediately due upon exercise of the option and shall, subject to the provisions of Section I of Article Five and the documents evidencing the option, be payable in one or more of the forms specified below:

(i) cash or check made payable to the Corporation,

(ii) shares of Common Stock held for the requisite period necessary to avoid a charge to the Corporation's earnings for financial reporting purposes and valued at Fair Market Value on the Exercise Date, or

(iii) to the extent the option is exercised for vested shares, through a special sale and remittance procedure pursuant to which the Optionee shall concurrently provide irrevocable written instructions to
(a) a Corporation-designated brokerage firm to effect the immediate sale of the purchased shares and remit to the Corporation, out of the sale proceeds available on the settlement date, sufficient funds to cover the aggregate exercise price payable for the purchased shares plus all applicable Federal, state and local income and employment taxes required to be withheld by the Corporation by reason of such exercise and (b) the Corporation to deliver the certificates for the purchased shares directly to such brokerage firm in order to complete the sale.

Except to the extent such sale and remittance procedure is utilized, payment of the exercise price for the purchased shares must be made on the Exercise Date.

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B. Exercise and Term of Options.

Each option shall be exercisable at such time or times, during such period and for such number of shares as shall be determined by the Plan Administrator and set forth in the documents evidencing the option. However, no option shall have a term in excess of ten (10) years measured from the option grant date.

C. Effect of Termination of Service.

1. The following provisions shall govern the exercise of any options held by the Optionee at the time of cessation of Service or death:

(i) Any option outstanding at the time of the Optionee's cessation of Service for any reason shall remain exercisable for such period of time thereafter as shall be determined by the Plan Administrator and set forth in the documents evidencing the option, but no such option shall be exercisable after the expiration of the option term.

(ii) Any option exercisable in whole or in part by the Optionee at the time of death may be exercised subsequently by the personal representative of the Optionee's estate or by the person or persons to whom the option is transferred pursuant to the Optionee's will or in accordance with the laws of descent and distribution.

(iii) During the applicable post-Service exercise period, the option may not be exercised in the aggregate for more than the number of vested shares for which the option is exercisable on the date of the Optionee's cessation of Service. Upon the expiration of the applicable exercise period or (if earlier) upon the expiration of the option term, the option shall terminate and cease to be outstanding for any vested shares for which the option has not been exercised. However, the option shall, immediately upon the Optionee's cessation of Service, terminate and cease to be outstanding to the extent the option is not otherwise at that time exercisable for vested shares.

(iv) Should the Optionee's Service be terminated for Misconduct, then all outstanding options held by the Optionee shall terminate immediately and cease to be outstanding.

(v) In the event of an Involuntary Termination following a Corporate Transaction, the provisions of Section III of this Article Two shall govern the period for which the outstanding options are to remain exercisable following the Optionee's cessation of Service and shall supersede any provisions to the contrary in this section.

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2. The Plan Administrator shall have the discretion, exercisable either at the time an option is granted or at any time while the option remains outstanding, to:

(i) extend the period of time for which the option is to remain exercisable following the Optionee's cessation of Service from the period otherwise in effect for that option to such greater period of time as the Plan Administrator shall deem appropriate, but in no event beyond the expiration of the option term, and/or

(ii) permit the option to be exercised, during the applicable post-Service exercise period, not only with respect to the number of vested shares of Common Stock for which such option is exercisable at the time of the Optionee's cessation of Service but also with respect to one or more additional installments in which the Optionee would have vested under the option had the Optionee continued in Service.

D. Stockholder Rights. The holder of an option shall have no stockholder rights with respect to the shares subject to the option until such person shall have exercised the option, paid the exercise price and become a holder of record of the purchased shares.

E. Repurchase Rights. The Plan Administrator shall have the discretion to grant options which are exercisable for unvested shares of Common Stock. Should the Optionee cease Service while holding such unvested shares, the Corporation shall have the right to repurchase, at the exercise price paid per share, any or all of those unvested shares. The terms upon which such repurchase right shall be exercisable (including the period and procedure for exercise and the appropriate vesting schedule for the purchased shares) shall be established by the Plan Administrator and set forth in the document evidencing such repurchase right.

F. Limited Transferability of Options. During the lifetime of the Optionee, the option shall be exercisable only by the Optionee and shall not be assignable or transferable other than by will or by the laws of descent and distribution following the Optionee's death. However, a Non-Statutory Option may be assigned in whole or in part during the Optionee's lifetime in accordance with the terms of a Qualified Domestic Relations Order. The assigned portion may only be exercised by the person or persons who acquire a proprietary interest in the option pursuant to such Qualified Domestic Relations Order. The terms applicable to the assigned portion shall be the same as those in effect for the option immediately prior to such assignment and shall be set forth in such documents issued to the assignee as the Plan Administrator may deem appropriate.

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II. INCENTIVE OPTIONS

The terms specified below shall be applicable to all Incentive Options. Except as modified by the provisions of this Section II, all the provisions of Articles One, Two and Five shall be applicable to Incentive Options. Options which are specifically designated as Non-Statutory Options when issued under the Plan shall not be subject to the terms of this Section II.

A. Eligibility. Incentive Options may only be granted to Employees.

B. Exercise Price. The exercise price per share shall not be less than one hundred percent (100%) of the Fair Market Value per share of Common Stock on the option grant date.

C. Dollar Limitation. The aggregate Fair Market Value of the shares of Common Stock (determined as of the respective date or dates of grant) for which one or more options granted to any Employee under the Plan (or any other option plan of the Corporation or any Parent or Subsidiary) may for the first time become exercisable as Incentive Options during any one (1) calendar year shall not exceed the sum of One Hundred Thousand Dollars ($100,000). To the extent the Employee holds two (2) or more such options which become exercisable for the first time in the same calendar year, the foregoing limitation on the exercisability of such options as Incentive Options shall be applied on the basis of the order in which such options are granted.

D. 10% Stockholder. If any Employee to whom an Incentive Option is granted is a 10% Stockholder, then the exercise price per share shall not be less than one hundred ten percent (110%) of the Fair Market Value per share of Common Stock on the option grant date, and the option term shall not exceed five
(5) years measured from the option grant date.

III. CORPORATE TRANSACTION/CHANGE IN CONTROL

A. In the event of any Corporate Transaction, each outstanding option shall automatically accelerate so that each such option shall, immediately prior to the effective date of the Corporate Transaction, become fully exercisable for all of the shares of Common Stock at the time subject to such option and may be exercised for any or all of those shares as fully- vested shares of Common Stock. However, an outstanding option shall not so accelerate if and to the extent: (i) such option is, in connection with the Corporate Transaction, either to be assumed by the successor corporation (or parent thereof) or to be replaced with a comparable option to purchase shares of the capital stock of the successor corporation (or parent thereof), (ii) such option is to be replaced with a cash incentive program of the successor corporation which preserves the spread existing on the unvested option shares at the time of the Corporate Transaction and provides for subsequent payout in accordance with the same vesting schedule applicable to such option or (iii) the

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acceleration of such option is subject to other limitations imposed by the Plan Administrator at the time of the option grant. The determination of option comparability under clause (i) above shall be made by the Plan Administrator, and its determination shall be final, binding and conclusive.

B. All outstanding repurchase rights shall also terminate automatically, and the shares of Common Stock subject to those terminated rights shall immediately vest in full, in the event of any Corporate Transaction, except to the extent: (i) those repurchase rights are to be assigned to the successor corporation (or parent thereof) in connection with such Corporate Transaction or (ii) such accelerated vesting is precluded by other limitations imposed by the Plan Administrator at the time the repurchase right is issued.

C. The Plan Administrator shall have the discretion, exercisable either at the time the option is granted or at any time while the option remains outstanding, to provide for the automatic acceleration of one or more outstanding options (and the automatic termination of one or more outstanding repurchase rights with the immediate vesting of the shares of Common Stock subject to those rights) upon the occurrence of a Corporate Transaction, whether or not those options are to be assumed or replaced (or those repurchase rights are to be assigned) in the Corporate Transaction. The Plan Administrator shall also have the discretion to grant options which do not accelerate whether or not such options are assumed (and to provide for repurchase rights that do not terminate whether or not such rights are assigned) in connection with a Corporate Transaction.

D. Immediately following the consummation of the Corporate Transaction, all outstanding options shall terminate and cease to be outstanding, except to the extent assumed by the successor corporation (or parent thereof).

E. Each option which is assumed in connection with a Corporate Transaction shall be appropriately adjusted, immediately after such Corporate Transaction, to apply to the number and class of securities which would have been issuable to the Optionee in consummation of such Corporate Transaction had the option been exercised immediately prior to such Corporate Transaction. Appropriate adjustments to reflect such Corporate Transaction shall also be made to (i) the number and/or class of securities available for issuance under the Plan following the consummation of such Corporate Transaction, (ii) the exercise price payable per share under each outstanding option, provided the aggregate exercise price payable for such securities shall remain the same and (iii) the maximum number of securities and/or class of securities for which any one person may be granted stock options, separately exercisable stock appreciation rights and direct stock issuances in the aggregate under the Plan.

F. The Plan Administrator shall have full power and authority to grant options under the Discretionary Option Grant Program which will automatically accelerate in the event the Optionee's Service subsequently terminates by reason of an Involuntary

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Termination within a designated period (not to exceed eighteen (18) months) following the effective date of any Corporate Transaction in which those options are assumed or replaced and do not otherwise accelerate. Any options so accelerated shall remain exercisable for fully-vested shares until the earlier of (i) the expiration of the option term or (ii) the expiration of the one
(1)-year period measured from the effective date of the Involuntary Termination. In addition, the Plan Administrator may provide that one or more of the Corporation's outstanding repurchase rights with respect to shares held by the Optionee at the time of such Involuntary Termination shall immediately terminate, and the shares subject to those terminated repurchase rights shall accordingly vest in full.

G. The Plan Administrator shall have full power and authority to grant options under the Discretionary Option Grant Program which will automatically accelerate in the event the Optionee's Service subsequently terminates by reason of an Involuntary Termination within a designated period (not to exceed eighteen (18) months) following the effective date of any Change in Control. Each option so accelerated shall remain exercisable for fully-vested shares until the earlier of (i) the expiration of the option term or (ii) the expiration of the one (1)-year period measured from the effective date of the Involuntary Termination. In addition, the Plan Administrator may provide that one or more of the Corporation's outstanding repurchase rights with respect to shares held by the Optionee at the time of such Involuntary Termination shall immediately terminate, and the shares subject to those terminated repurchase rights shall accordingly vest in full.

H. The portion of any Incentive Option accelerated in connection with a Corporate Transaction or Change in Control shall remain exercisable as an Incentive Option only to the extent the applicable One Hundred Thousand Dollar ($100,000) limitation is not exceeded. To the extent such dollar limitation is exceeded, the accelerated portion of such option shall be exercisable as a Non-Statutory Option under the Federal tax laws.

I. The grant of options under the Discretionary Option Grant Program shall in no way affect the right of the Corporation to adjust, reclassify, reorganize or otherwise change its capital or business structure or to merge, consolidate, dissolve, liquidate or sell or transfer all or any part of its business or assets.

IV. CANCELLATION AND REGRANT OF OPTIONS

The Plan Administrator shall have the authority to effect, at any time and from time to time, with the consent of the affected option holders, the cancellation of any or all outstanding options under the Discretionary Option Grant Program (including outstanding options incorporated from the Predecessor Plan) and to grant in substitution new options covering the same or different number of shares of Common Stock but with an exercise price per share based on the Fair Market Value per share of Common Stock on the new grant date.

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V. STOCK APPRECIATION RIGHTS

A. The Plan Administrator shall have full power and authority to grant to selected Optionees tandem stock appreciation rights and/or limited stock appreciation rights.

B. The following terms shall govern the grant and exercise of tandem stock appreciation rights:

(i) One or more Optionees may be granted the right, exercisable upon such terms as the Plan Administrator may establish, to elect between the exercise of the underlying option for shares of Common Stock and the surrender of that option in exchange for a distribution from the Corporation in an amount equal to the excess of (a) the Fair Market Value (on the option surrender date) of the number of shares in which the Optionee is at the time vested under the surrendered option (or surrendered portion thereof) over (b) the aggregate exercise price payable for such shares.

(ii) No such option surrender shall be effective unless it is approved by the Plan Administrator. If the surrender is so approved, then the distribution to which the Optionee shall be entitled may be made in shares of Common Stock valued at Fair Market Value on the option surrender date, in cash, or partly in shares and partly in cash, as the Plan Administrator shall in its sole discretion deem appropriate.

(iii) If the surrender of an option is rejected by the Plan Administrator, then the Optionee shall retain whatever rights the Optionee had under the surrendered option (or surrendered portion thereof) on the option surrender date and may exercise such rights at any time prior to the later of (a) five (5) business days after the receipt of the rejection notice or (b) the last day on which the option is otherwise exercisable in accordance with the terms of the documents evidencing such option, but in no event may such rights be exercised more than ten (10) years after the option grant date.

C. The following terms shall govern the grant and exercise of limited stock appreciation rights:

(i) One or more Section 16 Insiders may be granted limited stock appreciation rights with respect to their outstanding options.

(ii) Upon the occurrence of a Hostile Take-Over, each such individual holding one or more options with such a limited stock appreciation right in effect for at least six (6) months shall have the

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unconditional right (exercisable for a thirty (30)-day period following such Hostile Take-Over) to surrender each such option to the Corporation, to the extent the option is at the time exercisable for vested shares of Common Stock. In return for the surrendered option, the Optionee shall receive a cash distribution from the Corporation in an amount equal to the excess of (a) the Take-Over Price of the shares of Common Stock which are at the time vested under each surrendered option (or surrendered portion thereof) over (b) the aggregate exercise price payable for such shares. Such cash distribution shall be paid within five (5) days following the option surrender date.

(iii) Neither the approval of the Plan Administrator nor the consent of the Board shall be required in connection with such option surrender and cash distribution.

(iv) The balance of the option (if any) shall continue in full force and effect in accordance with the documents evidencing such option.

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ARTICLE THREE

STOCK ISSUANCE PROGRAM

I. STOCK ISSUANCE TERMS

Shares of Common Stock may be issued under the Stock Issuance Program through direct and immediate issuances without any intervening option grants. Each such stock issuance shall be evidenced by a Stock Issuance Agreement which complies with the terms specified below.

A. Purchase Price.

1. The purchase price per share shall be fixed by the Plan Administrator, but shall not be less than eighty-five percent (85%) of the Fair Market Value per share of Common Stock on the issuance date.

2. Subject to the provisions of Section I of Article Five, shares of Common Stock may be issued under the Stock Issuance Program for any of the following items of consideration which the Plan Administrator may deem appropriate in each individual instance:

(i) cash or check made payable to the Corporation, or

(ii) past services rendered to the Corporation (or any Parent or Subsidiary).

B. Vesting Provisions.

1. Shares of Common Stock issued under the Stock Issuance Program may, in the discretion of the Plan Administrator, be fully and immediately vested upon issuance or may vest in one or more installments over the Participant's period of Service or upon attainment of specified performance objectives. The elements of the vesting schedule applicable to any unvested shares of Common Stock issued under the Stock Issuance Program, namely:

(i) the Service period to be completed by the Participant or the performance objectives to be attained,

(ii) the number of installments in which the shares are to vest,

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(iii) the interval or intervals (if any) which are to lapse between installments, and

(iv) the effect which death, Permanent Disability or other event designated by the Plan Administrator is to have upon the vesting schedule,

shall be determined by the Plan Administrator and incorporated into the Stock Issuance Agreement.

2. Any new, substituted or additional securities or other property (including money paid other than as a regular cash dividend) which the Participant may have the right to receive with respect to the Participant's unvested shares of Common Stock by reason of any stock dividend, stock split, recapitalization, combination of shares, exchange of shares or other change affecting the outstanding Common Stock as a class without the Corporation's receipt of consideration shall be issued subject to (i) the same vesting requirements applicable to the Participant's unvested shares of Common Stock and
(ii) such escrow arrangements as the Plan Administrator shall deem appropriate.

3. The Participant shall have full stockholder rights with respect to any shares of Common Stock issued to the Participant under the Stock Issuance Program, whether or not the Participant's interest in those shares is vested. Accordingly, the Participant shall have the right to vote such shares and to receive any regular cash dividends paid on such shares.

4. Should the Participant cease to remain in Service while holding one or more unvested shares of Common Stock issued under the Stock Issuance Program or should the performance objectives not be attained with respect to one or more such unvested shares of Common Stock, then those shares shall be immediately surrendered to the Corporation for cancellation, and the Participant shall have no further stockholder rights with respect to those shares. To the extent the surrendered shares were previously issued to the Participant for consideration paid in cash or cash equivalent (including the Participant's purchase-money indebtedness), the Corporation shall repay to the Participant the cash consideration paid for the surrendered shares and shall cancel the unpaid principal balance of any outstanding purchase-money note of the Participant attributable to the surrendered shares.

5. The Plan Administrator may in its discretion waive the surrender and cancellation of one or more unvested shares of Common Stock (or other assets attributable thereto) which would otherwise occur upon the cessation of the Participant's Service or the non-attainment of the performance objectives applicable to those shares. Such waiver shall result in the immediate vesting of the Participant's interest in the shares of Common Stock as to which the waiver applies. Such waiver may be effected at any time,

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whether before or after the Participant's cessation of Service or the attainment or non-attainment of the applicable performance objectives.

II. CORPORATE TRANSACTION/CHANGE IN CONTROL

A. All outstanding cancellation rights under the Stock Issuance Program shall terminate automatically, and all the shares of Common Stock subject to those terminated rights shall immediately vest in full, in the event of any Corporate Transaction, except to the extent (i) those cancellation rights are assigned to the successor corporation (or parent thereof) in connection with such Corporate Transaction or (ii) such accelerated vesting is precluded by other limitations imposed in the Stock Issuance Agreement.

B. The Plan Administrator shall have the discretionary authority, exercisable either at the time the unvested shares are issued or any time while the Corporation's cancellation rights remain outstanding under the Stock Issuance Program, to provide that those rights shall automatically terminate in whole or in part, and the shares of Common Stock subject to those terminated rights shall immediately vest, in the event the Participant's Service should subsequently terminate by reason of an Involuntary Termination within a designated period (not to exceed eighteen (18) months) following the effective date of any Corporate Transaction in which those cancellation rights are assigned to the successor corporation (or parent thereof).

C. The Plan Administrator shall have the discretionary authority, exercisable either at the time the unvested shares are issued or any time while the Corporation's cancellation rights remain outstanding under the Stock Issuance Program, to provide that those rights shall automatically terminate in whole or in part, and the shares of Common Stock subject to those terminated rights shall immediately vest, in the event the Participant's Service should subsequently terminate by reason of an Involuntary Termination within a designated period (not to exceed eighteen (18) months) following the effective date of any Change in Control.

D. The Plan Administrator shall have the discretion to provide for cancellation rights with terms different from those in effect under Section
II.A. in connection with a Corporate Transaction.

III. SHARE ESCROW/LEGENDS

Unvested shares may, in the Plan Administrator's discretion, be held in escrow by the Corporation until the Participant's interest in such shares vests or may be issued directly to the Participant with restrictive legends on the certificates evidencing those unvested shares.

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ARTICLE FOUR

AUTOMATIC OPTION GRANT PROGRAM

I. OPTION TERMS

A. Grant Dates.

Option grants shall be made on the dates specified below:

1. Each individual who is serving as a non-employee Board member on the Underwriting Date shall automatically be granted, on the Underwriting Date, a Non-Statutory Option to purchase 5,000 shares of Common Stock, provided such individual has not previously been in the employ of the Corporation (or any Parent or Subsidiary).

2. Each individual who is first elected or appointed as a non-employee Board member on or after the Underwriting Date shall automatically be granted, on the date of such initial election or appointment, a Non-Statutory Option to purchase 5,000 shares of Common Stock, provided such individual has not previously been in the employ of the Corporation (or any Parent or Subsidiary).

3. On the date of each Annual Stockholders Meeting held after the Underwriting Date, each individual who is to continue to serve as an Eligible Director, shall automatically be granted a Non-Statutory Option to purchase an additional 5,000 shares of Common Stock, provided such individual has served as a non-employee Board member for at least six (6) months. There shall be no limit on the number of such 5,000-share option grants any one Eligible Director may receive over his or her period of Board service.

B. Exercise Price.

1. The exercise price per share shall be equal to one hundred percent (100%) of the Fair Market Value per share of Common Stock on the option grant date.

2. The exercise price shall be payable in one or more of the alternative forms authorized under the Discretionary Option Grant Program. Except to the extent the sale and remittance procedure specified thereunder is utilized, payment of the exercise price for the purchased shares must be made on the Exercise Date.

C. Option Term.

Each option shall have a term of ten (10) years measured from the option grant date.

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D. Exercise and Vesting of Options. Each option shall be immediately exercisable for any or all of the option shares. However, any shares purchased under the option shall be subject to repurchase by the Corporation, at the exercise price paid per share, upon the Optionee's cessation of Board service prior to vesting in those shares. Each initial grant shall vest, and the Corporation's repurchase right shall lapse, in a series of four (4) successive equal annual installments over the Optionee's period of continued service as a Board member, with the first such installment to vest upon the Optionee's completion of one (1) year of Board service measured from the option grant date. Each annual grant shall vest, and the Corporation's repurchase right shall lapse, upon the Optionee's completion of one (1) year of Board service measured from the option grant date.

E. Effect of Termination of Board Service. The following provisions shall govern the exercise of any options held by the Optionee at the time the Optionee ceases to serve as a Board member:

(i) The Optionee (or, in the event of Optionee's death, the personal representative of the Optionee's estate or the person or persons to whom the option is transferred pursuant to the Optionee's will or in accordance with the laws of descent and distribution) shall have a twelve (12)-month period following the date of such cessation of Board service in which to exercise each such option.

(ii) During the twelve (12)-month exercise period, the option may not be exercised in the aggregate for more than the number of vested shares of Common Stock for which the option is exercisable at the time of the Optionee's cessation of Board service.

(iii) Should the Optionee cease to serve as a Board member by reason of death or Permanent Disability, then all shares at the time subject to the option shall immediately vest so that such option may, during the twelve (12)-month exercise period following such cessation of Board service, be exercised for all or any portion of those shares as fully-vested shares of Common Stock.

(iv) In no event shall the option remain exercisable after the expiration of the option term. Upon the expiration of the twelve
(12)-month exercise period or (if earlier) upon the expiration of the option term, the option shall terminate and cease to be outstanding for any vested shares for which the option has not been exercised. However, the option shall, immediately upon the Optionee's cessation of Board service for any reason other than death or Permanent Disability, terminate and cease to be outstanding to the extent the option is not otherwise at that time exercisable for vested shares.

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II. CORPORATE TRANSACTION/CHANGE IN CONTROL/HOSTILE TAKE-OVER

A. In the event of any Corporate Transaction, the shares of Common Stock at the time subject to each outstanding option but not otherwise vested shall automatically vest in full so that each such option shall, immediately prior to the effective date of the Corporate Transaction, become fully exercisable for all of the shares of Common Stock at the time subject to such option and may be exercised for all or any portion of those shares as fully-vested shares of Common Stock. Immediately following the consummation of the Corporate Transaction, each automatic option grant shall terminate and cease to be outstanding, except to the extent assumed by the successor corporation (or parent thereof).

B. In connection with any Change in Control, the shares of Common Stock at the time subject to each outstanding option but not otherwise vested shall automatically vest in full so that each such option shall, immediately prior to the effective date of the Change in Control, become fully exercisable for all of the shares of Common Stock at the time subject to such option and may be exercised for all or any portion of those shares as fully- vested shares of Common Stock. Each such option shall remain exercisable for such fully-vested option shares until the expiration or sooner termination of the option term or the surrender of the option in connection with a Hostile Take-Over.

C. Upon the occurrence of a Hostile Take-Over, the Optionee shall have a thirty (30)-day period in which to surrender to the Corporation each automatic option held by him or her for a period of at least six (6) months. The Optionee shall in return be entitled to a cash distribution from the Corporation in an amount equal to the excess of (i) the Take-Over Price of the shares of Common Stock at the time subject to the surrendered option (whether or not the Optionee is otherwise at the time vested in those shares) over (ii) the aggregate exercise price payable for such shares. Such cash distribution shall be paid within five (5) days following the surrender of the option to the Corporation. No approval or consent of the Board or any Plan Administrator shall be required in connection with such option surrender and cash distribution.

D. Each option which is assumed in connection with a Corporate Transaction shall be appropriately adjusted, immediately after such Corporate Transaction, to apply to the number and class of securities which would have been issuable to the Optionee in consummation of such Corporate Transaction had the option been exercised immediately prior to such Corporate Transaction. Appropriate adjustments shall also be made to the exercise price payable per share under each outstanding option, provided the aggregate exercise price payable for such securities shall remain the same.

E. The grant of options under the Automatic Option Grant Program shall in no way affect the right of the Corporation to adjust, reclassify, reorganize or otherwise change its capital or business structure or to merge, consolidate, dissolve, liquidate or sell or transfer all or any part of its business or assets.

19.

III. AMENDMENT OF THE AUTOMATIC OPTION GRANT PROGRAM

The provisions of this Automatic Option Grant Program, together with the option grants outstanding thereunder, may not be amended at intervals more frequently than once every six (6) months, other than to the extent necessary to comply with applicable Federal income tax laws and regulations.

IV. REMAINING TERMS

The remaining terms of each option granted under the Automatic Option Grant Program shall be the same as the terms in effect for option grants made under the Discretionary Option Grant Program.

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ARTICLE FIVE

MISCELLANEOUS

I. FINANCING

A. The Plan Administrator may permit any Optionee or Participant to pay the option exercise price under the Discretionary Option Grant Program or the purchase price for shares issued under the Stock Issuance Program by delivering a promissory note payable in one or more installments. The terms of any such promissory note (including the interest rate and the terms of repayment) shall be established by the Plan Administrator in its sole discretion. Promissory notes may be authorized with or without security or collateral. In all events, the maximum credit available to the Optionee or Participant may not exceed the sum of (i) the aggregate option exercise price or purchase price payable for the purchased shares plus (ii) any Federal, state and local income and employment tax liability incurred by the Optionee or the Participant in connection with the option exercise or share purchase.

B. The Plan Administrator may, in its discretion, determine that one or more such promissory notes shall be subject to forgiveness by the Corporation in whole or in part upon such terms as the Plan Administrator may deem appropriate.

II. TAX WITHHOLDING

A. The Corporation's obligation to deliver shares of Common Stock upon the exercise of options or upon the issuance or vesting of such shares under the Plan shall be subject to the satisfaction of all applicable Federal, state and local income and employment tax withholding requirements.

B. The Plan Administrator may, in its discretion, provide any or all holders of Non-Statutory Options or unvested shares of Common Stock under the Plan (other than the options granted or the shares issued under the Automatic Option Grant Program) with the right to use shares of Common Stock in satisfaction of all or part of the Taxes incurred by such holders in connection with the exercise of their options or the vesting of their shares. Such right may be provided to any such holder in either or both of the following formats:

(i) Stock Withholding: The election to have the Corporation withhold, from the shares of Common Stock otherwise issuable upon the exercise of such Non-Statutory Option or the vesting of such shares, a portion of those shares with an aggregate Fair Market Value equal to the

21.

percentage of the Taxes (not to exceed one hundred percent (100%)) designated by the holder.

(ii) Stock Delivery: The election to deliver to the Corporation, at the time the Non-Statutory Option is exercised or the shares vest, one or more shares of Common Stock previously acquired by such holder (other than in connection with the option exercise or share vesting triggering the Taxes) with an aggregate Fair Market Value equal to the percentage of the Taxes (not to exceed one hundred percent (100%)) designated by the holder.

III. EFFECTIVE DATE AND TERM OF THE PLAN

A. The Plan shall become effective with respect to the Discretionary Option Grant and Stock Issuance Program on the Plan Effective Date. The Automatic Option Grant Program shall become effective on the Underwriting Date. Options may be granted under the Discretionary Option Grant Program at any time on or after the Plan Effective Date and the initial options under the Automatic Option Grant Program shall be made on the Underwriting Date to each Eligible Director at that time. However, no options granted under the Plan may be exercised, and no shares shall be issued under the Plan, until the Plan is approved by the Corporation's stockholders. If such stockholder approval is not obtained within twelve (12) months after the Plan Effective Date, then all options previously granted under this Plan shall terminate and cease to be outstanding, and no further options shall be granted and no shares shall be issued under the Plan.

B. The Plan shall serve as the successor to the Predecessor Plan, and no further option grants shall be made under the Predecessor Plan after the
Section 12(g) Registration Date. All options outstanding under the Predecessor Plan as of such date shall be incorporated into the Plan at that time and shall be treated as outstanding options under the Plan. However, each outstanding option so incorporated shall continue to be governed solely by the terms of the documents evidencing such option, and no provision of the Plan shall be deemed to affect or otherwise modify the rights or obligations of the holders of such incorporated options with respect to their acquisition of shares of Common Stock.

C. One or more provisions of the Plan, including (without limitation) the option/vesting acceleration provisions of Article Two relating to Corporate Transactions and Changes in Control, may, in the Plan Administrator's discretion, be extended to one or more options incorporated from the Predecessor Plan which do not otherwise contain such provisions.

D. The Plan shall terminate upon the earliest of (i) April 29, 2006,
(ii) the date on which all shares available for issuance under the Plan shall have been issued pursuant to the exercise of the options or the issuance of shares (whether vested or unvested) under the Plan or (iii) the termination of all outstanding options in connection

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with a Corporate Transaction. Upon such Plan termination, all outstanding options and unvested stock issuances shall continue to have force and effect in accordance with the provisions of the documents evidencing such options or issuances.

IV. AMENDMENT OF THE PLAN

A. The Board shall have complete and exclusive power and authority to amend or modify the Plan in any or all respects. However, (i) no such amendment or modification shall adversely affect any rights and obligations with respect to options, stock appreciation rights or unvested stock issuances at the time outstanding under the Plan unless the Optionee or the Participant consents to such amendment or modification, and (ii) any amendment made to the Automatic Option Grant Program (or any options or stock issuances outstanding thereunder) shall be in compliance with the limitations of that program. In addition, the Board shall not, without the approval of the Corporation's stockholders, (i) materially increase the maximum number of shares issuable under the Plan, the number of shares for which options may be granted under the Automatic Option Grant Program, or the maximum number of shares for which any one person may be granted options, separately exercisable stock appreciation rights and direct stock issuances per calendar year, except for permissible adjustments in the event of certain changes in the Corporation's capitalization, (ii) materially modify the eligibility requirements for Plan participation or (iii) materially increase the benefits accruing to Plan participants.

B. Options to purchase shares of Common Stock may be granted under the Discretionary Option Grant Program and shares of Common Stock may be issued under the Stock Issuance Program that are in each instance in excess of the number of shares then available for issuance under the Plan, provided any excess shares actually issued under those programs are held in escrow until there is obtained stockholder approval of an amendment sufficiently increasing the number of shares of Common Stock available for issuance under the Plan. If such stockholder approval is not obtained within twelve (12) months after the date the first such excess grants or issuances are made, then (i) any unexercised options granted on the basis of such excess shares shall terminate and cease to be outstanding and (ii) the Corporation shall promptly refund to the Optionees and the Participants the exercise or purchase price paid for any excess shares issued under the Plan and held in escrow, together with interest (at the applicable Short Term Federal Rate) for the period the shares were held in escrow, and such shares shall thereupon be automatically cancelled and cease to be outstanding.

V. USE OF PROCEEDS

Any cash proceeds received by the Corporation from the sale of shares of Common Stock under the Plan shall be used for general corporate purposes.

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VI. REGULATORY APPROVALS

A. The implementation of the Plan, the granting of any option or stock appreciation right under the Plan and the issuance of any shares of Common Stock (i) upon the exercise of any option or stock appreciation right or (ii) under the Stock Issuance Program shall be subject to the Corporation's procurement of all approvals and permits required by regulatory authorities having jurisdiction over the Plan, the options and stock appreciation rights granted under it and the shares of Common Stock issued pursuant to it.

B. No shares of Common Stock or other assets shall be issued or delivered under the Plan unless and until there shall have been compliance with all applicable requirements of Federal and state securities laws, including the filing and effectiveness of the Form S-8 registration statement for the shares of Common Stock issuable under the Plan, and all applicable listing requirements of any stock exchange (or the Nasdaq National Market, if applicable) on which Common Stock is then listed for trading.

VII. NO EMPLOYMENT/SERVICE RIGHTS

Nothing in the Plan shall confer upon the Optionee or the Participant any right to continue in Service for any period of specific duration or interfere with or otherwise restrict in any way the rights of the Corporation (or any Parent or Subsidiary employing or retaining such person) or of the Optionee or the Participant, which rights are hereby expressly reserved by each, to terminate such person's Service at any time for any reason, with or without cause.

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APPENDIX

The following definitions shall be in effect under the Plan:

A. AUTOMATIC OPTION GRANT PROGRAM shall mean the automatic option grant program in effect under the Plan.

B. BOARD shall mean the Corporation's Board of Directors.

C. CHANGE IN CONTROL shall mean a change in ownership or control of the Corporation effected through either of the following transactions:

(i) the acquisition, directly or indirectly, by any person or related group of persons (other than the Corporation or a person that directly or indirectly controls, is controlled by, or is under common control with, the Corporation), of beneficial ownership (within the meaning of Rule 13d-3 of the 1934 Act) of securities possessing more than fifty percent (50%) of the total combined voting power of the Corporation's outstanding securities pursuant to a tender or exchange offer made directly to the Corporation's stockholders which the Board does not recommend such stockholders to accept, or

(ii) a change in the composition of the Board over a period of thirty-six (36) consecutive months or less such that a majority of the Board members ceases, by reason of one or more contested elections for Board membership, to be comprised of individuals who either (A) have been Board members continuously since the beginning of such period or (B) have been elected or nominated for election as Board members during such period by at least a majority of the Board members described in clause (A) who were still in office at the time the Board approved such election or nomination.

D. CODE shall mean the Internal Revenue Code of 1986, as amended.

E. COMMON STOCK shall mean the Corporation's common stock.

F. CORPORATE TRANSACTION shall mean either of the following stockholder-approved transactions to which the Corporation is a party:

(i) a merger or consolidation in which securities possessing more than fifty percent (50%) of the total combined voting power of the Corporation's outstanding securities are transferred to a person or persons different from the persons holding those securities immediately prior to such transaction; or

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(ii) the sale, transfer or other disposition of all or substantially all of the Corporation's assets in complete liquidation or dissolution of the Corporation.

G. CORPORATION shall mean CardioVascular Dynamics, Inc., a Delaware corporation, and any corporate successor to all or substantially all of the assets or voting stock of CardioVascular Dynamics, Inc. which shall by appropriate action adopt the Plan.

H. DISCRETIONARY OPTION GRANT PROGRAM shall mean the discretionary option grant program in effect under the Plan.

I. DOMESTIC RELATIONS ORDER shall mean any judgment, decree or order (including approval of a property settlement agreement) which provides or otherwise conveys, pursuant to applicable State domestic relations laws (including community property laws), marital property rights to any spouse or former spouse of the Optionee.

J. ELIGIBLE DIRECTOR shall mean a non-employee Board member eligible to participate in the Automatic Option Grant Program in accordance with the eligibility provisions of Article One.

K. EMPLOYEE shall mean an individual who is in the employ of the Corporation (or any Parent or Subsidiary), subject to the control and direction of the employer entity as to both the work to be performed and the manner and method of performance.

L. EXERCISE DATE shall mean the date on which the Corporation shall have received written notice of the option exercise.

M. FAIR MARKET VALUE per share of Common Stock on any relevant date shall be determined in accordance with the following provisions:

(i) If the Common Stock is at the time traded on the Nasdaq National Market, then the Fair Market Value shall be the closing selling price per share of Common Stock on the date in question, as such price is reported by the National Association of Securities Dealers on the Nasdaq National Market or any successor system. If there is no closing selling price for the Common Stock on the date in question, then the Fair Market Value shall be the closing selling price on the last preceding date for which such quotation exists.

(ii) If the Common Stock is at the time listed on any Stock Exchange, then the Fair Market Value shall be the closing selling price per share of Common Stock on the date in question on the Stock Exchange determined by the Plan Administrator to be the primary market for the Common Stock, as such price is officially quoted in the composite tape of

A-2.

transactions on such exchange. If there is no closing selling price for the Common Stock on the date in question, then the Fair Market Value shall be the closing selling price on the last preceding date for which such quotation exists.

(iii) For purposes of any option grants made on the Underwriting Date, the Fair Market Value shall be deemed to be equal to the price per share at which the Common Stock is sold in the initial public offering pursuant to the Underwriting Agreement.

(iv) For purposes of any option grants made prior to the Underwriting Date, the Fair Market Value shall be determined by the Plan Administrator, after taking into account such factors as it deems appropriate.

N. HOSTILE TAKE-OVER shall mean a change in ownership of the Corporation effected through the following transaction:

(i) the acquisition, directly or indirectly, by any person or related group of persons (other than the Corporation or a person that directly or indirectly controls, is controlled by, or is under common control with, the Corporation) of beneficial ownership (within the meaning of Rule 13d-3 of the 1934 Act) of securities possessing more than fifty percent (50%) of the total combined voting power of the Corporation's outstanding securities pursuant to a tender or exchange offer made directly to the Corporation's stockholders which the Board does not recommend such stockholders to accept, and

(ii) more than fifty percent (50%) of the securities so acquired are accepted from persons other than Section 16 Insiders.

O. INCENTIVE OPTION shall mean an option which satisfies the requirements of Code Section 422.

P. INVOLUNTARY TERMINATION shall mean the termination of the Service of any individual which occurs by reason of:

(i) such individual's involuntary dismissal or discharge by the Corporation for reasons other than Misconduct, or

(ii) such individual's voluntary resignation following (A) a change in his or her position with the Corporation which materially reduces his or her level of responsibility, (B) a reduction in his or her level of compensation (including base salary, fringe benefits and participation in corporate-performance based bonus or incentive programs) by more than

A-3.

fifteen percent (15%) or (C) a relocation of such individual's place of employment by more than fifty (50) miles, provided and only if such change, reduction or relocation is effected by the Corporation without the individual's consent.

Q. MISCONDUCT shall mean the commission of any act of fraud, embezzlement or dishonesty by the Optionee or Participant, any unauthorized use or disclosure by such person of confidential information or trade secrets of the Corporation (or any Parent or Subsidiary), or any other intentional misconduct by such person adversely affecting the business or affairs of the Corporation (or any Parent or Subsidiary) in a material manner. The foregoing definition shall not be deemed to be inclusive of all the acts or omissions which the Corporation (or any Parent or Subsidiary) may consider as grounds for the dismissal or discharge of any Optionee, Participant or other person in the Service of the Corporation (or any Parent or Subsidiary).

R. 1934 ACT shall mean the Securities Exchange Act of 1934, as amended.

S. NON-STATUTORY OPTION shall mean an option not intended to satisfy the requirements of Code Section 422.

T. OPTIONEE shall mean any person to whom an option is granted under the Discretionary Option Grant or Automatic Option Grant Program.

U. PARENT shall mean any corporation (other than the Corporation) in an unbroken chain of corporations ending with the Corporation, provided each corporation in the unbroken chain (other than the Corporation) owns, at the time of the determination, stock possessing fifty percent (50%) or more of the total combined voting power of all classes of stock in one of the other corporations in such chain.

V. PARTICIPANT shall mean any person who is issued shares of Common Stock under the Stock Issuance Program.

W. PERMANENT DISABILITY OR PERMANENTLY DISABLED shall mean the inability of the Optionee or the Participant to engage in any substantial gainful activity by reason of any medically determinable physical or mental impairment expected to result in death or to be of continuous duration of twelve (12) months or more. However, solely for the purposes of the Automatic Option Grant Program, Permanent Disability or Permanently Disabled shall mean the inability of the non-employee Board member to perform his or her usual duties as a Board member by reason of any medically determinable physical or mental impairment expected to result in death or to be of continuous duration of twelve (12) months or more.

X. PLAN shall mean the Corporation's 1996 Stock Option/Stock Issuance Plan, as set forth in this document.

A-4.

Y. PLAN ADMINISTRATOR shall mean the particular entity, whether the Primary Committee, the Board or the Secondary Committee, which is authorized to administer the Discretionary Option Grant and Stock Issuance Programs with respect to one or more classes of eligible persons, to the extent such entity is carrying out its administrative functions under those programs with respect to the persons under its jurisdiction.

Z. PLAN EFFECTIVE DATE shall mean April 30, 1996, the date on which the Plan was adopted by the Board.

AA. PREDECESSOR PLAN shall mean the Corporation's existing 1995 Stock Option Plan.

AB. PRIMARY COMMITTEE shall mean the committee of two (2) or more non-employee Board members appointed by the Board to administer the Discretionary Option Grant and Stock Issuance Programs with respect to Section 16 Insiders.

AC. QUALIFIED DOMESTIC RELATIONS ORDER shall mean a Domestic Relations Order which substantially complies with the requirements of Code Section 414(p). The Plan Administrator shall have the sole discretion to determine whether a Domestic Relations Order is a Qualified Domestic Relations Order.

AD. SECONDARY COMMITTEE shall mean a committee of two (2) or more Board members appointed by the Board to administer the Discretionary Option Grant and Stock Issuance Programs with respect to eligible persons other than Section 16 Insiders.

AE. SECTION 16 INSIDER shall mean an officer or director of the Corporation subject to the short-swing profit liabilities of Section 16 of the 1934 Act.

AF. SECTION 12(G) REGISTRATION DATE shall mean the first date on which the Common Stock is first registered under Section 12(g) of the 1934 Act.

AG. SERVICE shall mean the performance of services to the Corporation (or any Parent or Subsidiary) by a person in the capacity of an Employee, a non-employee member of the board of directors or a consultant or independent advisor, except to the extent otherwise specifically provided in the documents evidencing the option grant or stock issuance.

AH. STOCK EXCHANGE shall mean either the American Stock Exchange or the New York Stock Exchange.

AI. STOCK ISSUANCE AGREEMENT shall mean the agreement entered into by the Corporation and the Participant at the time of issuance of shares of Common Stock under the Stock Issuance Program.

A-5.

AJ. STOCK ISSUANCE PROGRAM shall mean the stock issuance program in effect under the Plan.

AK. SUBSIDIARY shall mean any corporation (other than the Corporation) in an unbroken chain of corporations beginning with the Corporation, provided each corporation (other than the last corporation) in the unbroken chain owns, at the time of the determination, stock possessing fifty percent (50%) or more of the total combined voting power of all classes of stock in one of the other corporations in such chain.

AL. TAKE-OVER PRICE shall mean the greater of (i) the Fair Market Value per share of Common Stock on the date the option is surrendered to the Corporation in connection with a Hostile Take-Over or (ii) the highest reported price per share of Common Stock paid by the tender offeror in effecting such Hostile Take-Over. However, if the surrendered option is an Incentive Option, the Take-Over Price shall not exceed the clause (i) price per share.

AM. TAXES shall mean the Federal, state and local income and employment tax liabilities incurred by the holder of Non-Statutory Options or unvested shares of Common Stock in connection with the exercise of those options or the vesting of those shares.

AN. 10% STOCKHOLDER shall mean the owner of stock (as determined under Code
Section 424(d)) possessing more than ten percent (10%) of the total combined voting power of all classes of stock of the Corporation (or any Parent or Subsidiary).

AO. UNDERWRITING AGREEMENT shall mean the agreement between the Corporation and the underwriter or underwriters managing the initial public offering of the Common Stock.

AP. UNDERWRITING DATE shall mean the date on which the Underwriting Agreement is executed and priced in connection with the initial public offering of the Common Stock.

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EXHIBIT 99.2

CARDIOVASCULAR DYNAMICS, INC.
NOTICE OF GRANT OF STOCK OPTION

Notice is hereby given of the following option grant (the "Option") to purchase shares of the Common Stock of CardioVascular Dynamics, Inc. (the "Corporation"):

Optionee: _____________________________________________________________

Grant Date: ___________________________________________________________

Vesting Commencement Date: ____________________________________________

Exercise Price: $___________________________________ per share

Number of Option Shares: ______________________________ shares

Expiration Date: ______________________________________________________

Type of Option: ____ Incentive Stock Option

____ Non-Statutory Stock Option

Exercise Schedule: The Option shall become exercisable with respect to
(i) twenty-five percent (25%) of the Option Shares upon Optionee's completion of one (1) year of Service measured from the Vesting Commencement Date and (ii) the balance of the Option Shares in successive equal monthly installments upon Optionee's completion of each of the next thirty-six (36) months of Service measured from and after the first anniversary of the Vesting Commencement Date. In no event shall the Option become exercisable for any additional Option Shares after Optionee's cessation of Service.

Optionee understands and agrees that the Option is granted subject to and in accordance with the terms of the CardioVascular Dynamics, Inc. 1996 Stock Option/Stock Issuance Plan (the "Plan"). Optionee further agrees to be bound by the terms of the Plan and the terms of the Option as set forth in the Stock Option Agreement attached hereto as Exhibit A.

Optionee hereby acknowledges receipt of a copy of the official prospectus for the Plan in the form attached hereto as Exhibit B. A copy of the Plan is available upon request made to the Corporate Secretary at the Corporation's principal offices.

No Employment or Service Contract. Nothing in this Notice or in the attached Stock Option Agreement or Plan shall confer upon Optionee any right to continue in Service for any period of specific duration or interfere with or otherwise restrict in any way the rights of the Corporation (or any Parent or Subsidiary employing or retaining Optionee) or of Optionee, which rights are hereby expressly reserved by each, to terminate Optionee's Service at any time for any reason, with or without cause.

Definitions. All capitalized terms in this Notice shall have the meaning assigned to them in this Notice or in the attached Stock Option Agreement.

_______________, 199_
Date

CARDIOVASCULAR DYNAMICS, INC.

By: _____________________________

Title: __________________________

Address: ________________________

ATTACHMENTS
Exhibit A - Stock Option Agreement
Exhibit B - Plan Summary and Prospectus

2.

EXHIBIT A

STOCK OPTION AGREEMENT

EXHIBIT B

EXHIBIT 99.3

CARDIOVASCULAR DYNAMICS, INC.
STOCK OPTION AGREEMENT

RECITALS

A. The Board has adopted the Plan for the purpose of retaining the services of selected Employees, non-employee members of the Board or the board of directors of any Parent or Subsidiary and consultants and other independent advisors who provide services to the Corporation (or any Parent or Subsidiary).

B. Optionee is to render valuable services to the Corporation (or a Parent or Subsidiary), and this Agreement is executed pursuant to, and is intended to carry out the purposes of, the Plan in connection with the Corporation's grant of an option to Optionee.

C. All capitalized terms in this Agreement shall have the meaning assigned to them in the attached Appendix.

NOW, THEREFORE, it is hereby agreed as follows:

1. GRANT OF OPTION. The Corporation hereby grants to Optionee, as of the Grant Date, an option to purchase up to the number of Option Shares specified in the Grant Notice. The Option Shares shall be purchasable from time to time during the option term specified in Paragraph 2 at the Exercise Price.

2. OPTION TERM. This option shall have a term of ten (10) years measured from the Grant Date and shall accordingly expire at the close of business on the Expiration Date, unless sooner terminated in accordance with Paragraph 5 or 6.

3. LIMITED TRANSFERABILITY. This option shall be neither transferable nor assignable by Optionee other than by will or by the laws of descent and distribution following Optionee's death and may be exercised, during Optionee's lifetime, only by Optionee. However, if this option is designated a Non-Statutory Option in the Grant Notice, then this option may also be assigned in whole or in part during Optionee's lifetime in accordance with the terms of a Qualified Domestic Relations Order. The assigned portion shall be exercisable only by the person or persons who acquire a proprietary interest in the option pursuant to such Qualified Domestic Relations Order. The terms applicable to the assigned portion shall be the same as those in effect for this option immediately prior to such assignment and shall be set forth in such documents issued to the assignee as the Plan Administrator may deem appropriate.

4. DATES OF EXERCISE. This option shall become exercisable for the Option Shares in one or more installments as specified in the Grant Notice. As the option becomes exercisable for such installments, those installments shall accumulate and the option shall remain exercisable for the accumulated installments until the Expiration Date or sooner termination of the option term under Paragraph 5 or 6.

5. CESSATION OF SERVICE. The option term specified in Paragraph 2 shall terminate (and this option shall cease to be outstanding) prior to the Expiration Date should any of the following provisions become applicable:

(i) Should Optionee cease to remain in Service for any reason (other than death, Permanent Disability or Misconduct) while this option is outstanding, then Optionee shall have a period of three
(3) months (commencing with the date of such cessation of Service) during which to exercise this option, but in no event shall this option be exercisable at any time after the Expiration Date.

(ii) Should Optionee die while this option is outstanding, then the personal representative of Optionee's estate or the person or persons to whom the option is transferred pursuant to Optionee's will or in accordance with the laws of descent and distribution shall have the right to exercise this option. Such right shall lapse and this option shall cease to be outstanding upon the earlier of (A) the expiration of the twelve (12)- month period measured from the date of Optionee's death or (B) the Expiration Date.

(iii) Should Optionee cease Service by reason of Permanent Disability while this option is outstanding, then Optionee shall have a period of twelve (12) months (commencing with the date of such cessation of Service) during which to exercise this option. In no event shall this option be exercisable at any time after the Expiration Date.

(iv) During the limited period of post-Service exercisability, this option may not be exercised in the aggregate for more than the number of vested Option Shares for which the option is exercisable at the time of Optionee's cessation of Service. Upon the expiration of such limited exercise period or (if earlier) upon the Expiration Date, this option shall terminate and cease to be outstanding for any vested Option Shares for which the option has not been exercised. To the extent Optionee is not vested in the Option Shares at the time of Optionee's cessation of Service, this option shall immediately terminate and cease to be outstanding with respect to those shares.

2.

(v) Should Optionee's Service be terminated for Misconduct, then this option shall terminate immediately and cease to remain outstanding.

6. SPECIAL ACCELERATION OF OPTION.

(a) In the event of a Corporate Transaction, the exercisability of this option, to the extent outstanding at such time but not otherwise fully exercisable, shall automatically accelerate so that this option shall, immediately prior to the effective date of the Corporate Transaction, become exercisable for any or all of the Option Shares at the time subject to this option as fully-vested shares of Common Stock. No such acceleration of this option, however, shall occur if and to the extent: (i) this option is, in connection with the Corporate Transaction, either to be assumed by the successor corporation (or parent thereof) or to be replaced with a comparable option to purchase shares of the capital stock of the successor corporation (or parent thereof) or (ii) this option is to be replaced with a cash incentive program of the successor corporation which preserves the spread existing on the Option Shares for which this option is not exercisable at the time of the Corporate Transaction (the excess of the Fair Market Value of such Option Shares over the aggregate Exercise Price payable for such shares) and provides for subsequent pay-out in accordance with the same exercise schedule in effect for the option pursuant to the option exercise schedule set forth in the Grant Notice. The determination of option comparability under clause (i) shall be made by the Plan Administrator, and such determination shall be final, binding and conclusive.

(b) Immediately following the Corporate Transaction, this option, to the extent not previously exercised, shall terminate and cease to be outstanding, except to the extent assumed by the successor corporation (or parent thereof) in connection with the Corporate Transaction.

(c) If this option is assumed in connection with a Corporate Transaction, then this option shall be appropriately adjusted, immediately after such Corporate Transaction, to apply to the number and class of securities which would have been issuable to Optionee in consummation of such Corporate Transaction had the option been exercised immediately prior to such Corporate Transaction, and appropriate adjustments shall also be made to the Exercise Price, provided the aggregate Exercise Price shall remain the same.

(d) This Agreement shall not in any way affect the right of the Corporation to adjust, reclassify, reorganize or otherwise change its capital or business structure or to merge, consolidate, dissolve, liquidate or sell or transfer all or any part of its business or assets.

7. ADJUSTMENT IN OPTION SHARES. Should any change be made to the Common Stock by reason of any stock split, stock dividend, recapitalization, combination

3.

of shares, exchange of shares or other change affecting the outstanding Common Stock as a class without the Corporation's receipt of consideration, appropriate adjustments shall be made to (i) the total number and/or class of securities subject to this option and (ii) the Exercise Price in order to reflect such change and thereby preclude a dilution or enlargement of benefits hereunder.

8. STOCKHOLDER RIGHTS. The holder of this option shall not have any stockholder rights with respect to the Option Shares until such person shall have exercised the option, paid the Exercise Price and become a holder of record of the purchased shares.

9. MANNER OF EXERCISING OPTION.

(a) In order to exercise this option with respect to all or any part of the Option Shares for which this option is at the time exercisable, Optionee (or any other person or persons exercising the option) must take the following actions:

(i) Execute and deliver to the Corporation a Notice of Exercise for the Option Shares for which the option is exercised.

(ii) Pay the aggregate Exercise Price for the purchased shares in one or more of the following forms:

(A) cash or check made payable to the Corporation;

(B) a promissory note payable to the Corporation, but only to the extent authorized by the Plan Administrator in accordance with Paragraph 13;

(C) shares of Common Stock held by Optionee (or any other person or persons exercising the option) for the requisite period necessary to avoid a charge to the Corporation's earnings for financial reporting purposes and valued at Fair Market Value on the Exercise Date; or

(D) through a special sale and remittance procedure pursuant to which Optionee (or any other person or persons exercising the option) shall concurrently provide irrevocable written instructions (I) to a Corporation-designated brokerage firm to effect the immediate sale of the purchased shares and remit to the Corporation, out of the sale proceeds available on the settlement date, sufficient funds to cover the aggregate Exercise Price payable for the purchased shares plus all applicable Federal, state and local income and employment taxes required to be withheld by the Corporation by

4.

reason of such exercise and (II) to the Corporation to deliver the certificates for the purchased shares directly to such brokerage firm in order to complete the sale.

Except to the extent the sale and remittance procedure is utilized in connection with the option exercise, payment of the Exercise Price must accompany the Notice of Exercise delivered to the Corporation in connection with the option exercise.

(iii) Furnish to the Corporation appropriate documentation that the person or persons exercising the option (if other than Optionee) have the right to exercise this option.

(iv) Make appropriate arrangements with the Corporation (or Parent or Subsidiary employing or retaining Optionee) for the satisfaction of all Federal, state and local income and employment tax withholding requirements applicable to the option exercise.

(b) As soon as practical after the Exercise Date, the Corporation shall issue to or on behalf of Optionee (or any other person or persons exercising this option) a certificate for the purchased Option Shares, with the appropriate legends affixed thereto.

(c) In no event may this option be exercised for any fractional shares.

10. COMPLIANCE WITH LAWS AND REGULATIONS.

(a) The exercise of this option and the issuance of the Option Shares upon such exercise shall be subject to compliance by the Corporation and Optionee with all applicable requirements of law relating thereto and with all applicable regulations of any stock exchange (or the Nasdaq National Market, if applicable) on which the Common Stock may be listed for trading at the time of such exercise and issuance.

(b) The inability of the Corporation to obtain approval from any regulatory body having authority deemed by the Corporation to be necessary to the lawful issuance and sale of any Common Stock pursuant to this option shall relieve the Corporation of any liability with respect to the non-issuance or sale of the Common Stock as to which such approval shall not have been obtained. The Corporation, however, shall use its best efforts to obtain all such approvals.

11. SUCCESSORS AND ASSIGNS. Except to the extent otherwise provided in Paragraphs 3 and 6, the provisions of this Agreement shall inure to the benefit of, and be

5.

binding upon, the Corporation and its successors and assigns and Optionee, Optionee's assigns and the legal representatives, heirs and legatees of Optionee's estate.

12. NOTICES. Any notice required to be given or delivered to the Corporation under the terms of this Agreement shall be in writing and addressed to the Corporation at its principal corporate offices. Any notice required to be given or delivered to Optionee shall be in writing and addressed to Optionee at the address indicated below Optionee's signature line on the Grant Notice. All notices shall be deemed effective upon personal delivery or upon deposit in the U.S. mail, postage prepaid and properly addressed to the party to be notified.

13. FINANCING. The Plan Administrator may, in its absolute discretion and without any obligation to do so, permit Optionee to pay the Exercise Price for the purchased Option Shares by delivering a promissory note. The terms of any such promissory note (including the interest rate, the requirements for collateral and the terms of repayment) shall be established by the Plan Administrator in its sole discretion.1

14. CONSTRUCTION. This Agreement and the option evidenced hereby are made and granted pursuant to the Plan and are in all respects limited by and subject to the terms of the Plan. All decisions of the Plan Administrator with respect to any question or issue arising under the Plan or this Agreement shall be conclusive and binding on all persons having an interest in this option.

15. GOVERNING LAW. The interpretation, performance and enforcement of this Agreement shall be governed by the laws of the State of California without resort to that State's conflict-of-laws rules.

16. EXCESS SHARES. If the Option Shares covered by this Agreement exceed, as of the Grant Date, the number of shares of Common Stock which may without stockholder approval be issued under the Plan, then this option shall be void with respect to such excess shares, unless stockholder approval of an amendment sufficiently increasing the number of shares of Common Stock issuable under the Plan is obtained in accordance with the provisions of the Plan.

17. ADDITIONAL TERMS APPLICABLE TO AN INCENTIVE OPTION. In the event this option is designated an Incentive Option in the Grant Notice, the following terms and conditions shall also apply to the grant:

6.

(i) This option shall cease to qualify for favorable tax treatment as an Incentive Option if (and to the extent) this option is exercised for one or more Option Shares: (A) more than three (3) months after the date Optionee ceases to be an Employee for any reason other than death or Permanent Disability or (B) more than twelve (12) months after the date Optionee ceases to be an Employee by reason of Permanent Disability.

(ii) No installment under this option shall qualify for favorable tax treatment as an Incentive Option if (and to the extent) the aggregate Fair Market Value (determined at the Grant Date) of the Common Stock for which such installment first becomes exercisable hereunder would, when added to the aggregate value (determined as of the respective date or dates of grant) of any earlier installments of the Common Stock and any other securities for which this option or any other Incentive Options granted to Optionee prior to the Grant Date (whether under the Plan or any other option plan of the Corporation or any Parent or Subsidiary) first become exercisable during the same calendar year, exceed One Hundred Thousand Dollars ($100,000) in the aggregate. Should such One Hundred Thousand Dollar ($100,000) limitation be exceeded in any calendar year, this option shall nevertheless become exercisable for the excess shares in such calendar year as a Non-Statutory Option.

(iii) Should the exercisability of this option be accelerated upon a Corporate Transaction, then this option shall qualify for favorable tax treatment as an Incentive Option only to the extent the aggregate Fair Market Value (determined at the Grant Date) of the Common Stock for which this option first becomes exercisable in the calendar year in which the Corporate Transaction occurs does not, when added to the aggregate value (determined as of the respective date or dates of grant) of the Common Stock or other securities for which this option or one or more other Incentive Options granted to Optionee prior to the Grant Date (whether under the Plan or any other option plan of the Corporation or any Parent or Subsidiary) first become exercisable during the same calendar year, exceed One Hundred Thousand Dollars ($100,000) in the aggregate. Should the applicable One Hundred Thousand Dollar ($100,000) limitation be exceeded in the calendar year of such Corporate Transaction, the option may nevertheless be exercised for the excess shares in such calendar year as a Non-Statutory Option.

(iv) Should Optionee hold, in addition to this option, one or more other options to purchase Common Stock which become exercisable for the first time in the same calendar year as this option, then the

7.

foregoing limitations on the exercisability of such options as Incentive Options shall be applied on the basis of the order in which such options are granted.

8.

EXHIBIT I

NOTICE OF EXERCISE

I hereby notify CardioVascular Dynamics, Inc. (the "Corporation") that I elect to purchase shares of the Corporation's Common Stock (the "Purchased Shares") at the option exercise price of $ per share (the "Exercise Price") pursuant to that certain option (the "Option") granted to me under the Corporation's 1996 Stock Option/Stock Issuance Plan on , 199 .

Concurrently with the delivery of this Exercise Notice to the Corporation, I shall hereby pay to the Corporation the Exercise Price for the Purchased Shares in accordance with the provisions of my agreement with the Corporation (or other documents) evidencing the Option and shall deliver whatever additional documents may be required by such agreement as a condition for exercise. Alternatively, I may utilize the special broker-dealer sale and remittance procedure specified in my agreement to effect payment of the Exercise Price.

________________, 199_
Date

Print name in exact manner
it is to appear on the
stock certificate:                               _______________________________

Address to which certificate
is to be sent, if different
from address above:                              _______________________________

                                                 _______________________________

Social Security Number:                          _______________________________

Employee Number:                                 _______________________________

APPENDIX

The following definitions shall be in effect under the Agreement:

A. AGREEMENT shall mean this Stock Option Agreement.

B. BOARD shall mean the Corporation's Board of Directors.

C. CODE shall mean the Internal Revenue Code of 1986, as amended.

D. COMMON STOCK shall mean the Corporation's common stock.

E. CORPORATE TRANSACTION shall mean either of the following stockholder- approved transactions to which the Corporation is a party:

(i) a merger or consolidation in which securities possessing more than fifty percent (50%) of the total combined voting power of the Corporation's outstanding securities are transferred to a person or persons different from the persons holding those securities immediately prior to such transaction, or

(ii) the sale, transfer or other disposition of all or substantially all of the Corporation's assets in complete liquidation or dissolution of the Corporation.

F. CORPORATION shall mean CardioVascular Dynamics, Inc., a Delaware corporation.

G. DOMESTIC RELATIONS ORDER shall mean any judgment, decree or order (including approval of a property settlement agreement) which provides or otherwise conveys, pursuant to applicable State domestic relations laws (including community property laws), marital property rights to any spouse or former spouse of the Optionee.

H. EMPLOYEE shall mean an individual who is in the employ of the Corporation (or any Parent or Subsidiary), subject to the control and direction of the employer entity as to both the work to be performed and the manner and method of performance.

I. EXERCISE DATE shall mean the date on which the option shall have been exercised in accordance with Paragraph 9 of the Agreement.

J. EXERCISE PRICE shall mean the exercise price per share as specified in the Grant Notice.

A-1.

K. EXPIRATION DATE shall mean the date on which the option expires as specified in the Grant Notice.

L. FAIR MARKET VALUE per share of Common Stock on any relevant date shall be determined in accordance with the following provisions:

(i) If the Common Stock is at the time traded on the Nasdaq National Market, then the Fair Market Value shall be the closing selling price per share of Common Stock on the date in question, as the price is reported by the National Association of Securities Dealers on the Nasdaq National Market or any successor system. If there is no closing selling price for the Common Stock on the date in question, then the Fair Market Value shall be the closing selling price on the last preceding date for which such quotation exists.

(ii) If the Common Stock is at the time listed on any Stock Exchange, then the Fair Market Value shall be the closing selling price per share of Common Stock on the date in question on the Stock Exchange determined by the Plan Administrator to be the primary market for the Common Stock, as such price is officially quoted in the composite tape of transactions on such exchange. If there is no closing selling price for the Common Stock on the date in question, then the Fair Market Value shall be the closing selling price on the last preceding date for which such quotation exists.

M. GRANT DATE shall mean the date of grant of the option as specified in the Grant Notice.

N. GRANT NOTICE shall mean the Notice of Grant of Stock Option accompanying the Agreement, pursuant to which Optionee has been informed of the basic terms of the option evidenced hereby.

O. INCENTIVE OPTION shall mean an option which satisfies the requirements of Code Section 422.

P. MISCONDUCT shall mean the commission of any act of fraud, embezzlement or dishonesty by Optionee, any unauthorized use or disclosure by Optionee of confidential information or trade secrets of the Corporation (or any Parent or Subsidiary), or any other intentional misconduct by Optionee adversely affecting the business or affairs of the Corporation (or any Parent or Subsidiary) in a material manner. The foregoing definition shall not be deemed to be inclusive of all the acts or omissions which the Corporation (or any Parent or Subsidiary) may consider as grounds for the dismissal or discharge of Optionee or any other individual in the Service of the Corporation (or any Parent or Subsidiary).

A-2.

Q. NON-STATUTORY OPTION shall mean an option not intended to satisfy the requirements of Code Section 422.

R. NOTICE OF EXERCISE shall mean the notice of exercise in the form attached hereto as Exhibit I.

S. OPTION SHARES shall mean the number of shares of Common Stock subject to the option as specified in the Grant Notice.

T. OPTIONEE shall mean the person to whom the option is granted as specified in the Grant Notice.

U. PARENT shall mean any corporation (other than the Corporation) in an unbroken chain of corporations ending with the Corporation, provided each corporation in the unbroken chain (other than the Corporation) owns, at the time of the determination, stock possessing fifty percent (50%) or more of the total combined voting power of all classes of stock in one of the other corporations in such chain.

V. PERMANENT DISABILITY shall mean the inability of Optionee to engage in any substantial gainful activity by reason of any medically determinable physical or mental impairment which is expected to result in death or has lasted or can be expected to last for a continuous period of twelve (12) months or more.

W. PLAN shall mean the Corporation's 1996 Stock Option/Stock Issuance Plan.

X. PLAN ADMINISTRATOR shall mean either the Board or a committee of Board members, to the extent the committee is at the time responsible for the administration of the Plan.

Y. QUALIFIED DOMESTIC RELATIONS ORDER shall mean a Domestic Relations Order which substantially complies with the requirements of Code Section 414(p). The Plan Administrator shall have the sole discretion to determine whether a Domestic Relations Order is a Qualified Domestic Relations Order.

Z. SERVICE shall mean the Optionee's performance of services for the Corporation (or any Parent or Subsidiary) in the capacity of an Employee, a non-employee member of the board of directors or a consultant or independent advisor.

AA. STOCK EXCHANGE shall mean the American Stock Exchange or the New York Stock Exchange.

AB. SUBSIDIARY shall mean any corporation (other than the Corporation) in an unbroken chain of corporations beginning with the Corporation, provided each corporation (other than the last corporation) in the unbroken chain owns, at the time of the

A-3.

determination, stock possessing fifty percent (50%) or more of the total combined voting power of all classes of stock in one of the other corporations in such chain.

EXHIBIT 99.4

ADDENDUM
TO
STOCK OPTION AGREEMENT

The following provisions are hereby incorporated into, and are hereby made a part of, that certain Stock Option Agreement dated 2~ (the "Option Agreement") by and between CardioVascular Dynamics, Inc. (the "Corporation") and 1~ ("Optionee") evidencing the stock option granted on such date to Optionee under the terms of the Corporation's 1996 Stock Option/Stock Issuance Plan, and such provisions shall be effective immediately. All capitalized terms in this Addendum, to the extent not otherwise defined herein, shall have the meanings assigned to them in the Option Agreement.

LIMITED STOCK APPRECIATION RIGHT

1. Optionee is hereby granted a limited stock appreciation right in tandem with the option, exercisable upon the terms set forth below:

(i) Should a Hostile Take-Over occur at any time after the option has been outstanding for a period of at least six (6) months measured from the Effective Date of this Addendum indicated below, then Optionee shall have the unconditional right (exercisable during the thirty (30)-day period following such Hostile Take-Over) to surrender the option to the Corporation, to the extent the option is at the time exercisable for vested shares of Common Stock. In return for the surrendered option, Optionee shall receive a cash distribution from the Corporation in an amount equal to the excess of (A) the Take-Over Price of the shares of Common Stock which are at the time vested under the surrendered option (or surrendered portion) over (B) the aggregate Exercise Price payable for such shares.

(ii) To exercise this limited stock appreciation right, Optionee must, during the applicable thirty (30)-day exercise period, provide the Corporation with written notice of the option surrender in which there is specified the number of Option Shares as to which the option is being surrendered. Such notice must be accompanied by the return of Optionee's copy of the Option Agreement, together with any written amendments to such Agreement. The cash distribution shall be paid to Optionee within five (5) days following such delivery date, and neither the approval of the Plan Administrator nor the consent of the Board shall be required in connection with such option surrender and cash distribution. Upon receipt of such cash distribution, the option shall be cancelled with respect to the Option Shares for which the option has been surrendered, and Optionee shall cease to have any further right to acquire those Option Shares under the Option Agreement. The option shall, however, remain outstanding and exercisable for the balance of the Option Shares (if any) in accordance with the terms of the Option

Agreement, and the Corporation shall issue a new stock option agreement (substantially in the same form of the surrendered Option Agreement) for those remaining Option Shares.

(iii) In no event may this limited stock appreciation right be exercised when there is not a positive spread between the Fair Market Value of the Option Shares and the aggregate Exercise Price payable for such shares. This limited stock appreciation right shall in all events terminate upon the expiration or sooner termination of the option term and may not be assigned or transferred by Optionee.

2. For purposes of this Addendum, the following definitions shall be in effect:

(i) A HOSTILE TAKE-OVER shall be deemed to occur in the event (A) any person or related group of persons (other than the Corporation or a person that directly or indirectly controls, is controlled by, or is under common control with, the Corporation) directly or indirectly acquires beneficial ownership (within the meaning of Rule 13d-3 of the Securities Exchange Act of 1934, as amended) of securities possessing more than fifty percent (50%) of the total combined voting power of the Corporation's outstanding securities pursuant to a tender or exchange offer made directly to the Corporation's stockholders which the Board does not recommend such stockholders to accept, AND (B) more than fifty percent (50%) of the securities so acquired in such tender or exchange offer are accepted from holders other than the officers and directors of the Corporation subject to the short-swing profit restrictions of Section 16 of the Securities Exchange Act of 1934, as amended.

(ii) The TAKE-OVER PRICE per share shall be deemed to be equal to the greater of (A) the Fair Market Value per Option Share on the option surrender date or (B) the highest reported price per share of Common Stock paid by the tender offeror in effecting the Hostile Take-Over. However, if the surrendered option is designated as an Incentive Option in the Grant Notice, then the Take-Over Price shall not exceed the clause (A) price per share.

2.

IN WITNESS WHEREOF, CardioVascular Dynamics, Inc. has caused this Addendum to be executed by its duly-authorized officer, and Optionee has executed this Addendum, all as of the Effective Date specified below.

CARDIOVASCULAR DYNAMICS, INC.

By: _________________________________

Title: ______________________________

EFFECTIVE DATE: ________________, 199_

EXHIBIT 99.5

ADDENDUM
TO
STOCK OPTION AGREEMENT

The following provisions are hereby incorporated into, and are hereby made a part of, that certain Stock Option Agreement dated 2~ (the "Option Agreement") by and between CardioVascular Dynamics, Inc. (the "Corporation") and 1~ ("Optionee") evidencing the stock option (the "Option") granted on such date to Optionee under the terms of the Corporation's 1996 Stock Option/Stock Issuance Plan, and such provisions shall be effective immediately. All capitalized terms in this Addendum, to the extent not otherwise defined herein, shall have the meanings assigned to them in the Option Agreement.

INVOLUNTARY TERMINATION FOLLOWING
CORPORATE TRANSACTION

1. To the extent the Option is, in connection with a Corporate Transaction, to be assumed or replaced with a comparable option in accordance with Paragraph 6 of the Option Agreement, the Option shall not accelerate upon the occurrence of that Corporate Transaction, and the Option shall accordingly continue, over Optionee's period of Service after the Corporate Transaction, to become exercisable for the Option Shares in one or more installments in accordance with the provisions of the Option Agreement. However, immediately upon an Involuntary Termination of Optionee's Service within eighteen (18) months following such Corporate Transaction, the Option, to the extent outstanding at the time but not otherwise fully exercisable, shall automatically accelerate so that the Option shall become immediately exercisable for all the Option Shares at the time subject to the Option and may be exercised for any or all of those Option Shares as fully vested shares. The Option shall remain so exercisable until the earlier of (i) the Expiration Date or (ii) the expiration of the one (1)-year period measured from the date of the Involuntary Termination.

2. For purposes of this Addendum, an INVOLUNTARY TERMINATION shall mean the termination of Optionee's Service by reason of:

(i) Optionee's involuntary dismissal or discharge by the Corporation for reasons other than Misconduct, or

(ii) Optionee's voluntary resignation following (A) a change in Optionee's position with the Corporation (or Parent or Subsidiary employing Optionee) which materially reduces Optionee's level of responsibility, (B) a reduction in Optionee's level of compensation (including base salary, fringe benefits and participation in any corporate-performance based bonus or incentive programs) by more than fifteen percent (15%) or

(C) a relocation of Optionee's place of employment by more than fifty (50) miles, provided and only if such change, reduction or relocation is effected by the Corporation without Optionee's consent.

3. The provisions of Paragraph 1 of this Addendum shall govern the period for which the Option is to remain exercisable following the Involuntary Termination of Optionee's Service within eighteen (18) months after the Corporate Transaction and shall supersede any provisions to the contrary in the Option Agreement.

IN WITNESS WHEREOF, CardioVascular Dynamics, Inc. has caused this Addendum to be executed by its duly-authorized officer, and Optionee has executed this Addendum, all as of the Effective Date specified below.

CARDIOVASCULAR DYNAMICS, INC.

By: _____________________________________

Title: __________________________________

EFFECTIVE DATE: ____________________, 199_

EXHIBIT 99.6

ADDENDUM
TO
STOCK OPTION AGREEMENT

The following provisions are hereby incorporated into, and are hereby made a part of, that certain Stock Option Agreement dated 2~ (the "Option Agreement") by and between CardioVascular Dynamics, Inc. (the "Corporation") and 1~ ("Optionee") evidencing the stock option granted on such date to Optionee under the terms of the Corporation's 1996 Stock Option/Stock Issuance Plan, and such provisions shall be effective immediately. All capitalized terms in this Addendum, to the extent not otherwise defined herein, shall have the meanings assigned to them in the Option Agreement.

INVOLUNTARY TERMINATION FOLLOWING
CHANGE IN CONTROL

1. The exercisability of the option shall not accelerate upon the occurrence of a Change in Control, and the option shall, over Optionee's continued period of Service after the Change in Control, continue to become exercisable for the Option Shares in accordance with the provisions of the Option Agreement. However, immediately upon an Involuntary Termination of Optionee's Service within eighteen (18) months following the Change in Control, the exercisability of this option, to the extent the option is at the time outstanding but not otherwise fully exercisable, shall automatically accelerate so that the option shall immediately become fully exercisable for all the Option Shares at the time subject to the option and may be exercised for any or all of those shares as fully vested shares of Common Stock at any time prior to the earlier of (i) the Expiration Date or (ii) the expiration of the one (1)-year period measured from the date of the Involuntary Termination.

2. For purposes of this Addendum, an INVOLUNTARY TERMINATION shall mean the termination of Optionee's Service by reason of:

(i) Optionee's involuntary dismissal or discharge by the Corporation for reasons other than Misconduct, or

(ii) Optionee's voluntary resignation following (A) a change in Optionee's position with the Corporation (or Parent or Subsidiary employing Optionee) which materially reduces Optionee's level of responsibility, (B) a reduction in Optionee's level of compensation (including base salary, fringe benefits and participation in any corporate-performance based bonus or incentive programs) by more than fifteen percent (15%) or (C) a relocation of Optionee's place of employment by more than fifty (50) miles, provided and only if such change, reduction or relocation is effected by the Corporation without Optionee's consent.

3. For purposes of this Addendum, a CHANGE IN CONTROL shall be deemed to occur in the event of a change in ownership or control of the Corporation effected through either of the following transactions:

(i) the acquisition, directly or indirectly, by any person or related group of persons (other than the Corporation or a person that directly or indirectly controls, is controlled by, or is under common control with, the Corporation) of beneficial ownership (within the meaning of Rule 13d-3 of the Securities Exchange Act of 1934, as amended) of securities possessing more than fifty percent (50%) of the total combined voting power of the Corporation's outstanding securities pursuant to a tender or exchange offer made directly to the Corporation's stockholders which the Board does not recommend such stockholders to accept, or

(ii) a change in the composition of the Board over a period of thirty-six (36) consecutive months or less such that a majority of the Board members ceases by reason of one or more contested elections for Board membership, to be comprised of individuals who either (A) have been Board members continuously since the beginning of such period or (B) have been elected or nominated for election as Board members during such period by at least a majority of the Board members described in clause (A) who were still in office at the time such election or nomination was approved by the Board.

4. The provisions of Paragraph 1 of this Addendum shall govern the period for which the option is to remain exercisable following the Involuntary Termination of Optionee's Service within eighteen (18) months after the Change in Control and shall supersede any provisions to the contrary in the Option Agreement.

IN WITNESS WHEREOF, CardioVascular Dynamics, Inc. has caused this Addendum to be executed by its duly-authorized officer, and Optionee has executed this Addendum, all as of the Effective Date specified below.

CARDIOVASCULAR DYNAMICS, INC.

By: _____________________________________

Title: __________________________________

EFFECTIVE DATE: ____________________, 199_

EXHIBIT 99.7

ADDENDUM
TO
STOCK OPTION AGREEMENT

The following provisions are hereby incorporated into, and are hereby made a part of, that certain Stock Option Agreement dated 2~ (the "Option Agreement") by and between CardioVascular Dynamics, Inc. (the "Corporation") and 1~ ("Optionee") evidencing the non-statutory stock option granted on such date to Optionee under the terms of the Corporation's 1996 Stock Option/Stock Issuance Plan, and such provisions shall be effective immediately. Capitalized terms in this Addendum, to the extent not otherwise defined herein, shall have the meanings assigned to such terms in the Option Agreement.

SPECIAL TAX ELECTIONS

1. STOCK WITHHOLDING. Optionee is hereby granted the election to have the Corporation withhold, at the time the option is exercised, a portion of the purchased Option Shares with an aggregate Fair Market Value not to exceed one hundred percent (100%) of the applicable Federal, state and local income and employment tax withholding liability (the "Taxes") Optionee incurs in connection with the option exercise.

Any such exercise of the election must be effected in accordance with the following terms and conditions:

(i) The election must be made on or before the date the liability for the Taxes is determined (the "Tax Determination Date").

(ii) The election shall be irrevocable.

(iii) The election shall be subject to the approval of the Plan Administrator, and none of the Option Shares shall be withheld in satisfaction of the Taxes, except to the extent the election is approved by the Plan Administrator.

(iv) The Option Shares withheld pursuant to the election shall be valued at Fair Market Value on the Tax Determination Date.

(v) In no event may the number of shares of Common Stock requested to be withheld exceed in Fair Market Value the dollar amount of the Taxes.

If the stock withholding election is made by Optionee at a time when Optionee is an officer or director of the Corporation subject to the short-swing profit

restrictions of Section 16(b) of the Securities Exchange Act of 1934, as amended, then the following limitations, in addition to the preceding provisions, shall also be applicable:

(i) The election shall not become effective at any time prior to the expiration of the six (6)-month period measured from the Effective Date of this Addendum indicated below, and no Option Shares shall be withheld in connection with any Tax Determination Date which occurs before the expiration of such six (6)-month period.

(ii) The stock withholding election must be made in accordance with the following limitations:

(A) Such election must be made at least six (6) months before the Tax Determination Date, or

(B) Both the exercise of such election and the exercise of the option must occur concurrently within a quarterly "window" period. Quarterly window periods shall begin on the third (3rd) business day following the date of public release of each quarterly or annual statement of the Corporation's sales and earnings and end on the earlier of the twelfth (12th) business day following such release date or the Tax Determination Date.

2. STOCK DELIVERY. Optionee is hereby granted the election to deliver, at the time the option is exercised, one or more shares of Common Stock previously acquired by Optionee (other than in connection with the acquisition triggering the Taxes) with an aggregate Fair Market Value not to exceed one hundred percent (100%) of the Taxes.

Any such exercise of the election must be effected in accordance with the following terms and conditions:

(i) The election must be made on or before the Tax Determination Date for the Taxes.

(ii) The election shall be irrevocable.

(iii) The election shall be subject to the approval of the Plan Administrator, and none of the delivered shares of Common Stock shall be accepted in satisfaction of the Taxes, except to the extent the election is approved by the Plan Administrator.

(iv) The shares of Common Stock delivered in satisfaction of the Taxes shall be valued at Fair Market Value on the Tax Determination Date.

2.

(v) In no event may the number of delivered shares exceed in Fair Market Value the dollar amount of the Taxes.

IN WITNESS WHEREOF, CardioVascular Dynamics, Inc. has caused this Addendum to be executed by its duly-authorized officer, and Optionee has executed this Addendum, all as of the Effective Date specified below.

CARDIOVASCULAR DYNAMICS, INC.

By: _________________________________

Title: ______________________________

EFFECTIVE DATE: ____________, 199_

EXHIBIT 99.8

INITIAL GRANT

CARDIOVASCULAR DYNAMICS, INC.
NOTICE OF GRANT OF NON-EMPLOYEE DIRECTOR
AUTOMATIC STOCK OPTION

Notice is hereby given of the following option grant (the "Option") to purchase shares of the Common Stock of CardioVascular Dynamics, Inc. (the "Corporation"):

Optionee: _____________________________________________________________

Grant Date: ___________________________________________________________

Exercise Price: $_______________________ per share

Number of Option Shares: 5,000 shares

Expiration Date: ______________________________________________________

Type of Option: Non-Statutory Stock Option

Date Exercisable: Immediately Exercisable

Vesting Schedule: The Option Shares shall be unvested and subject to repurchase by the Corporation at the Exercise Price paid per share. Optionee shall acquire a vested interest in, and the Corporation's repurchase right will accordingly lapse with respect to the Option Shares in four (4) equal successive annual installments upon Optionee's completion of each year of service as a member of the Corporation's Board of Directors (the "Board") measured from the Grant Date. In no event shall any additional Option Shares vest after Optionee's cessation of Board service.

Optionee understands and agrees that the Option is granted subject to and in accordance with the terms of the automatic option grant program under the CardioVascular Dynamics, Inc. 1996 Stock Option/Stock Issuance Plan (the "Plan"). Optionee further agrees to be bound by the terms of the Plan and the terms of the Option as set forth in the Automatic Stock Option Agreement attached hereto as Exhibit A.

Optionee hereby acknowledges receipt of a copy of the official prospectus for the Plan in the form attached hereto as Exhibit B. A copy of the Plan is available upon request made to the Corporate Secretary at the Corporation's principal offices.

REPURCHASE RIGHT. OPTIONEE HEREBY AGREES THAT ALL OPTION SHARES ACQUIRED UPON THE EXERCISE OF THE OPTION SHALL BE SUBJECT TO A REPURCHASE RIGHT EXERCISABLE BY THE CORPORATION AND ITS ASSIGNS. THE TERMS OF SUCH RIGHT SHALL BE SPECIFIED IN A STOCK PURCHASE AGREEMENT, IN FORM AND SUBSTANCE SATISFACTORY TO THE CORPORATION, EXECUTED BY OPTIONEE AT THE TIME OF THE OPTION EXERCISE.

No Impairment of Rights. Nothing in this Notice or the attached Automatic Stock Option Agreement or in the Plan shall interfere with or otherwise restrict in any way the rights of the Corporation and the Corporation's stockholders to remove Optionee from the Board at any time in accordance with the provisions of applicable law.

Definitions. All capitalized terms in this Notice shall have the meaning assigned to them in this Notice or in the attached Automatic Stock Option Agreement.

________________, 199
Date

CARDIOVASCULAR DYNAMICS, INC.

By: _________________________________

Title: ______________________________

Address: ____________________________

ATTACHMENTS

Exhibit A - Automatic Stock Option Agreement Exhibit B - Plan Summary and Prospectus

2.

EXHIBIT A

AUTOMATIC STOCK OPTION AGREEMENT

EXHIBIT B

EXHIBIT 99.9

ANNUAL GRANT

CARDIOVASCULAR DYNAMICS, INC.
NOTICE OF GRANT OF NON-EMPLOYEE DIRECTOR
AUTOMATIC STOCK OPTION

Notice is hereby given of the following option grant (the "Option") to purchase shares of the Common Stock of CardioVascular Dynamics, Inc. (the "Corporation"):

Optionee: _____________________________________________________________

Grant Date: ___________________________________________________________

Exercise Price: $_______________________ per share

Number of Option Shares: 5,000 shares

Expiration Date: ______________________________________________________

Type of Option: Non-Statutory Stock Option

Date Exercisable: Immediately Exercisable

Vesting Schedule: The Option Shares shall be unvested and subject to repurchase by the Corporation at the Exercise Price paid per share. Optionee shall acquire a vested interest in, and the Corporation's repurchase right will accordingly lapse with respect to the Option Shares upon Optionee's completion of one (1) year of service as a member of the Corporation's Board of Directors (the "Board") measured from the Grant Date. In no event shall any additional Option Shares vest after Optionee's cessation of Board service.

Optionee understands and agrees that the Option is granted subject to and in accordance with the terms of the automatic option grant program under the CardioVascular Dynamics, Inc. 1996 Stock Option/Stock Issuance Plan (the "Plan"). Optionee further agrees to be bound by the terms of the Plan and the terms of the Option as set forth in the Automatic Stock Option Agreement attached hereto as Exhibit A.

Optionee hereby acknowledges receipt of a copy of the official prospectus for the Plan in the form attached hereto as Exhibit B. A copy of the Plan is available upon request made to the Corporate Secretary at the Corporation's principal offices.

REPURCHASE RIGHT. OPTIONEE HEREBY AGREES THAT ALL OPTION SHARES ACQUIRED UPON THE EXERCISE OF THE OPTION SHALL BE SUBJECT TO A REPURCHASE RIGHT EXERCISABLE BY THE CORPORATION AND ITS ASSIGNS. THE TERMS OF SUCH RIGHT SHALL BE SPECIFIED IN A STOCK PURCHASE AGREEMENT, IN FORM AND SUBSTANCE SATISFACTORY TO THE CORPORATION, EXECUTED BY OPTIONEE AT THE TIME OF THE OPTION EXERCISE.

No Impairment of Rights. Nothing in this Notice or the attached Automatic Stock Option Agreement or in the Plan shall interfere with or otherwise restrict in any way the rights of the Corporation and the Corporation's stockholders to remove Optionee from the Board at any time in accordance with the provisions of applicable law.

Definitions. All capitalized terms in this Notice shall have the meaning assigned to them in this Notice or in the attached Automatic Stock Option Agreement.

____________________, 199
Date

CARDIOVASCULAR DYNAMICS, INC.

By: _________________________________

Title: ______________________________

Address: ____________________________

ATTACHMENTS

Exhibit A - Automatic Stock Option Agreement Exhibit B - Plan Summary and Prospectus

2.

EXHIBIT A

AUTOMATIC STOCK OPTION AGREEMENT

EXHIBIT B

EXHIBIT 99.10

CARDIOVASCULAR DYNAMICS, INC.
AUTOMATIC STOCK OPTION AGREEMENT

RECITALS

A. The Corporation has implemented an automatic option grant program under the Plan pursuant to which eligible non-employee members of the Board will automatically receive special option grants at periodic intervals over their period of Board service in order to provide such individuals with a meaningful incentive to continue to serve as members of the Board.

B. Optionee is an eligible non-employee Board member, and this Agreement is executed pursuant to, and is intended to carry out the purposes of, the Plan in connection with the automatic grant of an option to purchase shares of Common Stock under the Plan.

C. All capitalized terms in this Agreement shall have the meaning assigned to them in the attached Appendix.

NOW, THEREFORE, it is hereby agreed as follows:

1. GRANT OF OPTION. The Corporation hereby grants to Optionee, as of the Grant Date, a Non-Statutory Option to purchase up to the number of Option Shares specified in the Grant Notice. The Option Shares shall be purchasable from time to time during the option term specified in Paragraph 2 at the Exercise Price.

2. OPTION TERM. This option shall have a term of ten (10) years measured from the Grant Date and shall accordingly expire at the close of business on the Expiration Date, unless sooner terminated in accordance with Paragraph 5, 6 or 7.

3. LIMITED TRANSFERABILITY. This option, together with the special stock appreciation right provided under Paragraph 7(b), shall be neither transferable nor assignable by Optionee other than by will or by the laws of descent and distribution following Optionee's death and may be exercised, during Optionee's lifetime, only by Optionee. However, this option may also be assigned in whole or in part during Optionee's lifetime in accordance with the terms of a Qualified Domestic Relations Order. The assigned portion shall be exercisable only by the person or persons who acquire a proprietary interest in the option pursuant to such Qualified Domestic Relations Order. The terms applicable to the assigned portion shall be the same as those in effect for this option immediately prior to such assignment and shall be set forth in such documents issued to the assignee as the Board may deem appropriate.

4. EXERCISABILITY/VESTING.

(a) This option shall be immediately exercisable for any or all of the Option Shares, whether or not the Option Shares are vested in accordance with the Vesting Schedule and shall remain so exercisable until the Expiration Date or sooner termination of the option term under Paragraph 5, 6 or 7.

(b) Optionee shall, in accordance with the Vesting Schedule, vest in the Option Shares in one or more installments over his or her period of Board service. Vesting in the Option Shares may be accelerated pursuant to the provisions of Paragraph 5, 6 or 7. In no event, however, shall any additional Option Shares vest following Optionee's cessation of service as a Board member.

5. CESSATION OF BOARD SERVICE. Should Optionee's service as a Board member cease while this option remains outstanding, then the option term specified in Paragraph 2 shall terminate (and this option shall cease to be outstanding) prior to the Expiration Date in accordance with the following provisions:

(a) Should Optionee cease to serve as a Board member for any reason (other than death or Permanent Disability) while holding this option, then the period for exercising this option shall be reduced to a twelve
(12)-month period (commencing with the date of such cessation of Board service), but in no event shall this option be exercisable at any time after the Expiration Date. During such limited period of exercisability, this option may not be exercised in the aggregate for more than the number of Option Shares (if any) in which Optionee is vested on the date Optionee ceases service as a Board member. Upon the earlier of (i) the expiration of such twelve (12)-month period or (ii) the specified Expiration Date, the option shall terminate and cease to be exercisable with respect to any vested Option Shares for which the option has not been exercised.

(b) Should Optionee die during the twelve (12)-month period following his or her cessation of Board service, then the personal representative of Optionee's estate or the person or persons to whom the option is transferred pursuant to Optionee's will or in accordance with the laws of descent and distribution shall have the right to exercise this option for any or all of the Option Shares in which Optionee is vested at the time of Optionee's cessation of Board service (less any Option Shares purchased by Optionee after such cessation of Board service but prior to death). Such right of exercise shall terminate, and this option shall accordingly cease to be exercisable for such vested Option Shares, upon the earlier of (i) the expiration of the twelve
(12)-month period measured from the date of Optionee's cessation of Board service or (ii) the specified Expiration Date.

(c) Should Optionee cease service as a Board member by reason of death or Permanent Disability, then all Option Shares at the time subject to this option but not otherwise vested shall vest in full so that Optionee (or the personal representative

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of Optionee's estate or the person or persons to whom the option is transferred upon Optionee's death) shall have the right to exercise this option for any or all of the Option Shares as fully-vested shares of Common Stock at any time prior to the earlier of (i) the expiration of the twelve (12)-month period measured from the date of Optionee's cessation of Board service or (ii) the specified Expiration Date.

(d) Upon Optionee's cessation of Board service for any reason other than death or Permanent Disability, this option shall immediately terminate and cease to be outstanding with respect to any and all Option Shares in which Optionee is not otherwise at that time vested in accordance with the normal Vesting Schedule or the special vesting acceleration provisions of Paragraph 6 or 7 below.

(e) In the event of a Corporate Transaction or Change in Control, the provisions of Paragraph 6 or 7 shall govern the period for which this option is to remain exercisable following Optionee's cessation of Board service and shall supersede any provisions to the contrary in this paragraph.

6. CORPORATE TRANSACTION.

(a) In the event of a Corporate Transaction, all Option Shares at the time subject to this option but not otherwise vested shall automatically vest so that this option shall, immediately prior to the effective date of such Corporate Transaction, become exercisable for any or all of the Option Shares as fully-vested shares of Common Stock. Immediately following the Corporate Transaction, this option shall terminate and cease to be exercisable except to the extent assumed by the successor corporation (or parent thereof) in connection with such Corporate Transaction.

(b) If this option is assumed in connection with a Corporate Transaction, then this option shall be appropriately adjusted, immediately after such Corporate Transaction, to apply to the number and class of securities which would have been issuable to Optionee in consummation of such Corporate Transaction had the option been exercised immediately prior to such Corporate Transaction, and appropriate adjustments shall also be made to the Exercise Price, provided the aggregate Exercise Price shall remain the same.

(c) This Agreement shall not in any way affect the right of the Corporation to adjust, reclassify, reorganize or otherwise change its capital or business structure or to merge, consolidate, dissolve, liquidate or sell or transfer all or any part of its business or assets.

7. CHANGE IN CONTROL/HOSTILE TAKE-OVER.

(a) All Option Shares subject to this option at the time of a Change in Control but not otherwise vested shall automatically vest so that this option shall,

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immediately prior to the effective date of such Change in Control, become fully exercisable for all of the Option Shares at the time subject to this option and may be exercised for all or any portion of such shares as fully-vested shares of Common Stock. This option shall remain exercisable for such fully-vested Option Shares until the earliest to occur of (i) the Expiration Date, (ii) the sooner termination of this option in accordance with Paragraph 5 or 6 or (iii) the surrender of the option in connection with a Hostile Take-Over.

(b) Provided this option has been outstanding for at least six
(6) months prior to the occurrence of a Hostile Take-Over, Optionee shall have the unconditional right (exercisable during the thirty (30)-day period immediately following the consummation of such Hostile Take-Over) to surrender this option to the Corporation in exchange for a cash distribution from the Corporation in an amount equal to the excess of (i) the Take-Over Price of the Option Shares at the time subject to the surrendered option (whether or not those Option Shares are otherwise at the time vested) over (ii) the aggregate Exercise Price payable for such shares. This Paragraph 7(b) limited stock appreciation right shall in all events terminate upon the expiration or sooner termination of the option term and may not be assigned or transferred by Optionee.

(c) To exercise the Paragraph 7(b) limited stock appreciation right, Optionee must, during the applicable thirty (30)-day exercise period, provide the Corporation with written notice of the option surrender in which there is specified the number of Option Shares as to which the Option is being surrendered. Such notice must be accompanied by the return of Optionee's copy of this Agreement, together with any written amendments to such Agreement. The cash distribution shall be paid to Optionee within five (5) days following such delivery date, and no approval or consent of the Board shall be required in connection with such option surrender and cash distribution. Upon receipt of such cash distribution, this option shall be cancelled with respect to the Option Shares subject to the surrendered option (or the surrendered portion) and Optionee shall cease to have any further right to acquire those Option Shares under this Agreement. The option shall, however, remain outstanding for the balance of the Option Shares (if any) in accordance with the terms of this Agreement, and the Corporation shall issue a new stock option agreement (substantially in the same form as this Agreement) for those remaining Option Shares.

8. ADJUSTMENT IN OPTION SHARES. Should any change be made to the Common Stock by reason of any stock split, stock dividend, recapitalization, combination of shares, exchange of shares or other change affecting the outstanding Common Stock as a class without the Corporation's receipt of consideration, appropriate adjustments shall be made to (i) the total number and/or class of securities subject to this option and (ii) the Exercise Price in order to reflect such change and thereby preclude a dilution or enlargement of benefits hereunder.

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9. STOCKHOLDER RIGHTS. The holder of this option shall not have any stockholder rights with respect to the Option Shares until such person shall have exercised the option, paid the Exercise Price and become a holder of record of the purchased shares.

10. MANNER OF EXERCISING OPTION.

(a) In order to exercise this option with respect to all or any part of the Option Shares for which this option is at the time exercisable, Optionee (or any other person or persons exercising the option) must take the following actions:

(i) To the extent the option is exercised for vested Option Shares, execute and deliver to the Corporation a Notice of Exercise for the Option Shares for which the option is exercised. To the extent this option is exercised for unvested Option Shares, execute and deliver to the Corporation a Purchase Agreement.

(ii) Pay the aggregate Exercise Price for the purchased shares in one or more of the following forms:

(A) cash or check made payable to the Corporation,

(B) shares of Common Stock held by Optionee (or any other person or persons exercising the option) for the requisite period necessary to avoid a charge to the Corporation's earnings for financial reporting purposes and valued at Fair Market Value on the Exercise Date, or

(C) to the extent the option is exercised for vested Option Shares, through a special sale and remittance procedure pursuant to which Optionee (or any other person or persons exercising the option) shall concurrently provide irrevocable written instructions (I) to a Corporation-designated brokerage firm to effect the immediate sale of the purchased shares and remit to the Corporation, out of the sale proceeds available on the settlement date, sufficient funds to cover the aggregate Exercise Price payable for the purchased shares plus all applicable Federal, state and local income and employment taxes required to be withheld by the Corporation by reason of such exercise and (II) to the Corporation to deliver the certificates for the purchased shares directly to such brokerage firm in order to complete the sale.

Except to the extent the sale and remittance procedure is utilized in connection with the option exercise, payment of the Exercise Price must accompany the Notice of Exercise (or the Purchase

5.

Agreement) delivered to the Corporation in connection with the option exercise.

(iii) Furnish to the Corporation appropriate documentation that the person or persons exercising the option (if other than Optionee) have the right to exercise this option.

(b) As soon after the Exercise Date as practical, the Corporation shall issue to or on behalf of Optionee (or any other person or persons exercising this option) a certificate for the purchased Option Shares, with the appropriate legends affixed thereto. To the extent any such Option Shares are unvested, the certificates for those Option Shares shall be endorsed with an appropriate legend evidencing the Corporation's repurchase rights and may be held in escrow with the Corporation until such shares vest.

(c) In no event may this option be exercised for any fractional shares.

11. COMPLIANCE WITH LAWS AND REGULATIONS.

(a) The exercise of this option and the issuance of the Option Shares upon such exercise shall be subject to compliance by the Corporation and Optionee with all applicable requirements of law relating thereto and with all applicable regulations of any stock exchange (or the Nasdaq National Market, if applicable) on which the Common Stock may be listed for trading at the time of such exercise and issuance.

(b) The inability of the Corporation to obtain approval from any regulatory body having authority deemed by the Corporation to be necessary to the lawful issuance and sale of any Common Stock pursuant to this option shall relieve the Corporation of any liability with respect to the non-issuance or sale of the Common Stock as to which such approval shall not have been obtained. The Corporation, however, shall use its best efforts to obtain all such approvals.

12. SUCCESSORS AND ASSIGNS. Except to the extent otherwise provided in Paragraph 3 or 6, the provisions of this Agreement shall inure to the benefit of, and be binding upon, the Corporation and its successors and assigns and Optionee, Optionee's assigns and the legal representatives, heirs and legatees of Optionee's estate.

13. NOTICES. Any notice required to be given or delivered to the Corporation under the terms of this Agreement shall be in writing and addressed to the Corporation at its principal corporate offices. Any notice required to be given or delivered to Optionee shall be in writing and addressed to Optionee at the address indicated below Optionee's signature line on the Grant Notice. All notices shall be deemed effective upon personal delivery or upon deposit in the U.S. mail, postage prepaid and properly addressed to the party to be notified.

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14. CONSTRUCTION. This Agreement and the option evidenced hereby are made and granted pursuant to the Plan and are in all respects limited by and subject to the terms of the Plan.

15. GOVERNING LAW. The interpretation, performance and enforcement of this Agreement shall be governed by the laws of the State of California without resort to that State's conflict-of-laws rules.

7.

EXHIBIT I

NOTICE OF EXERCISE

I hereby notify CardioVascular Dynamics, Inc. (the "Corporation") that I elect to purchase shares of the Corporation's Common Stock (the "Purchased Shares") at the option exercise price of $ per share (the "Exercise Price") pursuant to that certain option (the "Option") granted to me under the Corporation's 1996 Stock Option/Stock Issuance Plan on , 199 .

Concurrently with the delivery of this Exercise Notice to the Corporation, I shall hereby pay to the Corporation the Exercise Price for the Purchased Shares in accordance with the provisions of my agreement with the Corporation (or other documents) evidencing the Option and shall deliver whatever additional documents may be required by such agreement as a condition for exercise. Alternatively, I may utilize the special broker-dealer sale and remittance procedure specified in my agreement to effect payment of the Exercise Price for any Purchased Shares in which I am vested at the time of exercise of the Option.

_________________________, 199_
Date

Print name in exact manner
it is to appear on the
stock certificate:                  ____________________________________________

Address to which certificate
is to be sent, if different
from address above:                 ____________________________________________

                                    ____________________________________________

Social Security Number:             ____________________________________________

APPENDIX

The following definitions shall be in effect under the Agreement:

A. AGREEMENT shall mean this Automatic Stock Option Agreement.

B. BOARD shall mean the Corporation's Board of Directors.

C. CHANGE IN CONTROL shall mean a change in ownership or control of the Corporation effected through either of the following transactions:

(i) the acquisition, directly or indirectly, by any person or related group of persons (other than the Corporation or a person that directly or indirectly controls, is controlled by, or is under common control with, the Corporation) of beneficial ownership (within the meaning of Rule 13d-3 of the 1934 Act) of securities possessing more than fifty percent (50%) of the total combined voting power of the Corporation's outstanding securities pursuant to a tender or exchange offer made directly to the Corporation's stockholders which the Board does not recommend such stockholders to accept, or

(ii) a change in the composition of the Board over a period of thirty-six (36) consecutive months or less such that a majority of the Board members ceases, by reason of one or more contested elections for Board membership, to be comprised of individuals who either (A) have been Board members continuously since the beginning of such period or (B) have been elected or nominated for election as Board members during such period by at least a majority of the Board members described in clause (A) who were still in office at the time the Board approved such election or nomination.

D. CODE shall mean the Internal Revenue Code of 1986, as amended.

E. COMMON STOCK shall mean the Corporation's common stock.

F. CORPORATE TRANSACTION shall mean either of the following stockholder-approved transactions to which the Corporation is a party:

(i) a merger or consolidation in which securities possessing more than fifty percent (50%) of the total combined voting power of the Corporation's outstanding securities are transferred to a person or persons different from the persons holding those securities immediately prior to such transaction, or

A-1.

(ii) the sale, transfer or other disposition of all or substantially all of the Corporation's assets in complete liquidation or dissolution of the Corporation.

G. CORPORATION shall mean CardioVascular Dynamics, Inc., a Delaware corporation.

H. DOMESTIC RELATIONS ORDER shall mean any judgment, decree or order (including approval of a property settlement agreement) which provides or otherwise conveys, pursuant to applicable State domestic relations laws (including community property laws), marital property rights to any spouse or former spouse of Optionee.

I. EXERCISE DATE shall mean the date on which the option shall have been exercised in accordance with Paragraph 10 of the Agreement.

J. EXERCISE PRICE shall mean the exercise price per share as specified in the Grant Notice.

K. EXPIRATION DATE shall mean the date on which the option expires as specified in the Grant Notice.

L. FAIR MARKET VALUE per share of Common Stock on any relevant date shall be determined in accordance with the following provisions:

(i) If the Common Stock is at the time traded on the Nasdaq National Market, then the Fair Market Value shall be the closing selling price per share of Common Stock on the date in question, as the price is reported by the National Association of Securities Dealers on the Nasdaq National Market or any successor system. If there is no closing selling price for the Common Stock on the date in question, then the Fair Market Value shall be the closing selling price on the last preceding date for which such quotation exists.

(ii) If the Common Stock is at the time listed on any Stock Exchange, then the Fair Market Value shall be the closing selling price per share of Common Stock on the date in question on the Stock Exchange which serves as the primary market for the Common Stock, as such price is officially quoted in the composite tape of transactions on such exchange. If there is no closing selling price for the Common Stock on the date in question, then the Fair Market Value shall be the closing selling price on the last preceding date for which such quotation exists.

M. GRANT DATE shall mean the date of grant of the option as specified in the Grant Notice.

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N. GRANT NOTICE shall mean the Notice of Grant of Automatic Stock Option accompanying the Agreement, pursuant to which Optionee has been informed of the basic terms of the option evidenced hereby.

O. HOSTILE TAKE-OVER shall mean a change in ownership of the Corporation effected through the following transaction:

(i) the acquisition, directly or indirectly, by any person or related group of persons (other than the Corporation or a person that directly or indirectly controls, is controlled by, or is under common control with, the Corporation) of beneficial ownership (within the meaning of Rule 13d-3 of the 1934 Act) of securities possessing more than fifty percent (50%) of the total combined voting power of the Corporation's outstanding securities pursuant to a tender or exchange offer made directly to the Corporation's stockholders which the Board does not recommend such stockholders to accept, and

(ii) more than fifty percent (50%) of the acquired securities are accepted from persons other than the officers and directors of the Corporation subject to the short-swing profit restrictions of Section 16 of the 1934 Act.

P. 1934 ACT shall mean the Securities Exchange Act of 1934, as amended.

Q. NON-STATUTORY OPTION shall mean an option not intended to satisfy the requirements of Code Section 422.

R. NOTICE OF EXERCISE shall mean the notice of exercise in the form of Exhibit I.

S. OPTION SHARES shall mean the number of shares of Common Stock subject to the option.

T. OPTIONEE shall mean the person to whom the option is granted as specified in the Grant Notice.

U. PERMANENT DISABILITY shall mean the inability of Optionee to perform his or her usual duties as a member of the Board by reason of any medically determinable physical or mental impairment which is expected to result in death or has lasted or can be expected to last for a continuous period of twelve (12) months or more.

V. PLAN shall mean the Corporation's 1996 Stock Option/Stock Issuance Plan.

W. PURCHASE AGREEMENT shall mean the stock purchase agreement (in form and substance satisfactory to the Corporation) which grants the Corporation the right to

A-3.

repurchase, at the Exercise Price, any and all unvested Option Shares held by Optionee at the time of Optionee's cessation of Board service and which precludes the sale, transfer or other disposition of any purchased Option Shares while subject to such repurchase right.

X. QUALIFIED DOMESTIC RELATIONS ORDER shall mean a Domestic Relations Order which substantially complies with the requirements of Code Section 414(p). The Corporation shall have the sole discretion to determine whether a Domestic Relations Order is a Qualified Domestic Relations Order.

Y. STOCK EXCHANGE shall mean the American Stock Exchange or the New York Stock Exchange.

Z. TAKE-OVER PRICE shall mean the greater of (i) the Fair Market Value per share of Common Stock on the date the option is surrendered to the Corporation in connection with a Hostile Take-Over or (ii) the highest reported price per share of Common Stock paid by the tender offeror in effecting the Hostile Take-Over.

AA. VESTING SCHEDULE shall mean the vesting schedule specified in the Grant Notice.

EXHIBIT 99.11

CARDIOVASCULAR DYNAMICS, INC.
STOCK ISSUANCE AGREEMENT

AGREEMENT made as of this day of 19 , by and between CardioVascular Dynamics, Inc., a Delaware corporation and _______________________, a Participant in the Corporation's 1996 Stock Option/Stock Issuance Plan.

All capitalized terms in this Agreement shall have the meaning assigned to them in this Agreement or in the attached Appendix.

A. PURCHASE OF SHARES

1. PURCHASE. Participant hereby purchases unvested shares of Common Stock (the "Purchased Shares") pursuant to the provisions of the Stock Issuance Program at the purchase price of $______ per share (the "Purchase Price").

2. PAYMENT. Concurrently with the delivery of this Agreement to the Corporation, Participant shall pay the Purchase Price for the Purchased Shares in cash or check payable to the Corporation and shall deliver a duly-executed blank Assignment Separate from Certificate (in the form attached hereto as Exhibit I) with respect to the Purchased Shares.

3. DELIVERY OF CERTIFICATES. The certificates representing any Purchased Shares shall be held in escrow in accordance with the provisions of this Agreement.

4. STOCKHOLDER RIGHTS. Until such time as the Corporation exercises the Repurchase Right, Participant (or any successor in interest) shall have all the rights of a stockholder (including voting, dividend and liquidation rights) with respect to the Purchased Shares, subject, however, to the transfer restrictions of Article B.

5. COMPLIANCE WITH LAW. Under no circumstances shall shares of Common Stock or other assets be issued or delivered to Participant pursuant to the provisions of this Agreement unless, in the opinion of counsel for the Corporation or its successors, there shall have been compliance with all applicable requirements of the Federal and state securities laws, all applicable listing requirements of any stock exchange (or the Nasdaq National Market if applicable) on which the Common Stock is at the time listed for trading and all other requirements of law or of any regulatory bodies having jurisdiction over such issuance and delivery.

B. TRANSFER RESTRICTIONS

1. RESTRICTION ON TRANSFER. Except for any Permitted Transfer, Participant shall not transfer, assign, encumber or otherwise dispose of any of the Purchased Shares which are subject to the Repurchase Right.

2. RESTRICTIVE LEGEND. The stock certificates for the Purchased Shares shall be endorsed with the following restrictive legend:

"The shares represented by this certificate are unvested and are subject to a repurchase right granted to the Corporation and accordingly may not be sold, assigned, transferred, encumbered, or in any manner disposed of except in conformity with the terms of a written agreement dated , 199 between the Corporation and the registered holder of the shares (or the predecessor in interest to the shares). A copy of such agreement is maintained at the Corporation's principal corporate offices."

3. TRANSFEREE OBLIGATIONS. Each person (other than the Corporation) to whom the Purchased Shares are transferred by means of a Permitted Transfer must, as a condition precedent to the validity of such transfer, acknowledge in writing to the Corporation that such person is bound by the provisions of this Agreement and that the transferred shares are subject to the Repurchase Right to the same extent such shares would be so subject if retained by Participant.

C. REPURCHASE RIGHT

1. GRANT. The Corporation is hereby granted the right (the "Repurchase Right"), exercisable at any time during the ninety (90)-day period following the date Participant ceases for any reason to remain in Service, to repurchase at the Purchase Price all or any portion of the Purchased Shares in which Participant is not, at the time of his or her cessation of Service, vested in accordance with the Vesting Schedule (such shares to be hereinafter referred to as the "Unvested Shares").

2. EXERCISE OF THE REPURCHASE RIGHT. The Repurchase Right shall be exercisable by written notice delivered to each Owner of the Unvested Shares prior to the expiration of the ninety (90)-day exercise period. The notice shall indicate the number of Unvested Shares to be repurchased and the date on which the repurchase is to be effected, such date to be not more than thirty (30) days after the date of such notice. The certificates representing the Unvested Shares to be repurchased shall be delivered to the Corporation prior to the close of business on the date specified for the repurchase. Concurrently with the receipt of such stock certificates, the Corporation shall pay to Owner, in cash or cash equivalents (including the cancellation of any purchase-money indebtedness), an amount equal to the Purchase Price previously paid for the Unvested Shares which are to be repurchased from Owner.

2.

3. TERMINATION OF THE REPURCHASE RIGHT. The Repurchase Right shall terminate with respect to any Unvested Shares for which it is not timely exercised under Paragraph C.2. In addition, the Repurchase Right shall terminate and cease to be exercisable with respect to any and all Purchased Shares in which Participant vests in accordance with the following Vesting Schedule:

(i) Upon Participant's completion of one (1) year of Service measured from ______________, 199__, Participant shall acquire a vested interest in, and the Repurchase Right shall lapse with respect to, twenty-five percent (25%) of the Purchased Shares.

(ii) Participant shall acquire a vested interest in, and the Repurchase Right shall lapse with respect to, the remaining Purchased Shares in successive equal monthly installments upon Participant's completion of each additional month of Service over the thirty-six
(36)-month period measured from the initial vesting date under subparagraph (i) above.

4. RECAPITALIZATION. Any new, substituted or additional securities or other property (including cash paid other than as a regular cash dividend) which is by reason of any Recapitalization distributed with respect to the Purchased Shares shall be immediately subject to the Repurchase Right, but only to the extent the Purchased Shares are at the time covered by such right. Appropriate adjustments to reflect such distribution shall be made to the number and/or class of Purchased Shares subject to this Agreement and to the price per share to be paid upon the exercise of the Repurchase Right in order to reflect the effect of any such Recapitalization upon the Corporation's capital structure; provided, however, that the aggregate purchase price shall remain the same.

5. CORPORATE TRANSACTION.

(a) Immediately prior to the consummation of any Corporate Transaction, the Repurchase Right shall automatically lapse in its entirety, except to the extent the Repurchase Right is assigned to the successor corporation (or parent thereof) in connection with the Corporate Transaction.

(b) To the extent the Repurchase Right remains in effect following a Corporate Transaction, such right shall apply to the new capital stock or other property (including any cash payments) received in exchange for the Purchased Shares in consummation of the Corporate Transaction, but only to the extent the Purchased Shares are at the time covered by such right. Appropriate adjustments shall be made to the price per share payable upon exercise of the Repurchase Right to reflect the effect of the Corporate Transaction upon the Corporation's capital structure; provided, however, that the aggregate purchase price shall remain the same.

3.

D. ESCROW

1. DEPOSIT. Upon issuance, the certificates for the Purchased Shares shall be deposited in escrow with the Corporation to be held in accordance with the provisions of this Article D. Each deposited certificate shall be accompanied by a duly-executed Assignment Separate from Certificate in the form of Exhibit I. The deposited certificates, together with any other assets or securities from time to time deposited with the Corporation pursuant to the requirements of this Agreement, shall remain in escrow until such time or times as the certificates (or other assets and securities) are to be released or otherwise surrendered for cancellation in accordance with Paragraph D.3. Upon delivery of the certificates (or other assets and securities) to the Corporation, Owner shall be issued a receipt acknowledging the number of Purchased Shares (or other assets and securities) delivered in escrow.

2. RECAPITALIZATION/REORGANIZATION. Any new, substituted or additional securities or other property which is by reason of any Recapitalization or Reorganization distributed with respect to the Purchased Shares shall be immediately delivered to the Corporation to be held in escrow under this Article D, but only to the extent the Purchased Shares are at the time subject to the escrow requirements hereunder. However, all regular cash dividends on the Purchased Shares (or other securities at the time held in escrow) shall be paid directly to Owner and shall not be held in escrow.

3. RELEASE/SURRENDER. The Purchased Shares, together with any other assets or securities held in escrow hereunder, shall be subject to the following terms relating to their release from escrow or their surrender to the Corporation for repurchase and cancellation:

(i) Should the Corporation elect to exercise the Repurchase Right with respect to any Unvested Shares, then the escrowed certificates for those Unvested Shares (together with any other assets or securities attributable thereto) shall be surrendered to the Corporation concurrently with the payment to Owner of an amount equal to the aggregate Purchase Price paid for those Unvested Shares, and Owner shall cease to have any further rights or claims with respect to such Unvested Shares (or other assets or securities attributable thereto).

(ii) Should the Corporation elect not to exercise the Repurchase Right with respect to any Unvested Shares held at the time in escrow hereunder, then the escrowed certificates for those shares (together with any other assets or securities attributable thereto) shall be released to Owner.

(iii) As the Purchased Shares (or any other assets or securities attributable thereto) vest in accordance with the Vesting Schedule, the

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certificates for those vested shares (as well as all other vested assets and securities) shall be released from escrow upon Owner's request.

(iv) Upon any earlier termination of the Repurchase Right in connection with a Corporate Transaction, any Purchased Shares (or other assets or securities) at the time held in escrow hereunder shall promptly be released to Owner.

E. SPECIAL TAX ELECTION

1. SECTION 83(B) ELECTION . Under Code Section 83, the excess of the fair market value of the Purchased Shares on the date any forfeiture restrictions applicable to such shares lapse over the Purchase Price paid for such shares will be reportable as ordinary income on the lapse date. For this purpose, the term "forfeiture restrictions" includes the right of the Corporation to repurchase the Purchased Shares pursuant to the Repurchase Right. Participant may elect under Code Section 83(b) to be taxed at the time the Purchased Shares are acquired, rather than when and as such Purchased Shares cease to be subject to such forfeiture restrictions. Such election must be filed with the Internal Revenue Service within thirty (30) days after the date of this Agreement. Even if the fair market value of the Purchased Shares on the date of this Agreement equals the Purchase Price paid (and thus no tax is payable), the election must be made to avoid adverse tax consequences in the future. THE FORM FOR MAKING THIS ELECTION IS ATTACHED AS EXHIBIT II HERETO. PARTICIPANT UNDERSTANDS THAT FAILURE TO MAKE THIS FILING WITHIN THE APPLICABLE THIRTY
(30)-DAY PERIOD WILL RESULT IN THE RECOGNITION OF ORDINARY INCOME AS THE FORFEITURE RESTRICTIONS LAPSE.

2. FILING RESPONSIBILITY. PARTICIPANT ACKNOWLEDGES THAT IT IS PARTICIPANT'S SOLE RESPONSIBILITY, AND NOT THE CORPORATION'S, TO FILE A TIMELY ELECTION UNDER CODE SECTION 83(B), EVEN IF PARTICIPANT REQUESTS THE CORPORATION OR ITS REPRESENTATIVES TO MAKE THIS FILING ON HIS OR HER BEHALF.

F. GENERAL PROVISIONS

1. ASSIGNMENT. The Corporation may assign the Repurchase Right to any person or entity selected by the Board, including (without limitation) one or more stockholders of the Corporation.

2. NO EMPLOYMENT OR SERVICE CONTRACT. Nothing in this Agreement or in the Plan shall confer upon Participant any right to continue in Service for any period of specific duration or interfere with or otherwise restrict in any way the rights of the Corporation (or any Parent or Subsidiary employing or retaining Participant) or of

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Participant, which rights are hereby expressly reserved by each, to terminate Participant's Service at any time for any reason, with or without cause.

3. NOTICES. Any notice required to be given under this Agreement shall be in writing and shall be deemed effective upon personal delivery or upon deposit in the U.S. mail, registered or certified, postage prepaid and properly addressed to the party entitled to such notice at the address indicated below such party's signature line on this Agreement or at such other address as such party may designate by ten (10) days advance written notice under this paragraph to all other parties to this Agreement.

4. NO WAIVER. The failure of the Corporation in any instance to exercise the Repurchase Right shall not constitute a waiver of any other repurchase rights that may subsequently arise under the provisions of this Agreement or any other agreement between the Corporation and Participant. No waiver of any breach or condition of this Agreement shall be deemed to be a waiver of any other or subsequent breach or condition, whether of like or different nature.

5. CANCELLATION OF SHARES. If the Corporation shall make available, at the time and place and in the amount and form provided in this Agreement, the consideration for the Purchased Shares to be repurchased in accordance with the provisions of this Agreement, then from and after such time, the person from whom such shares are to be repurchased shall no longer have any rights as a holder of such shares (other than the right to receive payment of such consideration in accordance with this Agreement). Such shares shall be deemed purchased in accordance with the applicable provisions hereof, and the Corporation shall be deemed the owner and holder of such shares, whether or not the certificates therefor have been delivered as required by this Agreement.

6. GOVERNING LAW. This Agreement shall be governed by, and construed in accordance with, the laws of the State of California without resort to that State's conflict-of-laws rules.

7. SUCCESSORS AND ASSIGNS. The provisions of this Agreement shall inure to the benefit of, and be binding upon, the Corporation and its successors and assigns and upon Participant, Participant's assigns and the legal representatives, heirs and legatees of Participant's estate, whether or not any such person shall have become a party to this Agreement and have agreed in writing to join herein and be bound by the terms hereof.

6.

IN WITNESS WHEREOF, the parties have executed this Agreement on the day and year first indicated above.

CARDIOVASCULAR DYNAMICS, INC.

By: _____________________________________

Title: __________________________________

Address: ________________________________

Address: ________________________________

7.

EXHIBIT I

ASSIGNMENT SEPARATE FROM CERTIFICATE

FOR VALUE RECEIVED _____________ hereby sell(s), assign(s) and transfer(s) unto CardioVascular Dynamics, Inc. (the "Corporation"),_____________ (___) shares of the Common Stock of the Corporation standing in his or her name on the books of the Corporation represented by Certificate No. ____________ herewith and do(es) hereby irrevocably constitute and appoint ________________ Attorney to transfer the said stock on the books of the Corporation with full power of substitution in the premises.

Dated: ______________

Signature __________________________

INSTRUCTION: Please do not fill in any blanks other than the signature line. Please sign exactly as you would like your name to appear on the issued stock certificate. The purpose of this assignment is to enable the Corporation to exercise the Repurchase Right without requiring additional signatures on the part of Participant.

EXHIBIT II

SECTION 83(B) TAX ELECTION

This statement is being made under Section 83(b) of the Internal Revenue Code, pursuant to Treas. Reg. Section 1.83-2.

(1) The taxpayer who performed the services is:

Name:
Address:
Taxpayer Ident. No.:

(2) The property with respect to which the election is being made is __________ shares of the common stock of CardioVascular Dynamics, Inc.

(3) The property was issued on _______________, 199__.

(4) The taxable year in which the election is being made is the calendar year 199__.

(5) The property is subject to a repurchase right pursuant to which the issuer has the right to acquire the property at the original purchase price if for any reason taxpayer's employment with the issuer is terminated. The issuer's repurchase right lapses in a series of installments over a four (4)-year period ending on_____________, 199__.

(6) The fair market value at the time of transfer (determined without regard to any restriction other than a restriction which by its terms will never lapse) is $_________ per share.

(7) The amount paid for such property is $__________________ per share.

(8) A copy of this statement was furnished to CardioVascular Dynamics, Inc. for whom taxpayer rendered the services underlying the transfer of property.

(9) This statement is executed on ________________________, 199__.

This election must be filed with the Internal Revenue Service Center with which taxpayer files his or her Federal income tax returns and must be made within thirty (30) days after the execution date of the Stock Issuance Agreement. This filing should be made by registered or certified mail, return receipt requested. Participant must retain two (2) copies of the completed form for filing with his or her Federal and state tax returns for the current tax year and an additional copy for his or her records.

APPENDIX

The following definitions shall be in effect under the Agreement:

A. AGREEMENT shall mean this Stock Issuance Agreement.

B. BOARD shall mean the Corporation's Board of Directors.

C. CODE shall mean the Internal Revenue Code of 1986, as amended.

D. COMMON STOCK shall mean the Corporation's common stock.

E. CORPORATE TRANSACTION shall mean either of the following stockholder-approved transactions:

(i) a merger or consolidation in which securities possessing more than fifty percent (50%) of the total combined voting power of the Corporation's outstanding securities are transferred to a person or persons different from the persons holding those securities immediately prior to such transaction, or

(ii) the sale, transfer or other disposition of all or substantially all of the Corporation's assets in complete liquidation or dissolution of the Corporation.

F. CORPORATION shall mean CardioVascular Dynamics, Inc., a Delaware corporation.

G. MISCONDUCT shall mean the commission of any act of fraud, embezzlement or dishonesty by Participant, any unauthorized use or disclosure by Participant of confidential information or trade secrets of the Corporation (or any Parent or Subsidiary), or any other intentional misconduct by Participant adversely affecting the business or affairs of the Corporation (or any Parent or Subsidiary) in a material manner. The foregoing definition shall not be deemed to be inclusive of all the acts or omissions which the Corporation (or any Parent or Subsidiary) may consider as grounds for the dismissal or discharge of Participant or any other person in the Service of the Corporation (or any Parent or Subsidiary).

H. OWNER shall mean Participant and all subsequent holders of the Purchased Shares who derive their chain of ownership through a Permitted Transfer from Participant.

I. PARENT shall mean any corporation (other than the Corporation) in an unbroken chain of corporations ending with the Corporation, provided each corporation in

A-1.

the unbroken chain (other than the Corporation) owns, at the time of the determination, stock possessing fifty percent (50%) or more of the total combined voting power of all classes of stock in one of the other corporations in such chain.

J. PARTICIPANT shall mean the person to whom shares are issued under the Stock Issuance Program.

K. PERMITTED TRANSFER shall mean (i) a gratuitous transfer of the Purchased Shares, provided and only if Participant obtains the Corporation's prior written consent to such transfer, (ii) a transfer of title to the Purchased Shares effected pursuant to Participant's will or the laws of intestate succession following Participant's death or (iii) a transfer to the Corporation in pledge as security for any purchase-money indebtedness incurred by Participant in connection with the acquisition of the Purchased Shares.

L. PLAN shall mean the Corporation's 1996 Stock Option/Stock Issuance Plan.

M. PLAN ADMINISTRATOR shall mean either the Board or a committee of Board members, to the extent the committee is at the time responsible for administration of the Plan.

N. PURCHASE PRICE shall have the meaning assigned to such term in Paragraph A.1.

O. PURCHASED SHARES shall have the meaning assigned to such term in Paragraph A.1.

P. RECAPITALIZATION shall mean any stock split, stock dividend, recapitalization, combination of shares, exchange of shares or other change affecting the outstanding Common Stock as a class without the Corporation's receipt of consideration.

Q. REORGANIZATION shall mean any of the following transactions:

(i) a merger or consolidation in which the Corporation is not the surviving entity,

(ii) a sale, transfer or other disposition of all or substantially all of the Corporation's assets,

(iii) a reverse merger in which the Corporation is the surviving entity but in which the Corporation's outstanding voting securities are transferred in whole or in part to a person or persons different from the persons holding those securities immediately prior to the merger, or

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(iv) any transaction effected primarily to change the state in which the Corporation is incorporated or to create a holding company structure.

R. REPURCHASE RIGHT shall mean the right granted to the Corporation in accordance with Article C.

S. SERVICE shall mean the Participant's performance of services for the Corporation (or any Parent or Subsidiary) in the capacity of an employee, subject to the control and direction of the employer entity as to both the work to be performed and the manner and method of performance, a non-employee member of the board of directors or a consultant or independent advisor.

T. STOCK ISSUANCE PROGRAM shall mean the Stock Issuance Program under the Plan.

U. SUBSIDIARY shall mean any corporation (other than the Corporation) in an unbroken chain of corporations beginning with the Corporation, provided each corporation (other than the last corporation) in the unbroken chain owns, at the time of the determination, stock possessing fifty percent (50%) or more of the total combined voting power of all classes of stock in one of the other corporations in such chain.

V. VESTING SCHEDULE shall mean the vesting schedule specified in Paragraph C.3.

W. UNVESTED SHARES shall have the meaning assigned to such term in Paragraph C.1.

EXHIBIT 99.12

CARDIOVASCULAR DYNAMICS, INC.
EMPLOYEE STOCK PURCHASE PLAN

I. PURPOSE OF THE PLAN

This Employee Stock Purchase Plan is intended to promote the interests of CardioVascular Dynamics, Inc. by providing eligible employees with the opportunity to acquire a proprietary interest in the Corporation through participation in a payroll-deduction based employee stock purchase plan designed to qualify under Section 423 of the Code.

Capitalized terms herein shall have the meanings assigned to such terms in the attached Appendix.

II. ADMINISTRATION OF THE PLAN

The Plan Administrator shall have full authority to interpret and construe any provision of the Plan and to adopt such rules and regulations for administering the Plan as it may deem necessary in order to comply with the requirements of Code Section 423. Decisions of the Plan Administrator shall be final and binding on all parties having an interest in the Plan.

III. STOCK SUBJECT TO PLAN

The stock purchasable under the Plan shall be shares of authorized but unissued or reacquired Common Stock, including shares of Common Stock purchased on the open market. The maximum number of shares of Common Stock which may be issued over the term of the Plan shall not exceed Two Hundred Thousand (200,000) shares.

Should any change be made to the Common Stock by reason of any stock split, stock dividend, recapitalization, combination of shares, exchange of shares or other change affecting the outstanding Common Stock as a class without the Corporation's receipt of consideration, appropriate adjustments shall be made to (i) the maximum number and class of securities issuable under the Plan, (ii) the maximum number and class of securities purchasable per Participant on any one Purchase Date and (iii) the number and class of securities and the price per share in effect under each outstanding purchase right in order to prevent the dilution or enlargement of benefits thereunder.

IV. OFFERING PERIODS

Shares of Common Stock shall be offered for purchase under the Plan through a series of successive offering periods until such time as (i) the maximum number of shares of Common Stock available for issuance under the Plan shall have been purchased or (ii) the Plan shall have been sooner terminated.

B. Each offering period shall be of such duration (not to exceed twenty-four (24) months) as determined by the Plan Administrator prior to the start date. The initial offering period shall commence at the Effective Time and terminate on the last business day in July 1998. The next offering period shall commence on the first business day in August 1998, and subsequent offering periods shall commence as designated by the Plan Administrator.

C. Each offering period shall be comprised of a series of one or more successive Purchase Intervals. Purchase Intervals shall run from the first business day in February each year to the last business day in July of the same year and from the first business day in August each year to the last business day in January of the following year. However, the first Purchase Interval in effect under the initial offering period shall commence at the Effective Time and terminate on the last business day in January 1997.

D. Should the Fair Market Value per share of Common Stock on any Purchase Date within an offering period be less than the Fair Market Value per share of Common Stock on the start date of that offering period, then that offering period shall automatically terminate immediately after the purchase of shares of Common Stock on such Purchase Date, and a new offering period shall commence on the next business day following such Purchase Date. The new offering period shall have a duration of twenty four (24) months, unless a shorter duration is established by the Plan Administrator within five (5) business days following the start date of that offering period.

V. ELIGIBILITY

A. Each individual who is an Eligible Employee on the start date of any offering period under the Plan may enter that offering period on such start date or on any subsequent Semi-Annual Entry Date within that offering period, provided he or she remains an Eligible Employee.

B. Each individual who first becomes an Eligible Employee after the start date of an offering period may enter that offering period on any subsequent Semi-Annual Entry Date within that offering period on which he or she is an Eligible Employee.

C. The date an individual enters an offering period shall be designated his or her Entry Date for purposes of that offering period.

D. To participate in the Plan for a particular offering period, the Eligible Employee must complete the enrollment forms prescribed by the Plan Administrator (including a stock purchase agreement and a payroll deduction authorization) and file such forms with the Plan Administrator (or its designate) on or before his or her scheduled Entry Date.

2.

VI. PAYROLL DEDUCTIONS

A. The payroll deduction authorized by the Participant for purposes of acquiring shares of Common Stock during an offering period may be any multiple of one percent (1%) of the Base Salary paid to the Participant during each Purchase Interval within that offering period, up to a maximum of ten percent (10%). The deduction rate so authorized shall continue in effect throughout the offering period, except to the extent such rate is changed in accordance with the following guidelines:

(i) The Participant may, at any time during the offering period, reduce his or her rate of payroll deduction to become effective as soon as possible after filing the appropriate form with the Plan Administrator. The Participant may not, however, effect more than one
(1) such reduction per Purchase Interval.

(ii) The Participant may, prior to the commencement of any new Purchase Interval within the offering period, increase the rate of his or her payroll deduction by filing the appropriate form with the Plan Administrator. The new rate (which may not exceed the ten percent (10%) maximum) shall become effective on the start date of the first Purchase Interval following the filing of such form.

B. Payroll deductions shall begin on the first pay day following the Participant's Entry Date into the offering period and shall (unless sooner terminated by the Participant) continue through the pay day ending with or immediately prior to the last day of that offering period. The amounts so collected shall be credited to the Participant's book account under the Plan, but no interest shall be paid on the balance from time to time outstanding in such account. The amounts collected from the Participant shall not be held in any segregated account or trust fund and may be commingled with the general assets of the Corporation and used for general corporate purposes.

C. Payroll deductions shall automatically cease upon the termination of the Participant's purchase right in accordance with the provisions of the Plan.

D. The Participant's acquisition of Common Stock under the Plan on any Purchase Date shall neither limit nor require the Participant's acquisition of Common Stock on any subsequent Purchase Date, whether within the same or a different offering period.

VII. PURCHASE RIGHTS

A. GRANT OF PURCHASE RIGHT. A Participant shall be granted a separate purchase right for each offering period in which he or she participates. The purchase right shall be granted on the Participant's Entry Date into the offering period and shall provide the Participant with the right to purchase shares of Common Stock, in a series of successive

3.

installments over the remainder of such offering period, upon the terms set forth below. The Participant shall execute a stock purchase agreement embodying such terms and such other provisions (not inconsistent with the Plan) as the Plan Administrator may deem advisable.

Under no circumstances shall purchase rights be granted under the Plan to any Eligible Employee if such individual would, immediately after the grant, own (within the meaning of Code Section 424(d)) or hold outstanding options or other rights to purchase, stock possessing five percent (5%) or more of the total combined voting power or value of all classes of stock of the Corporation or any Corporate Affiliate.

B. EXERCISE OF THE PURCHASE RIGHT. Each purchase right shall be automatically exercised in installments on each successive Purchase Date within the offering period, and shares of Common Stock shall accordingly be purchased on behalf of each Participant (other than Participants whose payroll deductions have previously been refunded pursuant to the Termination of Purchase Right provisions below) on each such Purchase Date. The purchase shall be effected by applying the Participant's payroll deductions for the Purchase Interval ending on such Purchase Date to the purchase of whole shares of Common Stock at the purchase price in effect for the Participant for that Purchase Date.

C. PURCHASE PRICE. The purchase price per share at which Common Stock will be purchased on the Participant's behalf on each Purchase Date within the offering period shall not be less than eighty-five percent (85%) of the lower of (i) the Fair Market Value per share of Common Stock on the Participant's Entry Date into that offering period or (ii) the Fair Market Value per share of Common Stock on that Purchase Date.

D. NUMBER OF PURCHASABLE SHARES. The number of shares of Common Stock purchasable by a Participant on each Purchase Date during the offering period shall be the number of whole shares obtained by dividing the amount collected from the Participant through payroll deductions during the Purchase Interval ending with that Purchase Date by the purchase price in effect for the Participant for that Purchase Date. However, the maximum number of shares of Common Stock purchasable per Participant on any one Purchase Date shall not exceed nine hundred fifty (950) shares, subject to periodic adjustments in the event of certain changes in the Corporation's capitalization.

E. EXCESS PAYROLL DEDUCTIONS. Any payroll deductions not applied to the purchase of shares of Common Stock on any Purchase Date because they are not sufficient to purchase a whole share of Common Stock shall be held for the purchase of Common Stock on the next Purchase Date. However, any payroll deductions not applied to the purchase of Common Stock by reason of the limitation on the maximum number of shares purchasable by the Participant on the Purchase Date shall be promptly refunded.

F. TERMINATION OF PURCHASE RIGHT. The following provisions shall govern the termination of outstanding purchase rights:

4.

(i) A Participant may, at any time prior to the next scheduled Purchase Date in the offering period, terminate his or her outstanding purchase right by filing the appropriate form with the Plan Administrator (or its designate), and no further payroll deductions shall be collected from the Participant with respect to the terminated purchase right. Any payroll deductions collected during the Purchase Interval in which such termination occurs shall, at the Participant's election, be immediately refunded or held for the purchase of shares on the next Purchase Date. If no such election is made at the time such purchase right is terminated, then the payroll deductions collected with respect to the terminated right shall be refunded as soon as possible.

(ii) The termination of such purchase right shall be irrevocable, and the Participant may not subsequently rejoin the offering period for which the terminated purchase right was granted. In order to resume participation in any subsequent offering period, such individual must re-enroll in the Plan (by making a timely filing of the prescribed enrollment forms) on or before his or her scheduled Entry Date into that offering period.

(iii) Should the Participant cease to remain an Eligible Employee for any reason (including death, disability or change in status) while his or her purchase right remains outstanding, then that purchase right shall immediately terminate, and all of the Participant's payroll deductions for the Purchase Interval in which the purchase right so terminates shall be immediately refunded. However, should the Participant cease to remain in active service by reason of an approved unpaid leave of absence, then the Participant shall have the right, exercisable up until the last business day of the Purchase Interval in which such leave commences, to (a) withdraw all the payroll deductions collected to date on his or her behalf for that Purchase Interval or
(b) have such funds held for the purchase of shares on his or her behalf on the next scheduled Purchase Date. In no event, however, shall any further payroll deductions be collected on the Participant's behalf during such leave. Upon the Participant's return to active service, his or her payroll deductions under the Plan shall automatically resume at the rate in effect at the time the leave began, unless the Participant withdraws from the Plan prior to his or her return.

G. CORPORATE TRANSACTION. Each outstanding purchase right shall automatically be exercised, immediately prior to the effective date of any Corporate Transaction, by applying the payroll deductions of each Participant for the Purchase Interval in which such Corporate Transaction occurs to the purchase of whole shares of Common Stock at a purchase price per share not less than eighty-five percent (85%) of the lower of (i) the Fair Market Value per share of Common Stock on the Participant's Entry Date into the offering period in which such Corporate Transaction occurs or (ii) the Fair Market

5.

Value per share of Common Stock immediately prior to the effective date of such Corporate Transaction. However, the applicable limitation on the number of shares of Common Stock purchasable per Participant shall continue to apply to any such purchase.

The Corporation shall use its best efforts to provide at least ten
(10)-days prior written notice of the occurrence of any Corporate Transaction, and Participants shall, following the receipt of such notice, have the right to terminate their outstanding purchase rights prior to the effective date of the Corporate Transaction.

H. PRORATION OF PURCHASE RIGHTS. Should the total number of shares of Common Stock to be purchased pursuant to outstanding purchase rights on any particular date exceed the number of shares then available for issuance under the Plan, the Plan Administrator shall make a pro-rata allocation of the available shares on a uniform and nondiscriminatory basis, and the payroll deductions of each Participant, to the extent in excess of the aggregate purchase price payable for the Common Stock pro-rated to such individual, shall be refunded.

I. ASSIGNABILITY. The purchase right shall be exercisable only by the Participant and shall not be assignable or transferable by the Participant.

J. STOCKHOLDER RIGHTS. A Participant shall have no stockholder rights with respect to the shares subject to his or her outstanding purchase right until the shares are purchased on the Participant's behalf in accordance with the provisions of the Plan and the Participant has become a holder of record of the purchased shares.

VIII. ACCRUAL LIMITATIONS

A. No Participant shall be entitled to accrue rights to acquire Common Stock pursuant to any purchase right outstanding under this Plan if and to the extent such accrual, when aggregated with (i) rights to purchase Common Stock accrued under any other purchase right granted under this Plan and (ii) similar rights accrued under other employee stock purchase plans (within the meaning of Code Section 423) of the Corporation or any Corporate Affiliate, would otherwise permit such Participant to purchase more than Twenty-Five Thousand Dollars ($25,000) worth of stock of the Corporation or any Corporate Affiliate (determined on the basis of the Fair Market Value per share on the date or dates such rights are granted) for each calendar year such rights are at any time outstanding.

B. For purposes of applying such accrual limitations to the purchase rights granted under the Plan, the following provisions shall be in effect:

(i) The right to acquire Common Stock under each outstanding purchase right shall accrue in a series of installments on each successive Purchase Date during the offering period on which such right remains outstanding.

6.

(ii) No right to acquire Common Stock under any outstanding purchase right shall accrue to the extent the Participant has already accrued in the same calendar year the right to acquire Common Stock under one (1) or more other purchase rights at a rate equal to Twenty-Five Thousand Dollars ($25,000) worth of Common Stock (determined on the basis of the Fair Market Value per share on the date or dates of grant) for each calendar year such rights were at any time outstanding.

C. If by reason of such accrual limitations, any purchase right of a Participant does not accrue for a particular Purchase Interval, then the payroll deductions which the Participant made during that Purchase Interval with respect to such purchase right shall be promptly refunded.

D. In the event there is any conflict between the provisions of this Article and one or more provisions of the Plan or any instrument issued thereunder, the provisions of this Article shall be controlling.

IX. EFFECTIVE DATE AND TERM OF THE PLAN

A. The Plan was adopted by the Board on April 30, 1996 and shall become effective at the Effective Time, provided no purchase rights granted under the Plan shall be exercised, and no shares of Common Stock shall be issued hereunder, until (i) the Plan shall have been approved by the stockholders of the Corporation and (ii) the Corporation shall have complied with all applicable requirements of the 1933 Act (including the registration of the shares of Common Stock issuable under the Plan on a Form S-8 registration statement filed with the Securities and Exchange Commission), all applicable listing requirements of any stock exchange (or the Nasdaq National Market, if applicable) on which the Common Stock is listed for trading and all other applicable requirements established by law or regulation. In the event such stockholder approval is not obtained, or such compliance is not effected, within twelve (12) months after the date on which the Plan is adopted by the Board, the Plan shall terminate and have no further force or effect, and all sums collected from Participants during the initial offering period hereunder shall be refunded.

B. Unless sooner terminated by the Board, the Plan shall terminate upon the earliest of (i) the last business day in July 2006, (ii) the date on which all shares available for issuance under the Plan shall have been sold pursuant to purchase rights exercised under the Plan or (iii) the date on which all purchase rights are exercised in connection with a Corporate Transaction. No further purchase rights shall be granted or exercised, and no further payroll deductions shall be collected, under the Plan following such termination.

7.

X. AMENDMENT OF THE PLAN

The Board may alter, amend, suspend or discontinue the Plan at any time to become effective immediately following the close of any Purchase Interval. However, the Board may not, without the approval of the Corporation's stockholders, (i) materially increase the number of shares of Common Stock issuable under the Plan or the maximum number of shares purchasable per Participant on any one Purchase Date, except for permissible adjustments in the event of certain changes in the Corporation's capitalization, (ii) alter the purchase price formula so as to reduce the purchase price payable for the shares of Common Stock purchasable under the Plan or (iii) materially increase the benefits accruing to Participants under the Plan or materially modify the requirements for eligibility to participate in the Plan.

XI. GENERAL PROVISIONS

A. All costs and expenses incurred in the administration of the Plan shall be paid by the Corporation.

B. Nothing in the Plan shall confer upon the Participant any right to continue in the employ of the Corporation or any Corporate Affiliate for any period of specific duration or interfere with or otherwise restrict in any way the rights of the Corporation (or any Corporate Affiliate employing such person) or of the Participant, which rights are hereby expressly reserved by each, to terminate such person's employment at any time for any reason, with or without cause.

C. The provisions of the Plan shall be governed by the laws of the State of California without resort to that State's conflict-of-laws rules.

8.

SCHEDULE A

CORPORATIONS PARTICIPATING IN
EMPLOYEE STOCK PURCHASE PLAN
AS OF THE EFFECTIVE TIME

CARDIOVASCULAR DYNAMICS, INC.

APPENDIX

The following definitions shall be in effect under the Plan:

A. BASE SALARY shall mean the (i) regular base salary paid to a Participant by one or more Participating Companies during such individual's period of participation in one or more offering periods under the Plan plus (ii) any pre-tax contributions made by the Participant to any Code Section 401(k) salary deferral plan or any Code Section 125 cafeteria benefit program now or hereafter established by the Corporation or any Corporate Affiliate. The following items of compensation shall not be included in Base Salary: (i) all overtime payments, bonuses, commissions (other than those functioning as base salary equivalents), profit-sharing distributions and other incentive-type payments and (ii) any and all contributions (other than Code Section 401(k) or Code Section 125 contributions) made on the Participant's behalf by the Corporation or any Corporate Affiliate under any employee benefit or welfare plan now or hereafter established.

B. BOARD shall mean the Corporation's Board of Directors.

C. CODE shall mean the Internal Revenue Code of 1986, as amended.

D. COMMON STOCK shall mean the Corporation's common stock.

E. CORPORATE AFFILIATE shall mean any parent or subsidiary corporation of the Corporation (as determined in accordance with Code Section 424), whether now existing or subsequently established.

F. CORPORATE TRANSACTION shall mean either of the following stockholder-approved transactions to which the Corporation is a party:

(i) a merger or consolidation in which securities possessing more than fifty percent (50%) of the total combined voting power of the Corporation's outstanding securities are transferred to a person or persons different from the persons holding those securities immediately prior to such transaction, or

(ii) the sale, transfer or other disposition of all or substantially all of the assets of the Corporation in complete liquidation or dissolution of the Corporation.

G. CORPORATION shall mean CardioVascular Dynamics, Inc., a Delaware corporation, and any corporate successor to all or substantially all of the assets or voting stock of CardioVascular Dynamics, Inc. which shall by appropriate action adopt the Plan.

A-1.

H. EFFECTIVE TIME shall mean the time at which the Underwriting Agreement is executed and finally priced. Any Corporate Affiliate which becomes a Participating Corporation after such Effective Time shall designate a subsequent Effective Time with respect to its employee-Participants.

I. ELIGIBLE EMPLOYEE shall mean any person who is employed by a Participating Corporation on a basis under which he or she is regularly expected to render more than twenty (20) hours of service per week for more than five (5) months per calendar year for earnings considered wages under Code Section 3401(a).

J. ENTRY DATE shall mean the date an Eligible Employee first commences participation in the offering period in effect under the Plan. The earliest Entry Date under the Plan shall be the Effective Time.

K. FAIR MARKET VALUE per share of Common Stock on any relevant date shall be determined in accordance with the following provisions:

(i) If the Common Stock is at the time traded on the Nasdaq National Market, then the Fair Market Value shall be the closing selling price per share of Common Stock on the date in question, as such price is reported by the National Association of Securities Dealers on the Nasdaq National Market or any successor system. If there is no closing selling price for the Common Stock on the date in question, then the Fair Market Value shall be the closing selling price on the last preceding date for which such quotation exists.

(ii) If the Common Stock is at the time listed on any Stock Exchange, then the Fair Market Value shall be the closing selling price per share of Common Stock on the date in question on the Stock Exchange determined by the Plan Administrator to be the primary market for the Common Stock, as such price is officially quoted in the composite tape of transactions on such exchange. If there is no closing selling price for the Common Stock on the date in question, then the Fair Market Value shall be the closing selling price on the last preceding date for which such quotation exists.

(iii) For purposes of the initial offering period which begins at the Effective Time, the Fair Market Value shall be deemed to be equal to the price per share at which the Common Stock is sold in the initial public offering pursuant to the Underwriting Agreement.

L. 1933 ACT shall mean the Securities Act of 1933, as amended.

A-2.

M. PARTICIPANT shall mean any Eligible Employee of a Participating Corporation who is actively participating in the Plan.

N. PARTICIPATING CORPORATION shall mean the Corporation and such Corporate Affiliate or Affiliates as may be authorized from time to time by the Board to extend the benefits of the Plan to their Eligible Employees. The Participating Corporations in the Plan as of the Effective Time are listed in attached Schedule A.

O. PLAN shall mean the Corporation's Employee Stock Purchase Plan, as set forth in this document.

P. PLAN ADMINISTRATOR shall mean the committee of two (2) or more Board members appointed by the Board to administer the Plan.

Q. PURCHASE DATE shall mean the last business day of each Purchase Interval. The initial Purchase Date shall be January 30, 1997.

R. PURCHASE INTERVAL shall mean each successive six (6)-month period within the offering period at the end of which there shall be purchased shares of Common Stock on behalf of each Participant.

S. SEMI-ANNUAL ENTRY DATE shall mean the first business day in February and August each year on which an Eligible Employee may first enter an offering period.

T. STOCK EXCHANGE shall mean either the American Stock Exchange or the New York Stock Exchange.

U. UNDERWRITING AGREEMENT shall mean the agreement between the Corporation and the underwriter or underwriters managing the initial public offering of the Common Stock.