CARDIAC PATHWAYS CORP
S-8, 1997-10-16
ELECTROMEDICAL & ELECTROTHERAPEUTIC APPARATUS
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<PAGE>   1
        AS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON OCTOBER 16, 1997
                                                           REGISTRATION NO. 333-
================================================================================


                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                             ----------------------

                                    FORM S-8
                             REGISTRATION STATEMENT
                                      UNDER
                           THE SECURITIES ACT OF 1933

                             ----------------------


                          CARDIAC PATHWAYS CORPORATION
             (EXACT NAME OF REGISTRANT AS SPECIFIED IN ITS CHARTER)

                             ----------------------


        DELAWARE                                        77-0278793
(STATE OF INCORPORATION)                 (I.R.S. EMPLOYER IDENTIFICATION NO.)

                               995 BENECIA AVENUE
                           SUNNYVALE, CALIFORNIA 94086
   (ADDRESS, INCLUDING ZIP CODE, OF REGISTRANT'S PRINCIPAL EXECUTIVE OFFICES)

                             ----------------------


                        1996 EMPLOYEE STOCK PURCHASE PLAN
                            1996 DIRECTOR OPTION PLAN
                                 1991 STOCK PLAN
                            (FULL TITLE OF THE PLAN)

                             ----------------------


                               WILLIAM N. STARLING
                      PRESIDENT AND CHIEF EXECUTIVE OFFICER
                          CARDIAC PATHWAYS CORPORATION
                               995 BENECIA AVENUE
                           SUNNYVALE, CALIFORNIA 94086
                                 (408) 737-0505
       (NAME, ADDRESS, AND TELEPHONE NUMBER, INCLUDING AREA CODE, OF AGENT
                                  FOR SERVICE)

                             ----------------------


                                   COPIES TO:
                             CHRIS F. FENNELL, ESQ.
                        WILSON SONSINI GOODRICH & ROSATI
                            PROFESSIONAL CORPORATION
                               650 PAGE MILL ROAD
                               PALO ALTO, CA 94304
                                 (650) 493-9300
                             ----------------------




<PAGE>   2

                         CALCULATION OF REGISTRATION FEE


<TABLE>
<CAPTION>
==========================================================================================================================
                                                                           Proposed          Proposed
                                                                            Maximum           Maximum          Amount of
           Title of Each Class of                   Amount to be         Offering Price       Aggregate       Registration
        Securities to be Registered                  Registered            Per Share       Offering Price          Fee
- --------------------------------------------------------------------------------------------------------------------------
<S>                                              <C>                      <C>               <C>                <C>
Common Stock, $0.001 par value (1).........       400,000 shares (2)       $ 8.3125(3)       $ 3,325,000        $  1,008
Common Stock, $0.001 par value (1).........        70,000 shares (4)       $ 7.0656(5)       $   494,592        $    150
==========================================================================================================================
TOTAL                                                                                                           $  1,158
==========================================================================================================================
</TABLE>

(1)  Includes Preferred Share Purchase Rights which, prior to the occurrence of
     certain events, will not be exercisable or evidenced separately from the
     Common Stock.

(2)  This subtotal represents the number of shares being registered pursuant to
     this Registration Statement which are issuable upon exercise of options
     that have not yet been granted under the 1996 Director Option Plan and the
     1991 Stock Plan as of the date of this Registration Statement. Of the total
     of 400,000 shares that will be issuable upon the exercise of such options
     to be granted in the future, 20,000 shares will be issuable upon exercise
     of options to be granted in the future under the 1996 Director Option Plan
     and 380,000 shares will be issuable upon exercise of options to be granted
     in the future under the 1991 Stock Plan.

(3)  Estimated in accordance with Rule 457(h) solely for the purpose of
     computing the amount of the registration fee. Computation based upon the
     average of the high and low prices for the Registrant's Common Stock as 
     reported on The Nasdaq National Market on October 10, 1997.

(4)  This subtotal represents the number of shares being registered pursuant to
     this Registration Statement which are authorized to be issued under the
     1996 Employee Stock Purchase Plan.

(5)  Estimated in accordance with Rule 457(h) under the Securities Act of 1933
     solely for the purpose of calculating the total registration fee.
     Computation based upon 85% (see explanation in following sentence) of the
     average of the high and low prices of the Registrant's Common Stock as
     reported in The Nasdaq National Market on October 10, 1997. Pursuant to the
     1996 Employee Stock Purchase Plan, which plan is incorporated by reference
     herein, the purchase price of a share of Common Stock shall be an amount
     equal to 85% of the Fair Market Value of a share of Registrant's Common
     Stock on the Enrollment Date or the Exercise Date (as defined in such
     Plan), whichever is lower.

================================================================================
<PAGE>   3


          The contents of the Registrant's Form S-8 Registration Statement
(Registration No. 333-07629) as filed with the Commission on July 3, 1996, is
incorporated herein by reference.


ITEM 8.     EXHIBITS.

           Exhibit
            Number       Document


             4.1         1996 Employee Stock Purchase Plan, as amended.

             4.2         1991 Stock Plan, as amended.

             4.3         1996 Director Option Plan, as amended.

             5.1         Opinion of Wilson Sonsini Goodrich & Rosati, a
                         Professional Corporation.

             23.1        Consent of Ernst & Young LLP, Independent Auditors.

             23.2        Consent of Counsel (contained in Exhibit 5.1).

             24.1        Power of Attorney (see page II-2).






<PAGE>   4

                                   SIGNATURES


                  Pursuant to the requirements of the Securities Act of 1933,
the Registrant, Cardiac Pathways Corporation, a corporation organized and
existing under the laws of the State of Delaware, certifies that it has
reasonable grounds to believe that it meets all of the requirements for filing
on Form S-8 and has duly caused this Registration Statement to be signed on its
behalf by the undersigned, thereunto duly authorized, in the City of Sunnyvale,
State of California, on this 16th day of October, 1997.


                                     CARDIAC PATHWAYS CORPORATION



                                     By: /s/ William N. Starling
                                        --------------------------------------
                                         William N. Starling,
                                         President and Chief Executive Officer
                                         (Principal Executive Officer)


                                POWER OF ATTORNEY

                  KNOW ALL PERSONS BY THESE PRESENTS, that each such person
whose signature appears below constitutes and appoints, jointly and severally,
William N. Starling and David W. Gryska as his or her attorneys-in-fact, each
with the power of substitution, for him or her in any and all capacities, to
sign any amendments to this Registration Statement on Form S-8 (including
post-effective amendments), and to file the same, with all exhibits thereto, and
other documents in connection therewith, with the Securities and Exchange
Commission, hereby ratifying and confirming all that each of said
attorneys-in-fact, or his substitute or substitutes, may do or cause to be done
by virtue hereof.

                  PURSUANT TO THE REQUIREMENTS OF THE SECURITIES ACT OF 1933,
THIS REGISTRATION STATEMENT HAS BEEN SIGNED BY THE FOLLOWING PERSONS IN THE
CAPACITIES AND ON THE DATES INDICATED.

<TABLE>
<CAPTION>
          SIGNATURE                               TITLE                              DATE
- -------------------------------------     -----------------------------         ----------------
<S>                                      <C>                                   <C>
/s/ William N. Starling
- -------------------------------------     President, Chief Executive            October 16, 1997
(William N. Starling)                     Officer and Director                  
                                          (Principal Executive
                                          Officer)
/s/ David W. Gryska                        
- -------------------------------------     Vice President and Chief              October 16, 1997
(David W. Gryska)                         Financial Officer (Principal
                                          Financial and Accounting
                                          Officer)
/s/ Annette J. Campbell-White             Director                              October 16, 1997
- -------------------------------------     
(Annette J. Campbell-White)               
                                          
/s/ Michael L. Eagle                      Director                              October 16, 1997
- -------------------------------------     
(Michael L. Eagle)                        

- -------------------------------------     Director                              
(Thomas J. Fogarty, M.D.)                 
                                          
/s/ Joseph P. Ilvento, M.D.               Director                              October 16, 1997
- -------------------------------------     
(Joseph P. Ilvento, M.D.)                 
                                          
/s/ Lawrence G. Mohr, Jr.                 Director                              October 16, 1997
- -------------------------------------     
(Lawrence G. Mohr, Jr.)                   
</TABLE>



                                      II-2




<PAGE>   5

                                INDEX TO EXHIBITS



   EXHIBIT
    NUMBER                                      EXHIBIT
   -------                                      -------

     4.1       1996 Employee Stock Purchase Plan, as amended.

     4.2       1991 Stock Plan, as amended.

     4.3       1996 Director Option Plan, as amended.

     5.1       Opinion of Wilson Sonsini Goodrich & Rosati, a Professional
               Corporation.

     23.1      Consent of Ernst & Young LLP, Independent Auditors.

     23.2      Consent of Counsel (contained in Exhibit 5.1).

     24.1      Power of Attorney (see page II-2).














<PAGE>   1
                                                                     Exhibit 4.1

                          CARDIAC PATHWAYS CORPORATION

                       1996 EMPLOYEE STOCK PURCHASE PLAN


         The following constitute the provisions of the 1996 Employee Stock
Purchase Plan of Cardiac Pathways Corporation.

         1.      Purpose.  The purpose of the Plan is to provide employees of
the Company and its Designated Subsidiaries with an opportunity to purchase
Common Stock of the Company through accumulated payroll deductions.  It is the
intention of the Company to have the Plan qualify as an "Employee Stock
Purchase Plan" under Section 423 of the Internal Revenue Code of 1986, as
amended.  The provisions of the Plan, accordingly, shall be construed so as to
extend and limit participation in a manner consistent with the requirements of
that section of the Code.

         2.      Definitions.

                 (a)      "Board" shall mean the Board of Directors of the
Company.

                 (b)      "Code" shall mean the Internal Revenue Code of 1986,
as amended.

                 (c)      "Common Stock" shall mean the Common Stock of the
Company.

                 (d)      "Company" shall mean Cardiac Pathways Corporation and
any Designated Subsidiary of the Company.

                 (e)      "Compensation" shall mean all W-2 compensation.

                 (f)      "Designated Subsidiaries" shall mean the Subsidiaries
which have been designated by the Board from time to time in its sole
discretion as eligible to participate in the Plan.

                 (g)      "Employee" shall mean any individual who is an
Employee of the Company for tax purposes whose customary employment with the
Company is at least twenty (20) hours per week and more than five (5) months in
any calendar year.  For purposes of the Plan, the employment relationship shall
be treated as continuing intact while the individual is on sick leave or other
leave of absence approved by the Company.  Where the period of leave exceeds 90
days and the individual's right to reemployment is not guaranteed either by
statute or by contract, the employment relationship shall be deemed to have
terminated on the 91st day of such leave.

                 (h)      "Enrollment Date" shall mean the first day of each
Offering Period.

                 (i)      "Exercise Date" shall mean the last day of each
Purchase Period.
<PAGE>   2
                 (j)      "Fair Market Value" shall mean, as of any date, the
value of Common Stock determined as follows:

                          (1)     If the Common Stock is listed on any
established stock exchange or a national market system, including without
limitation the Nasdaq National Market or The Nasdaq SmallCap Market of The
Nasdaq Stock Market, its Fair Market Value shall be the closing sales price for
such stock (or the closing bid, if no sales were reported) as quoted on such
exchange or system for the last market trading day prior to the time of
determination, as reported in The Wall Street Journal or such other source as
the Administrator deems reliable, or;

                          (2)     If the Common Stock is regularly quoted by a
recognized securities dealer but selling prices are not reported, its Fair
Market Value shall be the mean of the closing bid and asked prices for the
Common Stock on the date of such determination, as reported in The Wall Street
Journal or such other source as the Board deems reliable, or;

                          (3)     For the purposes of the Enrollment Date under
the first Offering Period under the Plan, the Fair Market Value of the Common
Stock shall be the price to public as set forth in the final prospectus
included within the Registration Statement on Form S-1 filed with the
Securities and Exchange Commission for the initial public offering of the
Common Stock.

                          (4)     In the absence of an established market for
the Common Stock, the Fair Market Value thereof shall be determined in good
faith by the Board.

                 (k)      "Offering Periods" shall mean the periods of
approximately twenty-four (24) months during which an option granted pursuant
to the Plan may be exercised, commencing on the first Trading Day on or after
May 1 and November 1 of each year and terminating on the last Trading Day in
the periods ending twenty-four months later.  The first Offering Period shall
be the period commencing with the first Trading Day on or after the date on
which the Company's registration statement on Form S-1 is declared effective by
the Securities and Exchange Commission and terminating on the last Trading Day
on or before April 30, 1998.  The duration and timing of Offering Periods may
be changed pursuant to Section 4 of this Plan.

                 (l)      "Plan" shall mean this Employee Stock Purchase Plan.

                 (m)      "Purchase Price" shall mean an amount equal to 85% of
the Fair Market Value of a share of Common Stock on the Enrollment Date or on
the Exercise Date, whichever is lower.

                 (n)      "Purchase Period" shall mean the approximately
six-month period commencing after one Exercise Date and ending with the next
Exercise Date, except that the first Purchase Period of any Offering Period
shall commence on the Enrollment Date and end with the next Exercise Date.


                                       -2-
<PAGE>   3
                 (o)      "Reserves" shall mean the number of shares of Common
Stock covered by each option under the Plan which have not yet been exercised
and the number of shares of Common Stock which have been authorized for
issuance under the Plan but not yet placed under option.

                 (p)      "Subsidiary" shall mean a corporation, domestic or
foreign, of which not less than 50% of the voting shares are held by the
Company or a Subsidiary, whether or not such corporation now exists or is
hereafter organized or acquired by the Company or a Subsidiary.

                 (q)      "Trading Day" shall mean a day on which national
stock exchanges and the Nasdaq System are open for trading.

         3.      Eligibility.

                 (a)      Any Employee (as defined in Section 2(g)), who shall
be employed by the Company on a given Enrollment Date shall be eligible to
participate in the Plan.

                 (b)      Any provisions of the Plan to the contrary
notwithstanding, no Employee shall be granted an option under the Plan (i) to
the extent that, immediately after the grant, such Employee (or any other
person whose stock would be attributed to such Employee pursuant to Section
424(d) of the Code) would own capital stock of the Company and/or hold
outstanding options to purchase such stock possessing five percent (5%) or more
of the total combined voting power or value of all classes of the capital stock
of the Company or of any Subsidiary, or (ii) to the extent that his or her
rights to purchase stock under all employee stock purchase plans of the Company
and its subsidiaries accrues at a rate which exceeds Twenty-Five Thousand
Dollars ($25,000) worth of stock (determined at the fair market value of the
shares at the time such option is granted) for each calendar year in which such
option is outstanding at any time.

         4.      Offering Periods.  The Plan shall be implemented by
consecutive, overlapping Offering Periods with a new Offering Period commencing
on the first Trading Day on or after May 1 and November 1 each year, or on such
other date as the Board shall determine, and continuing thereafter until
terminated in accordance with Section 19 hereof.  The first Offering Period
shall begin on the effective date of the initial public offering of the
Company's Common Stock that is filed with the Securities and Exchange
Commission and Exchange Commission and shall end on the last Trading Day on or
before April 30, 1998.  The Board shall have the power to change the duration
of Offering Periods (including the commencement dates thereof) with respect to
future offerings without stockholder approval if such change is announced at
least five (5) days prior to the scheduled beginning of the first Offering
Period to be effected thereafter.

         5.      Participation.

                 (a)      An eligible Employee may become a participant in the
Plan by completing a subscription agreement authorizing payroll deductions in
the form of Exhibit A to this Plan and filing it with the Company's payroll
office prior to the applicable Enrollment Date.





                                      -3-

<PAGE>   4
                 (b)      Payroll deductions for a participant shall commence
on the first payroll following the Enrollment Date and shall end on the last
payroll in the Offering Period to which such authorization is applicable,
unless sooner terminated by the participant as provided in Section 10 hereof.

         6.      Payroll Deductions.

                 (a)      At the time a participant files his or her
subscription agreement, he or she shall elect to have payroll deductions made
on each pay day during the Offering Period in an amount not exceeding fifteen
percent (15%) of the Compensation which he or she receives on each pay day
during the Offering Period.

                 (b)      All payroll deductions made for a participant shall
be credited to his or her account under the Plan and shall be withheld in whole
percentages only.  A participant may not make any additional payments into such
account.

                 (c)      A participant may discontinue his or her
participation in the Plan as provided in Section 10 hereof, or may increase or
decrease the rate of his or her payroll deductions during the Offering Period
by completing or filing with the Company a new subscription agreement
authorizing a change in payroll deduction rate.  The Board may, in its
discretion, limit the number of participation rate changes during any Offering
Period.  The change in rate shall be effective with the first full payroll
period following five (5) business days after the Company's receipt of the new
subscription agreement unless the Company elects to process a given change in
participation more quickly.  A participant's subscription agreement shall
remain in effect for successive Offering Periods unless terminated as provided
in Section 10 hereof.

                 (d)      Notwithstanding the foregoing, to the extent
necessary to comply with Section 423(b)(8) of the Code and Section 3(b) hereof,
a participant's payroll deductions may be decreased to zero percent (0%) at
such time during any Purchase Period which is scheduled to end during the
current calendar year (the "Current Purchase Period") that the aggregate of all
payroll deductions which were previously used to purchase stock under the Plan
in a prior Purchase Period which ended during that calendar year plus all
payroll deductions accumulated with respect to the Current Purchase Period
equal $21,250.  Payroll deductions shall recommence at the rate provided in
such participant's subscription agreement at the beginning of the first
Purchase Period which is scheduled to end in the following calendar year,
unless terminated by the participant as provided in Section 10 hereof.

                 (e)      At the time the option is exercised, in whole or in
part, or at the time some or all of the Company's Common Stock issued under the
Plan is disposed of, the participant must make adequate provision for the
Company's federal, state, or other tax withholding obligations, if any, which
arise upon the exercise of the option or the disposition of the Common Stock.
At any time, the Company may, but shall not be obligated to, withhold from the
participant's compensation the amount necessary for the Company to meet
applicable withholding obligations, including any withholding





                                      -4-

<PAGE>   5
required to make available to the Company any tax deductions or benefits
attributable to sale or early disposition of Common Stock by the Employee.

         7.      Grant of Option.  On the Enrollment Date of each Offering
Period, each eligible Employee participating in such Offering Period shall be
granted an option to purchase on each Exercise Date during such Offering Period
(at the applicable Purchase Price) up to a number of shares of the Company's
Common Stock determined by dividing such Employee's payroll deductions
accumulated prior to such Exercise Date and retained in the Participant's
account as of the Exercise Date by the applicable Purchase Price; provided that
in no event shall an Employee be permitted to purchase during each Purchase
Period more than a number of shares determined by dividing $12,500 by the Fair
Market Value of a share of the Company's Common Stock on the Enrollment Date,
and provided further that such purchase shall be subject to the limitations set
forth in Sections 3(b) and 12 hereof. Exercise of the option shall occur as
provided in Section 8 hereof, unless the participant has withdrawn pursuant to
Section 10 hereof.  The option shall expire on the last day of the Offering
Period.

         8.      Exercise of Option.  Unless a participant withdraws from the
Plan as provided in Section 10 hereof, his or her option for the purchase of
shares shall be exercised automatically on the Exercise Date, and the maximum
number of full shares subject to option shall be purchased for such participant
at the applicable Purchase Price with the accumulated payroll deductions in his
or her account.  No fractional shares shall be purchased; any payroll
deductions accumulated in a participant's account which are not sufficient to
purchase a full share shall be retained in the participant's account for the
subsequent Purchase Period or Offering Period, subject to earlier withdrawal by
the participant as provided in Section 10 hereof.  Any other monies left over
in a participant's account after the Exercise Date shall be returned to the
participant.  During a participant's lifetime, a participant's option to
purchase shares hereunder is exercisable only by him or her.

         9.      Delivery.  As promptly as practicable after each Exercise Date
on which a purchase of shares occurs, the Company shall arrange the delivery to
each participant, as appropriate, of a certificate representing the shares
purchased upon exercise of his or her option.

         10.     Withdrawal; Termination of Employment.

                 (a)      A participant may withdraw all but not less than all
the payroll deductions credited to his or her account and not yet used to
exercise his or her option under the Plan at any time by giving written notice
to the Company in the form of Exhibit B to this Plan.  All of the participant's
payroll deductions credited to his or her account shall be paid to such
participant promptly after receipt of notice of withdrawal and such
participant's option for the Offering Period shall be automatically terminated,
and no further payroll deductions for the purchase of shares shall be made for
such Offering Period.  If a participant withdraws from an Offering Period,
payroll deductions shall not resume at the beginning of the succeeding Offering
Period unless the participant delivers to the Company a new subscription
agreement.





                                      -5-

<PAGE>   6
                 (b)      Upon a participant's ceasing to be an Employee (as
defined in Section 2(g) hereof), for any reason, he or she shall be deemed to
have elected to withdraw from the Plan and the payroll deductions credited to
such participant's account during the Offering Period but not yet used to
exercise the option shall be returned to such participant or, in the case of
his or her death, to the person or persons entitled thereto under Section 14
hereof, and such participant's option shall be automatically terminated.  The
preceding sentence notwithstanding, a participant who receives payment in lieu
of notice of termination of employment shall be treated as continuing to be an
Employee for the participant's customary number of hours per week of employment
during the period in which the participant is subject to such payment in lieu
of notice.

                 (c)      A participant's withdrawal from an Offering Period
shall not have any effect upon his or her eligibility to participate in any
similar plan which may hereafter be adopted by the Company or in succeeding
Offering Periods which commence after the termination of the Offering Period
from which the participant withdraws.

         11.     Interest.  No interest shall accrue on the payroll deductions
                 of a participant in the Plan.

         12.     Stock.

                 (a)      The maximum number of shares of the Company's Common
Stock which shall be made available for sale under the Plan shall be one
hundred twenty-three thousand (123,000) shares, subject to adjustment upon
changes in capitalization of the Company as provided in Section 18 hereof.  If,
on a given Exercise Date, the number of shares with respect to which options
are to be exercised exceeds the number of shares then available under the Plan,
the Company shall make a pro rata allocation of the shares remaining available
for purchase in as uniform a manner as shall be practicable and as it shall
determine to be equitable.

                 (b)      The participant shall have no interest or voting
right in shares covered by his option until such option has been exercised.

                 (c)      Shares to be delivered to a participant under the
Plan shall be registered in the name of the participant or in the name of the
participant and his or her spouse.

         13.     Administration.

                 (a)  Administrative Body.  The Plan shall be administered by
the Board or a committee of members of the Board appointed by the Board.  The
Board or its committee shall have full and exclusive discretionary authority to
construe, interpret and apply the terms of the Plan, to determine eligibility
and to adjudicate all disputed claims filed under the Plan.  Every finding,
decision and determination made by the Board or its committee shall, to the
full extent permitted by law, be final and binding upon all parties.





                                      -6-

<PAGE>   7
                 (b)      Rule 16b-3 Limitations.  Notwithstanding the
provisions of Subsection (a) of this Section 13, in the event that Rule 16b-3
promulgated under the Securities Exchange Act of 1934, as amended (the
"Exchange Act"), or any successor provision ("Rule 16b-3") provides specific
requirements for the administrators of plans of this type, the Plan shall be
administered only by such a body and in such a manner as shall comply with the
applicable requirements of Rule 16b-3.  Unless permitted by Rule 16b-3, no
discretion concerning decisions regarding the Plan shall be afforded to any
committee or person that is not "disinterested" as that term is used in Rule
16b-3.

         14.     Designation of Beneficiary.

                 (a)      A participant may file a written designation of a
beneficiary who is to receive any shares and cash, if any, from the
participant's account under the Plan in the event of such participant's death
subsequent to an Exercise Date on which the option is exercised but prior to
delivery to such participant of such shares and cash.  In addition, a
participant may file a written designation of a beneficiary who is to receive
any cash from the participant's account under the Plan in the event of such
participant's death prior to exercise of the option.  If a participant is
married and the designated beneficiary is not the spouse, spousal consent shall
be required for such designation to be effective.

                 (b)      Such designation of beneficiary may be changed by the
participant at any time by written notice.  In the event of the death of a
participant and in the absence of a beneficiary validly designated under the
Plan who is living at the time of such participant's death, the Company shall
deliver such shares and/or cash to the executor or administrator of the estate
of the participant, or if no such executor or administrator has been appointed
(to the knowledge of the Company), the Company, in its discretion, may deliver
such shares and/or cash to the spouse or to any one or more dependents or
relatives of the participant, or if no spouse, dependent or relative is known
to the Company, then to such other person as the Company may designate.

         15.     Transferability.  Neither payroll deductions credited to a
participant's account nor any rights with regard to the exercise of an option
or to receive shares under the Plan may be assigned, transferred, pledged or
otherwise disposed of in any way (other than by will, the laws of descent and
distribution or as provided in Section 14 hereof) by the participant.  Any such
attempt at assignment, transfer, pledge or other disposition shall be without
effect, except that the Company may treat such act as an election to withdraw
funds from an Offering Period in accordance with Section 10 hereof.

         16.     Use of Funds.  All payroll deductions received or held by the
Company under the Plan may be used by the Company for any corporate purpose,
and the Company shall not be obligated to segregate such payroll deductions.

         17.     Reports.  Individual accounts shall be maintained for each
participant in the Plan.  Statements of account shall be given to participating
Employees at least annually, which statements shall set forth the amounts of
payroll deductions, the Purchase Price, the number of shares purchased and the
remaining cash balance, if any.





                                      -7-

<PAGE>   8
         18.     Adjustments Upon Changes in Capitalization, Dissolution,
                 Liquidation, Merger or Asset Sale.

                 (a)      Changes in Capitalization.  Subject to any required
action by the stockholders of the Company, the Reserves, as well as the price
per share and the number of shares of Common Stock covered by each option under
the Plan which has not yet been exercised, shall be proportionately adjusted
for any increase or decrease in the number of issued shares of Common Stock
resulting from a stock split, reverse stock split, stock dividend, combination
or reclassification of the Common Stock, or any other increase or decrease in
the number of shares of Common Stock effected without receipt of consideration
by the Company; provided, however, that conversion of any convertible
securities of the Company shall not be deemed to have been "effected without
receipt of consideration".  Such adjustment shall be made by the Board, whose
determination in that respect shall be final, binding and conclusive.  Except
as expressly provided herein, no issuance by the Company of shares of stock of
any class, or securities convertible into shares of stock of any class, shall
affect, and no adjustment by reason thereof shall be made with respect to, the
number or price of shares of Common Stock subject to an option.

                 (b)      Dissolution or Liquidation.  In the event of the
proposed dissolution or liquidation of the Company, the Offering Periods shall
terminate immediately prior to the consummation of such proposed action, unless
otherwise provided by the Board.

                 (c)      Merger or Asset Sale.  In the event of a proposed
sale of all or substantially all of the assets of the Company, or the merger of
the Company with or into another corporation, the Purchase Period then in
progress shall be shortened by setting a new Exercise Date (the "New Exercise
Date") and the Offering Period then in progress shall end on the New Exercise
Date.  The New Exercise Date shall be before the date of the Company's proposed
sale or merger.  The Board shall notify each participant in writing, at least
ten (10) business days prior to the New Exercise Date, that the Exercise Date
for the participant's option has been changed to the New Exercise Date and that
the participant's option shall be exercised automatically on the New Exercise
Date, unless prior to such date the participant has withdrawn from the Offering
Period as provided in Section 10 hereof.

         19.     Amendment or Termination.

                 (a)      The Board of Directors of the Company may at any time
and for any reason terminate or amend the Plan.  Except as provided in Section
18 hereof, no such termination can affect options previously granted, provided
that an Offering Period may be terminated by the Board of Directors on any
Exercise Date if the Board determines that the termination of the Plan is in
the best interests of the Company and its stockholders.  Except as provided in
Section 18 hereof, no amendment may make any change in any option theretofore
granted which adversely affects the rights of any participant.  To the extent
necessary to comply with Rule 16b-3 or under Section 423 of the Code (or any
successor rule or provision or any other applicable law or regulation), the
Company shall obtain stockholder approval in such a manner and to such a degree
as required.





                                      -8-

<PAGE>   9
                 (b)      Without stockholder consent and without regard to
whether any participant rights may be considered to have been "adversely
affected," the Board (or its committee) shall be entitled to change the
Offering Periods, limit the frequency and/or number of changes in the amount
withheld during an Offering Period, establish the exchange ratio applicable to
amounts withheld in a currency other than U.S. dollars, permit payroll
withholding in excess of the amount designated by a participant in order to
adjust for delays or mistakes in the Company's processing of properly completed
withholding elections, establish reasonable waiting and adjustment periods
and/or accounting and crediting procedures to ensure that amounts applied
toward the purchase of Common Stock for each participant properly correspond
with amounts withheld from the participant's Compensation, and establish such
other limitations or procedures as the Board (or its committee) determines in
its sole discretion advisable which are consistent with the Plan.

         20.     Notices.  All notices or other communications by a participant
to the Company under or in connection with the Plan shall be deemed to have
been duly given when received in the form specified by the Company at the
location, or by the person, designated by the Company for the receipt thereof.

         21.     Conditions Upon Issuance of Shares.  Shares shall not be
issued with respect to an option unless the exercise of such option and the
issuance and delivery of such shares pursuant thereto shall comply with all
applicable provisions of law, domestic or foreign, including, without
limitation, the Securities Act of 1933, as amended, the Securities Exchange Act
of 1934, as amended, the rules and regulations promulgated thereunder, and the
requirements of any stock exchange upon which the shares may then be listed,
and shall be further subject to the approval of counsel for the Company with
respect to such compliance.

                 As a condition to the exercise of an option, the Company may
require the person exercising such option to represent and warrant at the time
of any such exercise that the shares are being purchased only for investment
and without any present intention to sell or distribute such shares if, in the
opinion of counsel for the Company, such a representation is required by any of
the aforementioned applicable provisions of law.

         22.     Term of Plan.  The Plan shall become effective upon the
earlier to occur of its adoption by the Board of Directors or its approval by
the stockholders of the Company.  It shall continue in effect for a term of ten
(10) years unless sooner terminated under Section 19 hereof.

         23.     Automatic Transfer to Low Price Offering Period.  To the
extent permitted by Rule 16b-3 of the Exchange Act, if the Fair Market Value of
the Common Stock on any Exercise Date in an Offering Period is lower than the
Fair Market Value of the Common Stock on the Enrollment Date of such Offering
Period, then all participants in such Offering Period shall be automatically
withdrawn from such Offering Period immediately after the exercise of their
option on such Exercise Date and automatically re-enrolled in the immediately
following Offering Period as of the first day thereof.





                                      -9-

<PAGE>   10
                                   EXHIBIT A


                          CARDIAC PATHWAYS CORPORATION

                       1996 EMPLOYEE STOCK PURCHASE PLAN

                             SUBSCRIPTION AGREEMENT



_____ Original Application                        Enrollment Date: ___________
_____ Change in Payroll Deduction Rate
_____ Change of Beneficiary(ies)


1.       _____________________________________________________ hereby elects to
         participate in the Cardiac Pathways Corporation 1996 Employee Stock
         Purchase Plan (the "Employee Stock Purchase Plan") and subscribes to
         purchase shares of the Company's Common Stock in accordance with this
         Subscription Agreement and the Employee Stock Purchase Plan.

2.       I hereby authorize payroll deductions from each paycheck in the amount
         of ____% of my Compensation on each payday (from 1 to 15%) during the
         Offering Period in accordance with the Employee Stock Purchase Plan.
         (Please note that no fractional percentages are permitted.)

3.       I understand that said payroll deductions shall be accumulated for the
         purchase of shares of Common Stock at the applicable Purchase Price
         determined in accordance with the Employee Stock Purchase Plan.  I
         understand that if I do not withdraw from an Offering Period, any
         accumulated payroll deductions will be used to automatically exercise
         my option.

4.       I have received a copy of the complete Employee Stock Purchase Plan.
         I understand that my participation in the Employee Stock Purchase Plan
         is in all respects subject to the terms of the Plan.  I understand
         that my ability to exercise the option under this Subscription
         Agreement is subject to stockholder approval of the Employee Stock
         Purchase Plan.

5.       Shares purchased for me under the Employee Stock Purchase Plan should
         be issued in the name(s) of (Employee or Employee and Spouse only):
         _______________________________________________________________________
         ________________.

6.       I understand that if I dispose of any shares received by me pursuant
         to the Plan within 2 years after the Enrollment Date (the first day of
         the Offering Period during which I purchased such shares) or one year
         after the Exercise Date, I will be treated for federal income tax
         purposes as having received ordinary income at the time of such
         disposition in an amount equal to the excess of the fair market value
         of the shares at the time such shares were purchased by me over the
         price which I paid for the shares.  I hereby agree to notify the
         Company in writing
<PAGE>   11
         within 30 days after the date of any disposition of my shares and I
         will make adequate provision for Federal, state or other tax
         withholding obligations, if any, which arise upon the disposition of
         the Common Stock.  The Company may, but will not be obligated to,
         withhold from my compensation the amount necessary to meet any
         applicable withholding obligation including any withholding necessary
         to make available to the Company any tax deductions or benefits
         attributable to sale or early disposition of Common Stock by me. If I
         dispose of such shares at any time after the expiration of the 2-year
         and 1-year holding periods, I understand that I will be treated for
         federal income tax purposes as having received income only at the time
         of such disposition, and that such income will be taxed as ordinary
         income only to the extent of an amount equal to the lesser of (1) the
         excess of the fair market value of the shares at the time of such
         disposition over the purchase price which I paid for the shares, or
         (2) 15% of the fair market value of the shares on the first day of the
         Offering Period.  The remainder of the gain, if any, recognized on
         such disposition will be taxed as capital gain.

7.       I hereby agree to be bound by the terms of the Employee Stock Purchase
         Plan.  The effectiveness of this Subscription Agreement is dependent
         upon my eligibility to participate in the Employee Stock Purchase
         Plan.

8.       In the event of my death, I hereby designate the following as my
         beneficiary(ies) to receive all payments and shares due me under the
         Employee Stock Purchase Plan:


NAME:  (Please print)______________________________________________
                      (First)         (Middle)               (Last)


_______________________________   _____________________________________________
Relationship

                                   _____________________________________________
                                   (Address)





                                      -2-

<PAGE>   12
Employee's Social
Security Number:                            ____________________________________



Employee's Address:                         ____________________________________

                                            ____________________________________

                                            ____________________________________


I UNDERSTAND THAT THIS SUBSCRIPTION AGREEMENT SHALL REMAIN IN EFFECT THROUGHOUT
SUCCESSIVE OFFERING PERIODS UNLESS TERMINATED BY ME.



Dated:_________________________   ________________________________________
                                  Signature of Employee


                                  ________________________________________
                                  Spouse's Signature (If beneficiary
                                  other than spouse)





                                      -3-


<PAGE>   1
                                                                     Exhibit 4.2

                          CARDIAC PATHWAYS CORPORATION
                                1991 STOCK PLAN
                            (AS AMENDED APRIL 1996)


         1.      PURPOSES OF THE PLAN.  The purposes of this Stock Plan are to
attract and retain the best available personnel for positions of substantial
responsibility, to provide additional incentive to Employees and Consultants of
the Company and its Subsidiaries and to promote the success of the Company's
business.  Options granted under the Plan may be incentive stock options (as
defined under Section 422 of the Code) or nonstatutory stock options, as
determined by the Administrator at the time of grant of an option and subject
to the applicable provisions of Section 422 of the Code, as amended, and the
regulations promulgated thereunder.  Stock purchase rights may also be granted
under the Plan.

         2.      CERTAIN DEFINITIONS.  As used herein, the following
                 definitions shall apply:

                 (a)      "ADMINISTRATOR" means the Board or any of its
Committees appointed pursuant to Section 4 of the Plan.

                 (b)      "BOARD" means the Board of Directors of the Company.

                 (c)      "CODE" means the Internal Revenue Code of 1986, as
amended.

                 (d)      "COMMITTEE" means the Committee appointed by the
Board of Directors in accordance with paragraph (a) of Section 4 of the Plan.

                 (e)      "COMMON STOCK" means the Common Stock of the company.

                 (f)      "COMPANY" means Cardiac Pathways Corporation, a
California corporation.

                 (g)      "CONSULTANT" means any person, including an advisor,
who is engaged by the Company or any Parent or Subsidiary to render services
and is compensated for such services.  The term Consultant shall not include
directors who are not compensated for their services or are paid only a
director's fee by the Company.

                 (h)      "CONTINUOUS STATUS AS AN EMPLOYEE OR CONSULTANT"
means that the employment or consulting relationship with the Company, any
Parent, or Subsidiary, is not interrupted or terminated.  Continuous Status as
an Employee or Consultant shall not be considered interrupted in the case of
(i) any leave of absence approved by the Company or (ii) transfers between
locations of the Company or between the Company, its Parent, any Subsidiary, or
any successor.  A leave of absence approved by the Company shall include sick
leave, military leave, or any other personal leave approved by an authorized
representative of the Company.  For purposes of Incentive
<PAGE>   2
Stock Options, no such leave may exceed ninety days, unless reemployment upon
expiration of such leave is guaranteed by statute or contract.  If reemployment
upon expiration of a leave of absence approved by the Company is not so
guaranteed, on the 181st day of such leave any Incentive Stock Option held by
the Optionee shall cease to be treated as an Incentive Stock Option and shall
be treated for tax purposes as a Nonstatutory Stock Option.

                 (i)      "EMPLOYEE" means any person, including officers and
directors, employed by the Company or any Parent or Subsidiary of the Company.
The payment of a director's fee by the Company shall not be sufficient to
constitute "employment" by the Company.

                 (j)      "EXCHANGE ACT" means the Securities Exchange Act of
1934, as amended.

                 (k)      "FAIR MARKET VALUE" means, as of any date, the value
of Common Stock determined as follows:

                          (i)     If the Common Stock is listed on any
established stock exchange or a national market system, including without
limitation the Nasdaq National Market or The Nasdaq SmallCap Market of The
Nasdaq Stock Market, its Fair Market Value shall be the closing sales price for
such stock (or the closing bid, if no sales were reported) as quoted on such
exchange or system for the last market trading day prior to the time of
determination, as reported in The Wall Street Journal or such other source as
the Administrator deems reliable;

                          (ii)    If the Common Stock is regularly quoted by a
recognized securities dealer but selling prices are not reported, the Fair
Market Value of a Share of Common Stock shall be the mean between the high bid
and low asked prices for the Common Stock on the last market trading day prior
to the day of determination, as reported in The Wall Street Journal or such
other source as the Administrator deems reliable;

                          (iii)   In the absence of an established market for
the Common Stock, the Fair Market Value shall be determined in good faith by
the Administrator.

                 (l)      "INCENTIVE STOCK OPTION" means an Option intended to
qualify as an incentive stock option within the meaning of Section 422 of the
Code.

                 (m)      "NONSTATUTORY STOCK OPTION" means an Option not
intended to qualify as an Incentive Stock Option.

                 (n)      "OPTION" means a stock option granted pursuant to the
Plan.

                 (o)      "OPTIONED STOCK" means the Common Stock subject to an
Option.

                 (p)      "OPTIONEE" means an Employee or Consultant who
receives an Option.



                                       -2-

<PAGE>   3
                 (q)      "PARENT" means a "parent corporation," whether now or
hereafter existing, as defined in Section 424(e) of the Code.

                 (r)      "PLAN" means this 1991 Stock Plan.

                 (s)      "RESTRICTED STOCK" means shares of Common Stock
acquired pursuant to a grant of a Stock Purchase Right under Section 11 below.

                 (t)      "SHARE" means a share of the Common Stock, as
adjusted in accordance with Section 13 of the Plan.

                 (u)      "SUBSIDIARY" means a "subsidiary corporation,"
whether now or hereafter existing, as defined in Section 424(f) of the Code.

         3.      STOCK SUBJECT TO THE PLAN.  Subject to the provisions of
Section 14 of the Plan, the maximum aggregate number of shares which may be
optioned and sold under the Plan is 2,267,030 shares of Common Stock.  The
shares may be authorized, but unissued, or re-acquired Common Stock.

                 If an Option or Stock Purchase Right should expire or become
unexercisable for any reason without having been exercised in full, the
unpurchased Shares which were subject thereto shall, unless the Plan shall have
been terminated, become available for future grant under the Plan.

         4.      ADMINISTRATION OF THE PLAN.

                 (a)      PROCEDURE.

                          (i)     MULTIPLE ADMINISTRATIVE BODIES.  If permitted
by Rule 16b-3, the Plan may be administered by different bodies with respect to
directors, officers who are not directors, and Employees who are neither
directors nor officers.

                          (ii)    ADMINISTRATION WITH RESPECT TO DIRECTORS AND
OFFICERS SUBJECT TO SECTION 16(B).  With respect to Option or Stock Purchase
Right grants made to Employees who are also officers or directors subject to
Section 16 of the Exchange Act, the Plan shall be administered by (A) the
Board, if the Board may administer the Plan in a manner complying with the
rules under Rule 16b-3 relating to the disinterested administration of employee
benefit plans under which Section 16(b) exempt discretionary grants and awards
of equity securities are to be made, or (B) a Committee designated by the Board
to administer the Plan, which Committee shall be constituted to comply with the
rules under Rule 16b-3 relating to the disinterested administration of employee
benefit plans under which Section 16(b) exempt discretionary grants and awards
of equity securities are to be made.  Once appointed, such Committee shall
continue to serve in its designated capacity until otherwise directed by the
Board.  From time to time the Board may increase the size of the Committee and
appoint additional members, remove members (with or without cause) and
substitute new members, fill vacancies (however caused), and remove all members
of the Committee and thereafter directly





                                      -3-
<PAGE>   4
administer the Plan, all to the extent permitted by the rules under Rule 16b-3
relating to the disinterested administration of employee benefit plans under
which Section 16(b) exempt discretionary grants and awards of equity securities
are to be made.

                          (iii)   ADMINISTRATION WITH RESPECT TO OTHER PERSONS.
With respect to Option or Stock Purchase Right grants made to Employees or
Consultants who are neither directors nor officers of the Company, the Plan
shall be administered by (A) the Board or (B) a Committee designated by the
Board, which committee shall be constituted to satisfy the legal requirements
relating to the administration of incentive stock plans of California corporate
and securities laws and the Code (the "Applicable Laws").  Once appointed, such
Committee shall serve in its designated capacity until otherwise directed by
the Board.  The Board may increase the size of the Committee and appoint
additional members, remove members (with or without cause) and substitute new
members, fill vacancies (however caused), and remove all members of the
Committee and thereafter directly administer the Plan, all to the extent
permitted by Applicable Laws.

         (b)     POWERS OF THE ADMINISTRATOR.  Subject to the provisions of the
Plan and in the case of a Committee, the specific duties delegated by the Board
to such Committee, the Administrator shall have the authority, in its
discretion:

                          (i)     to determine the Fair Market Value of the
Common Stock, in accordance with Section 2(k) of the Plan;

                          (ii)    to select the Consultants and Employees to
whom Options and Stock Purchase Rights may from time to time be granted
hereunder;

                          (iii)   to determine whether and to what extent
Options and Stock Purchase Rights or any combination thereof, are granted
hereunder;

                          (iv)    to determine the number of shares of Common
Stock to be covered by each such award granted hereunder;

                          (v)     to approve forms of agreement for use under
the Plan;

                          (vi)    to determine the terms and conditions, not
inconsistent with the terms of the Plan, of any award granted hereunder
(including, but not limited to, the share price and any restriction or
limitation or waiver of forfeiture restrictions regarding any Option or other
award and/or the shares of Common Stock relating thereto, based in each case on
such factors as the Administrator shall determine, in its sole discretion;

                          (vii)   to determine whether and under what
circumstances an Option may be settled in cash under subsection 10(f) instead
of Common Stock;

                          (viii)  to determine whether, to what extent and
under what circumstances Common Stock and other amounts payable with respect to
an award under this Plan shall be deferred





                                      -4-
<PAGE>   5
either automatically or at the election of the participant (including providing
for and determining the amount, if any, of any deemed earnings on any deferred
amount during any deferral period);

                          (ix)    to reduce the exercise price of any Option to
the then current Fair Market Value if the Fair Market Value of the Common Stock
covered by such Option shall have declined since the date the Option was
granted; and

                          (x)     to determine the terms and restrictions
applicable to Stock Purchase Rights and the Restricted Stock purchased by
exercising such Stock Purchase Rights.

                 (c)      EFFECT OF COMMITTEE'S DECISION.  All decisions,
determinations and interpretations of the Administrator shall be final and
binding on all Optionees and any other holders of any Options.

         5.      ELIGIBILITY.  Nonstatutory Stock Options and Stock Purchase
Rights may be granted to Employees and Consultants.  Incentive Stock Options
may be granted only to Employees.  An Employee or Consultant who has been
granted an Option or Stock Purchase Right may, if he is otherwise eligible, be
granted additional Options or Stock Purchase Rights.

         6.      LIMITATIONS.

                 (a)      Each Option shall be designated in the written option
agreement as either an Incentive Stock Option or a Nonstatutory Stock Option.
However, notwithstanding such designation, to the extent that the aggregate
Fair Market Value of the Shares with respect to which Incentive Stock Options
are exercisable for the first time by the Optionee during any calendar year
(under all plans of the Company and any Parent or Subsidiary) exceeds $100,000,
such Options shall be treated as Nonstatutory Stock Options.  For purposes of
this Section 6(a), Incentive Stock Options shall be taken into account in the
order in which they were granted.  The Fair Market Value of the Shares shall be
determined as of the time the Option with respect to such Shares is granted.
If an Option is granted hereunder that is part Incentive Stock Option and part
Nonstatutory Stock Option due to becoming first exercisable in any calendar
year in excess of $100,000, the Incentive Stock Option portion of such Option
shall become exercisable first in such calendar year, and the Nonstatutory
Stock Option portion shall commence becoming exercisable once the $100,000
limit has been reached.

                 (b)      Neither the Plan nor any Option or Stock Purchase
Right shall confer upon an Optionee any right with respect to continuing the
Optionee's employment or consulting relationship with the Company, nor shall
they interfere in any way with the Optionee's right or the Company's right to
terminate such employment or consulting relationship at any time, with or
without cause.

                 (c)      The following limitations shall apply to grants of
Options and Stock Purchase Rights to Employees:





                                      -5-
<PAGE>   6
                          (i)     No Employee shall be granted, in any fiscal
year of the Company, Options to purchase more than 200,000 Shares.

                          (ii)    In connection with his or her initial
employment, an Employee may be granted Options to purchase up to an additional
100,000 Shares which shall not count against the limit set forth in subsection
(i) above.

                          (iii)   The foregoing limitations shall be adjusted
proportionately in connection with any change in the Company's capitalization
as described in Section 14.

                          (iv)    If an Option or Stock Purchase Right is
cancelled in the same fiscal year of the Company in which it was granted (other
than in connection with a transaction described in Section 14), the cancelled
Option or Stock Purchase Right will be counted against the limits set forth in
subsections (i) and (ii) above.  For this purpose, if the exercise price of an
Option or Stock Purchase Right is reduced, the transaction will be treated as a
cancellation of the Option or Stock Purchase Right and the grant of a new
Option or Stock Purchase Right.

         7.      TERM OF PLAN.  The Plan shall become effective upon the
earlier to occur of its adoption by the Board of Directors or its approval by
the stockholders of the Company as described in Section 20 of the Plan.  It
shall continue in effect for a term of ten (10) years unless sooner terminated
under Section 16 of the Plan.

         8.      TERM OF OPTION.  The term of each Option shall be the term
stated in the Option Agreement; provided, however, that in the case of an
Incentive Stock Option, the term shall be no more than ten (10) years from the
date of grant thereof or such shorter term as may be provided in the Option
Agreement.  However, in the case of an Option granted to an Optionee who, at
the time the Option is granted, owns stock representing more than ten percent
(10%) of the voting power of all classes of stock of the Company or any Parent
or Subsidiary, the term of the Option shall be five (5) years from the date of
grant thereof or such shorter term as may be provided in the Option Agreement.

         9.      OPTION EXERCISE PRICE AND CONSIDERATION.

                 (a)      The per share exercise price for the Shares to be
issued pursuant to exercise of an Option shall be such price as is determined
by the Administrator, but shall be subject to the following:

                          (i)     In the case of an INCENTIVE STOCK OPTION

                                  (A)      granted to an Employee who, at the
time of the grant of such Incentive Stock Option, owns stock representing more
than ten percent (10%) of the voting power of all classes of stock of the
Company or any Parent or Subsidiary, the per Share exercise price shall be no
less than 110% of the Fair Market Value per Share on the date of grant.





                                      -6-
<PAGE>   7
                                  (B)      granted to any other Employee, the
per Share exercise price shall be no less than 100% of the Fair Market Value
per Share on the date of grant.

                          (ii)    In the case of a NONSTATUTORY STOCK OPTION,
the per Share exercise price shall be determined by the Administrator.

                 (b)      FORM OF CONSIDERATION.  The Administrator shall
determine the acceptable form of consideration for exercising an Option,
including the method of payment.  In the case of an Incentive Stock Option, the
Administrator shall determine the acceptable form of consideration at the time
of grant.  Such consideration may consist entirely of:

                          (i)     cash;

                          (ii)    check;

                          (iii)   promissory note;

                          (iv)    other Shares which (A) in the case of Shares
acquired upon exercise of an option, have been owned by the Optionee for more
than six months on the date of surrender, and (B) have a Fair Market Value on
the date of surrender equal to the aggregate exercise price of the Shares as to
which said Option shall be exercised;

                          (v)     delivery of a properly executed exercise
notice together with such other documentation as the Administrator and the
broker, if applicable, shall require to effect an exercise of the Option and
delivery to the Company of the sale or loan proceeds required to pay the
exercise price;

                          (vi)    a reduction in the amount of any Company
liability to the Optionee, including any liability attributable to the
Optionee's participation in any Company-sponsored deferred compensation program
or arrangement;

                          (vii)   any combination of the foregoing methods of
payment; or

                          (viii)  such other consideration and method of
payment for the issuance of Shares to the extent permitted by Applicable Laws.

         10.     EXERCISE OF OPTION.

                 (a)      PROCEDURE FOR EXERCISE; RIGHTS AS A STOCKHOLDER.  Any
Option granted hereunder shall be exercisable at such times and under such
conditions as determined by the Administrator, including performance criteria
with respect to the Company and/or the Optionee, and as shall be permissible
under the terms of the Plan.

                          An Option may not be exercised for a fraction of a
Share.





                                      -7-
<PAGE>   8
                          An Option shall be deemed to be exercised when
written notice of such exercise has been given to the Company in accordance
with the terms of the Option by the person entitled to exercise the Option, and
full payment for the Shares with respect to which the Option is exercised has
been received by the Company.  Full payment may, as authorized by the
Administrator, consist of any consideration and method of payment allowable
under Section 9(b) of the Plan.  Until the issuance (as evidenced by the
appropriate entry on the books of the Company or of a duly authorized transfer
agent of the Company) of the stock certificate evidencing such Shares, no right
to vote or receive dividends or any other rights as a stockholder shall exist
with respect to the Optioned Stock, notwithstanding the exercise of the Option.
The Company shall issue (or cause to be issued) such stock certificate promptly
upon exercise of the Option.  No adjustment will be made for a dividend or
other right for which the record date is prior to the date the stock
certificate is issued, except as provided in Section 14 of the Plan.

                          Exercise of an Option in any manner shall result in a
decrease in the number of Shares which thereafter may be available, both for
purposes of the Plan and for sale under the Option, by the number of Shares as
to which the Option is exercised.

                 (b)      TERMINATION OF EMPLOYMENT OR CONSULTING RELATIONSHIP.
Upon termination of an Optionee's Continuous Status as an Employee, other than
upon the Optionee's death or Disability, the Optionee may exercise his or her
Option within such period of time as is specified in the option agreement to
the extent that he or she is entitled to exercise it on the date of termination
(but in no event later than the expiration of the term of such Option).  In the
absence of a specified time in the option agreement, the Option shall remain
exercisable for three (3) months following the Optionee's termination.  In the
case of an Incentive Stock Option, such period of time for exercise shall not
exceed three (3) months from the date of termination.  If, on the date of
termination, the Optionee is not entitled to exercise his or her entire Option,
the Shares covered by the unexercisable portion of the Option shall revert to
the Plan.  If, after termination, the Optionee does not exercise his or her
Option within the time specified by the Administrator, the Option shall
terminate, and the Shares covered by such Option shall revert to the Plan.

                 Notwithstanding the above, in the event of an Optionee's
change in status from Consultant to Employee or Employee to Consultant, the
Optionee's Continuous Status as an Employee or Consultant shall not
automatically terminate solely as a result of such change in status.  In such
event, an Incentive Stock Option held by the Optionee shall cease to be treated
as an Incentive Stock Option and shall be treated for tax purposes as a
Nonstatutory Stock Option beginning three months and one day following such
change of status.

                 (c)      DISABILITY OF OPTIONEE.  Upon termination of an
Optionee's Continuous Status as an Employee or Consultant as a result of the
Optionee's total and permanent disability (as defined in Section 22(e)(3) of
the Code), the Optionee may exercise his or her Option at any time within
twelve (12) months from the date of termination, but only to the extent that
the Optionee is entitled to exercise it on the date of termination (and in no
event later than the expiration of the term of the Option).  If, on the date of
termination, the Optionee is not entitled to exercise his or her entire Option,
the Shares covered by the unexercisable portion of the Option shall revert to
the Plan.  If,





                                      -8-
<PAGE>   9
after termination, the Optionee does not exercise his or her Option within the
time specified herein, the Option shall terminate, and the Shares covered by
such Option shall revert to the Plan.

                 (d)      DEATH OF OPTIONEE.  Upon the death of an Optionee,
the Option may be exercised at any time within twelve (12) months following the
date of death (but in no event later than the expiration of the term of such
Option), by the Optionee's estate or by a person who acquires the right to
exercise the Option by bequest or inheritance, but only to the extent that the
Optionee would have been entitled to exercise the Option on the date of death.
If, at the time of death, the Optionee is not entitled to exercise his or her
entire Option, the Shares covered by the unexercisable portion of the Option
shall immediately revert to the Plan.  If the Optionee's estate or the person
who acquires the right to exercise the Option by bequest or inheritance does
not exercise the Option within the time specified herein, the Option shall
terminate, and the Shares covered by such Option shall revert to the Plan.

                 (e)      RULE 16B-3.  Options granted to persons subject to
Section 16 of the Exchange Act must comply with Rule 16b-3 and shall contain
such additional conditions or restrictions as may be required thereunder to
qualify for the maximum exemption from Section 16 of the Exchange Act with
respect to Plan transactions.

                 (f)      BUYOUT PROVISIONS.  The Administrator may at any time
offer to buy out for a payment in cash or Shares, an Option previously granted,
based on such terms and conditions as the Administrator shall establish and
communicate to the Optionee at the time that such offer is made.

         11.     STOCK PURCHASE RIGHTS.

                 (a)      RIGHTS TO PURCHASE.  Stock Purchase Rights may be
issued either alone, in addition to, or in tandem with other awards granted
under the Plan and/or cash awards made outside of the Plan.  After the
Administrator determines that it will offer Stock Purchase Rights under the
Plan, it shall advise the offeree in writing of the terms, conditions and
restrictions related to the offer, including the number of Shares that such
person shall be entitled to purchase, the price to be paid (which price shall
not be less than 50% of the Fair Market Value of the Shares as of the date of
the offer), and the time within which such person must accept such offer, which
shall in no event exceed thirty (30) days from the date upon which the
Administrator made the determination to grant the Stock Purchase Right.  The
offer shall be accepted by execution of a Restricted Stock purchase agreement
in the form determined by the Administrator.  Shares purchased pursuant to the
grant of a Stock Purchase Right shall be referred to herein as "Restricted
Stock."

                 (b)      REPURCHASE OPTION.  Unless the Administrator
determines otherwise, the Restricted Stock purchase agreement shall grant the
Company a repurchase option exercisable upon the voluntary or involuntary
termination of the purchaser's employment with the Company for any reason
(including death or Disability).  The purchase price for Shares repurchased
pursuant to the Restricted Stock purchase agreement shall be the original price
paid by the purchaser and may be paid by cancellation of any indebtedness of
the purchaser to the Company.  The repurchase option shall lapse at such rate
as the Committee may determine.





                                      -9-
<PAGE>   10
                 (c)      RULE 16B-3.  Stock Purchase Rights granted to persons
subject to Section 16 of the Exchange Act, and Shares purchased by such persons
in connection with Stock Purchase Rights, shall be subject to any restrictions
applicable thereto in compliance with Rule 16b- 3.  Such persons may only
purchase Shares pursuant to the grant of a Stock Purchase Right, and may only
sell Shares purchased pursuant to the grant of a Stock Purchase Right, during
such time or times as are permitted by Rule 16b-3.

                 (d)      OTHER PROVISIONS.  The Restricted Stock purchase
agreement shall contain such other terms, provisions and conditions not
inconsistent with the Plan as may be determined by the Administrator in its
sole discretion.  In addition, the provisions of Restricted Stock purchase
agreements need not be the same with respect to each purchaser.

                 (e)      RIGHTS AS A STOCKHOLDER.  Once the Stock Purchase
Right is exercised, the purchaser shall have the rights equivalent to those of
a stockholder, and shall be a stockholder when his or her purchase is entered
upon the records of the duly authorized transfer agent of the Company.  No
adjustment will be made for a dividend or other right for which the record date
is prior to the date the Stock Purchase Right is exercised, except as provided
in Section 14 of the Plan.

         12.     NON-TRANSFERABILITY OF OPTIONS AND STOCK PURCHASE RIGHTS.  An
Option or Stock Purchase Right may not be sold, pledged, assigned,
hypothecated, transferred, or disposed of in any manner other than by will or
by the laws of descent or distribution and may be exercised, during the
lifetime of the Optionee, only by the Optionee.

         13.     STOCK WITHHOLDING TO SATISFY WITHHOLDING TAX OBLIGATIONS.  At
the discretion of the Administrator, Optionees may satisfy withholding
obligations as provided in this paragraph.  When an Optionee incurs tax
liability in connection with an Option or Stock Purchase Right, which tax
liability is subject to tax withholding under applicable tax laws, and the
Optionee is obligated to pay the Company an amount required to be withheld
under applicable tax laws, the Optionee may satisfy the withholding tax
obligation by electing to have the Company withhold from the Shares to be
issued upon exercise of the Option, or the Shares to be issued in connection
with the Stock Purchase Right, if any, that number of Shares having a Fair
Market Value equal to the amount required to be withheld.  The Fair Market
Value of the Shares to be withheld shall be determined on the date that the
amount of tax to be withheld is to be determined (the "Tax Date").

         All elections by an Optionee to have Shares withheld for this purpose
shall be made in writing in a form acceptable to the Administrator and shall be
subject to the following restrictions:

                 (a)      the election must be made on or prior to the
applicable Tax Date;

                 (b)      once made, the election shall be irrevocable as to
the particular Shares of the Option or Right as to which the election is made;

                 (c)      all elections shall be subject to the consent or
disapproval of the Administrator;





                                      -10-
<PAGE>   11
                 (d)      if the Optionee is subject to Section 16 of the
Exchange Act, the election must comply with the applicable provisions of Rule
16b-3 and shall be subject to such additional conditions or restrictions as may
be required thereunder to qualify for the maximum exemption from Section 16 of
the Exchange Act with respect to Plan transactions.

         In the event the election to have Shares withheld is made by an
Optionee and the Tax Date is deferred under Section 83 of the Code because no
election is filed under Section 83(b) of the Code, the Optionee shall receive
the full number of Shares with respect to which the Option or Stock Purchase
Right is exercised, but such Optionee shall be unconditionally obligated to
tender back to the Company the proper number of Shares on the Tax Date.

         14.     ADJUSTMENTS UPON CHANGES IN CAPITALIZATION, DISSOLUTION,
                 MERGER OR ASSET SALE.

                 (a)      CHANGES IN CAPITALIZATION.  Subject to any required
action by the stockholders of the Company, the number of shares of Common Stock
covered by each outstanding Option and Stock Purchase Right, and the number of
shares of Common Stock which have been authorized for issuance under the Plan
but as to which no Options or Stock Purchase Rights have yet been granted or
which have been returned to the Plan upon cancellation or expiration of an
Option or Stock Purchase Right, as well as the price per share of Common Stock
covered by each such outstanding Option or Stock Purchase Right, shall be
proportionately adjusted for any increase or decrease in the number of issued
shares of Common Stock resulting from a stock split, reverse stock split, stock
dividend, combination or reclassification of the Common Stock, or any other
increase or decrease in the number of issued shares of Common Stock effected
without receipt of consideration by the Company; provided, however, that
conversion of any convertible securities of the Company shall not be deemed to
have been "effected without receipt of consideration."  Such adjustment shall
be made by the Board, whose determination in that respect shall be final,
binding and conclusive.  Except as expressly provided herein, no issuance by
the Company of shares of stock of any class, or securities convertible into
shares of stock of any class, shall affect, and no adjustment by reason thereof
shall be made with respect to, the number or price of shares of Common Stock
subject to an Option or Stock Purchase Right.

                 (b)      DISSOLUTION OR LIQUIDATION.  In the event of the
proposed dissolution or liquidation of the Company, the Administrator shall
notify each Optionee as soon as practicable prior to the effective date of such
proposed transaction.  The Administrator in its discretion may provide for an
Optionee to have the right to exercise his or her Option until ten (10) days
prior to such transaction as to all of the Optioned Stock covered thereby,
including Shares as to which the Option would not otherwise be exercisable.  In
addition, the Administrator may provide that any Company repurchase option
applicable to any Shares purchased upon exercise of an Option shall lapse as to
all such Shares, provided the proposed dissolution or liquidation takes place
at the time and in the manner contemplated.  To the extent it has not been
previously exercised, an Option will terminate immediately prior to the
consummation of such proposed action.

                 (c)      MERGER OR ASSET SALE.  In the event of a merger of
the Company with or into another corporation, or the sale of substantially all
of the assets of the Company, each outstanding





                                      -11-
<PAGE>   12
Option and Stock Purchase Right shall be assumed or an equivalent option or
right substituted by the successor corporation or a Parent or Subsidiary of the
successor corporation.  In the event that the successor corporation refuses to
assume or substitute for the Option or Stock Purchase Right, the Optionee shall
have the right to exercise the Option or Stock Purchase Right as to all of the
Optioned Stock, including Shares as to which it would not otherwise be
exercisable.  If an Option or Stock Purchase Right is exercisable in lieu of
assumption or substitution in the event of a merger or sale of assets, the
Administrator shall notify the Optionee that the Option or Stock Purchase Right
shall be fully exercisable for a period of fifteen (15) days from the date of
such notice, and the Option or Stock Purchase Right shall terminate upon the
expiration of such period.  For the purposes of this paragraph, the Option or
Stock Purchase Right shall be considered assumed if, following the merger or
sale of assets, the option or right confers the right to purchase or receive,
for each Share of Optioned Stock subject to the Option or Stock Purchase Right
immediately prior to the merger or sale of assets, the consideration (whether
stock, cash, or other securities or property) received in the merger or sale of
assets by holders of Common Stock for each Share held on the effective date of
the transaction (and if holders were offered a choice of consideration, the
type of consideration chosen by the holders of a majority of the outstanding
Shares); provided, however, that if such consideration received in the merger
or sale of assets was not solely common stock of the successor corporation or
its Parent, the Administrator may, with the consent of the successor
corporation, provide for the consideration to be received upon the exercise of
the Option or Stock Purchase Right, for each Share of Optioned Stock subject to
the Option or Stock Purchase Right, to be solely common stock of the successor
corporation or its Parent equal in fair market value to the per share
consideration received by holders of Common Stock in the merger or sale of
assets.

         15.     TIME OF GRANTING OPTIONS.  The date of grant of an Option or
Stock Purchase Right shall, for all purposes, be the date on which the
Administrator makes the determination granting such Option or Stock Purchase
Right, or such other date as is determined by the Board.  Notice of the
determination shall be given to each Employee or Consultant to whom an Option
or Stock Purchase Right is so granted within a reasonable time after the date
of such grant.

         16.     AMENDMENT AND TERMINATION OF THE PLAN.  The Board may at any
time amend, alter, suspend or discontinue the Plan, but no amendment,
alteration, suspension or discontinuation shall be made which would impair the
rights of any Optionee under any grant theretofore made, without his or her
consent.  In addition, to the extent necessary and desirable to comply with
Rule 16b-3 under the Exchange Act or with Section 422 of the Code (or any other
applicable law or regulation, including the requirements of the NASD of an
established stock exchange), the Company shall obtain stockholder approval of
any Plan amendment in such a manner and to such a degree as required.

         17.     CONDITIONS UPON ISSUANCE OF SHARES.  Shares shall not be
issued pursuant to the exercise of an Option unless the exercise of such Option
and the issuance and delivery of such Shares pursuant thereto shall comply with
all relevant provisions of law, including, without limitation, the Securities
Act of 1933, as amended, the Exchange Act, the rules and regulations
promulgated thereunder, and the requirements of any stock exchange upon which
the Shares may then be listed,





                                      -12-
<PAGE>   13
and shall be further subject to the approval of counsel for the Company with
respect to such compliance.



         18.     RESERVATION OF SHARES.  The Company, during the term of this
Plan, shall at all times reserve and keep available such number of Shares as
shall be sufficient to satisfy the requirements of the Plan.

                 The inability of the Company to obtain authority from any
regulatory body having jurisdiction, which authority is deemed by the Company's
counsel to be necessary to the lawful issuance and sale of any Shares
hereunder, shall relieve the Company of any liability in respect of the failure
to issue or sell such Shares as to which such requisite authority shall not
have been obtained.

         19.     AGREEMENTS.  Options and Stock Purchase Rights shall be
evidenced by written agreements in such form as the Board shall approve from
time to time.

         20.     STOCKHOLDER APPROVAL.  Continuance of the Plan shall be
subject to approval by the stockholder of the Company within twelve (12) months
before or after the date the Plan is adopted.  Such stockholder approval shall
be obtained in the degree and manner required under applicable state and
federal law.





                                      -13-

<PAGE>   1
                                                                     Exhibit 4.3

                          CARDIAC PATHWAYS CORPORATION

                           1996 DIRECTOR OPTION PLAN


         1.      Purposes of the Plan.  The purposes of this 1996 Director
Option Plan are to attract and retain the best available personnel for service
as Outside Directors (as defined herein) of the Company, to provide additional
incentive to the Outside Directors of the Company to serve as Directors, and to
encourage their continued service on the Board.

                 All options granted hereunder shall be nonstatutory stock
options.

         2.      Definitions.  As used herein, the following definitions shall
apply:

                 (a)      "Board" means the Board of Directors of the Company.

                 (b)      "Code" means the Internal Revenue Code of 1986, as
amended.

                 (c)      "Common Stock" means the Common Stock of the Company.

                 (d)      "Company" means Cardiac Pathways Corporation, a
California corporation.

                 (e)      "Director" means a member of the Board.

                 (f)      "Employee" means any person, including officers and
Directors, employed by the Company or any Parent or Subsidiary of the Company.
The payment of a Director's fee by the Company shall not be sufficient in and
of itself to constitute "employment" by the Company.

                 (g)      "Exchange Act" means the Securities Exchange Act of
1934, as amended.

                 (h)      "Fair Market Value" means, as of any date, the value
of Common Stock determined as follows:

                          (i)     If the Common Stock is listed on any
established stock exchange or a national market system, including without
limitation the Nasdaq National Market or The Nasdaq SmallCap Market of The
Nasdaq Stock Market, its Fair Market Value shall be the closing sales price for
such stock (or the closing bid, if no sales were reported) as quoted on such
exchange or system for the last market trading day prior to the time of
determination, as reported in The Wall Street Journal or such other source as
the Administrator deems reliable;

                          (ii)    If the Common Stock is regularly quoted by a
recognized securities dealer but selling prices are not reported, the Fair
Market Value of a Share of Common Stock shall be the mean between the high bid
and low asked prices for the Common Stock on the date of determination, as
reported in The Wall Street Journal or such other source as the Board deems
reliable, or;
<PAGE>   2
                          (iii)   In the absence of an established market for
the Common Stock, the Fair Market Value thereof shall be determined in good
faith by the Board.

                 (i)      "Inside Director" means a Director who is an
Employee.

                 (j)      "Option" means a stock option granted pursuant to the
Plan.

                 (k)      "Optioned Stock" means the Common Stock subject to an
Option.

                 (l)      "Optionee"  means a Director who holds an Option.

                 (m)      "Outside Director" means a Director who is not an
Employee.

                 (n)      "Parent" means a "parent corporation," whether now or
hereafter existing, as defined in Section 424(e) of the Code.

                 (o)      "Plan" means this 1996 Director Option Plan.

                 (p)      "Share" means a share of the Common Stock, as
adjusted in accordance with Section 10 of the Plan.

                 (q)      "Subsidiary" means a "subsidiary corporation,"
whether now or hereafter existing, as defined in Section 424(f) of the Internal
Revenue Code of 1986.

         3.      Stock Subject to the Plan.  Subject to the provisions of
Section 10 of the Plan, the maximum aggregate number of Shares which may be
optioned and sold under the Plan is 40,000 Shares of Common Stock (the "Pool").
The Shares may be authorized, but unissued, or reacquired Common Stock.

                 If an Option expires or becomes unexercisable without having
been exercised in full, the unpurchased Shares which were subject thereto shall
become available for future grant or sale under the Plan (unless the Plan has
terminated).  Shares that have actually been issued under the Plan shall not be
returned to the Plan and shall not become available for future distribution
under the Plan.

         4.      Administration and Grants of Options under the Plan.

                 (a)      Procedure for Grants.  The provisions set forth in
this Section 4(a) shall not be amended more than once every six months, other
than to comport with changes in the Code, the Employee Retirement Income
Security Act of 1974, as amended, or the rules thereunder.  All grants of
Options to Outside Directors under this Plan shall be automatic and
nondiscretionary and shall be made strictly in accordance with the following
provisions:


                                       -2-
<PAGE>   3
                          (i)     No person shall have any discretion to select
which Outside Directors shall be granted Options or to determine the number of
Shares to be covered by Options granted to Outside Directors.

                          (ii)    Each Outside Director who is neither
affiliated with or nominated by a stockholder that owns one percent (1%) or
more of the outstanding capital stock of the Company (an "Unaffiliated Outside
Director") shall automatically be granted an Option to purchase 13,000 Shares
(the "First Option") on the date on which the later of the following events
occurs:  (A) the effective date of this Plan, as determined in accordance with
Section 6 hereof, or (B) the date on which such person first becomes an Outside
Director, whether through election by the stockholders of the Company or
appointment by the Board to fill a vacancy.  No Inside Director who ceases to
be an Inside Director but who remains a Director shall receive a First Option.
No Outside Director who upon first becoming an Outside Director is not an
Unaffiliated Outside Director but who subsequently becomes an Unaffiliated
Outside Director shall thereby become eligible to receive a First Option.

                          (iii)   Each Outside Director, whether or not an
Unaffiliated Outside Director, shall be automatically granted an Option to
purchase 700 Shares (a "Subsequent Option") each year on the date of the annual
meeting of the stockholders of the Company, provided he or she is then an
Outside Director and if as of such date, he or she shall have served on the
Board for at least the preceding six (6) months.

                          (iv)    Notwithstanding the provisions of subsections
(ii) and (iii) hereof, any exercise of an Option granted before the Company has
obtained stockholder approval of the Plan in accordance with Section 16 hereof
shall be conditioned upon obtaining such stockholder approval of the Plan in
accordance with Section 16 hereof.

                          (v)     The terms of a First Option granted hereunder
shall be as follows:

                                  (A)      the term of the First Option shall
be ten (10) years.

                                  (B)      the First Option shall be
exercisable only while the Outside Director remains a Director of the Company,
except as set forth in Sections 8 and 10 hereof.

                                  (C)      the exercise price per Share shall
be 100% of the Fair Market Value per Share on the date of grant of the First
Option.  In the event that the date of grant of the First Option is not a
trading day, the exercise price per Share shall be the Fair Market Value on the
next trading day immediately following the date of grant of the First Option.

                                  (D)      subject to Section 10 hereof, the
First Option shall become exercisable as to twenty-five percent (25%) of the
Shares subject to the First Option one (1) year after its date of grant, and as
to an additional one forty-eighth (1/48th) of the shares at the end of each
month thereafter, provided that the Optionee continues to serve as a Director
on such dates.





                                      -3-
<PAGE>   4
                          (vi)    The terms of a Subsequent Option granted
hereunder shall be as follows:

                                  (A)      the term of the Subsequent Option
shall be ten (10) years.

                                  (B)      the Subsequent Option shall be
exercisable only while the Outside Director remains a Director of the Company,
except as set forth in Sections 8 and 10 hereof.

                                  (C)      the exercise price per Share shall
be 100% of the Fair Market Value per Share on the date of grant of the
Subsequent Option.  In the event that the date of grant of the Subsequent
Option is not a trading day, the exercise price per Share shall be the Fair
Market Value on the next trading day immediately following the date of grant of
the Subsequent Option.

                                  (D)      subject to Section 10 hereof, the
Subsequent Option shall become exercisable as to one-eighth (1/8th) of the
Shares subject to the Subsequent Option six (6) months after its date of grant,
and as to an additional one forty-eighth (1/48th) at the end of each month
thereafter, provided that the Optionee continues to serve as a Director on such
dates.

                          (vii)   In the event that any Option granted under
the Plan would cause the number of Shares subject to outstanding Options plus
the number of Shares previously purchased under Options to exceed the Pool,
then the remaining Shares available for Option grant shall be granted under
Options to the Outside Directors on a pro rata basis.  No further grants shall
be made until such time, if any, as additional Shares become available for
grant under the Plan through action of the Board or the stockholders to
increase the number of Shares which may be issued under the Plan or through
cancellation or expiration of Options previously granted hereunder.

         5.      Eligibility.  Options may be granted only to Outside
Directors.  All Options shall be automatically granted in accordance with the
terms set forth in Section 4 hereof.

                 The Plan shall not confer upon any Optionee any right with
respect to continuation of service as a Director or nomination to serve as a
Director, nor shall it interfere in any way with any rights which the Director
or the Company may have to terminate the Director's relationship with the
Company at any time.

         6.      Term of Plan.  The Plan shall become effective upon the
earlier to occur of its adoption by the Board or its approval by the
stockholders of the Company as described in Section 16 of the Plan.  It shall
continue in effect for a term of ten (10) years unless sooner terminated under
Section 11 of the Plan.

         7.      Form of Consideration.  The consideration to be paid for the
Shares to be issued upon exercise of an Option, including the method of
payment, shall consist of (i) cash, (ii) check, (iii) other shares which (x) in
the case of Shares acquired upon exercise of an Option, have been owned by the
Optionee for more than six (6) months on the date of surrender, and (y) have a
Fair Market Value on the date of surrender equal to the aggregate exercise
price of the Shares as to which said Option shall





                                      -4-
<PAGE>   5
be exercised, (iv) delivery of a properly executed exercise notice together
with such other documentation as the Company and the broker, if applicable,
shall require to effect an exercise of the Option and delivery to the Company
of the sale or loan proceeds required to pay the exercise price, or (v) any
combination of the foregoing methods of payment.

         8.      Exercise of Option.

                 (a)      Procedure for Exercise; Rights as a Stockholder. Any
Option granted hereunder shall be exercisable at such times as are set forth in
Section 4 hereof; provided, however, that no Options shall be exercisable until
stockholder approval of the Plan in accordance with Section 16 hereof has been
obtained.

                 An Option may not be exercised for a fraction of a Share.

                 An Option shall be deemed to be exercised when written notice
of such exercise has been given to the Company in accordance with the terms of
the Option by the person entitled to exercise the Option and full payment for
the Shares with respect to which the Option is exercised has been received by
the Company.  Full payment may consist of any consideration and method of
payment allowable under Section 7 of the Plan.  Until the issuance (as
evidenced by the appropriate entry on the books of the Company or of a duly
authorized transfer agent of the Company) of the stock certificate evidencing
such Shares, no right to vote or receive dividends or any other rights as a
stockholder shall exist with respect to the Optioned Stock, notwithstanding the
exercise of the Option.  A share certificate for the number of Shares so
acquired shall be issued to the Optionee as soon as practicable after exercise
of the Option. No adjustment shall be made for a dividend or other right for
which the record date is prior to the date the stock certificate is issued,
except as provided in Section 10 of the Plan.

                 Exercise of an Option in any manner shall result in a decrease
in the number of Shares which thereafter may be available, both for purposes of
the Plan and for sale under the Option, by the number of Shares as to which the
Option is exercised.

                 (b)      Rule 16b-3.  Options granted to Outside Directors
must comply with the applicable provisions of Rule 16b-3 promulgated under the
Exchange Act or any successor thereto and shall contain such additional
conditions or restrictions as may be required thereunder to qualify Plan
transactions, and other transactions by Outside Directors that otherwise could
be matched with Plan transactions, for the maximum exemption from Section 16 of
the Exchange Act.

                 (c)      Termination of Continuous Status as a Director.
Subject to Section 10 hereof, in the event an Optionee's status as a Director
terminates (other than upon the Optionee's death or total and permanent
disability (as defined in Section 22(e)(3) of the Code)), the Optionee may
exercise his or her Option, but only within three (3) months following the date
of such termination, and only to the extent that the Optionee was entitled to
exercise it on the date of such termination (but in no event later than the
expiration of its ten (10) year term).  To the extent that the





                                      -5-
<PAGE>   6
Optionee was not entitled to exercise an Option on the date of such
termination, and to the extent that the Optionee does not exercise such Option
(to the extent otherwise so entitled) within the time specified herein, the
Option shall terminate.

                 (d)      Disability of Optionee.  In the event Optionee's
status as a Director terminates as a result of total and permanent disability
(as defined in Section 22(e)(3) of the Code), the Optionee may exercise his or
her Option, but only within twelve (12) months following the date of such
termination, and only to the extent that the Optionee was entitled to exercise
it on the date of such termination (but in no event later than the expiration
of its ten (10) year term).  To the extent that the Optionee was not entitled
to exercise an Option on the date of termination, or if he or she does not
exercise such Option (to the extent otherwise so entitled) within the time
specified herein, the Option shall terminate.

                 (e)      Death of Optionee.  In the event of an Optionee's
death, the Optionee's estate or a person who acquired the right to exercise the
Option by bequest or inheritance may exercise the Option, but only within
twelve (12) months following the date of death, and only to the extent that the
Optionee was entitled to exercise it on the date of death (but in no event
later than the expiration of its ten (10) year term).  To the extent that the
Optionee was not entitled to exercise an Option on the date of death, and to
the extent that the Optionee's estate or a person who acquired the right to
exercise such Option does not exercise such Option (to the extent otherwise so
entitled) within the time specified herein, the Option shall terminate.

         9.      Non-Transferability of Options.  The Option may not be sold,
pledged, assigned, hypothecated, transferred, or disposed of in any manner
other than by will or by the laws of descent or distribution and may be
exercised, during the lifetime of the Optionee, only by the Optionee.

         10.     Adjustments Upon Changes in Capitalization, Dissolution,
Merger or Asset Sale.

                 (a)      Changes in Capitalization.  Subject to any required
action by the stockholders of the Company, the number of Shares covered by each
outstanding Option, the number of Shares which have been authorized for
issuance under the Plan but as to which no Options have yet been granted or
which have been returned to the Plan upon cancellation or expiration of an
Option, as well as the price per Share covered by each such outstanding Option,
and the number of Shares issuable pursuant to the automatic grant provisions of
Section 4 hereof shall be proportionately adjusted for any increase or decrease
in the number of issued Shares resulting from a stock split, reverse stock
split, stock dividend, combination or reclassification of the Common Stock, or
any other increase or decrease in the number of issued Shares effected without
receipt of consideration by the Company; provided, however, that conversion of
any convertible securities of the Company shall not be deemed to have been
"effected without receipt of consideration."  Except as expressly provided
herein, no issuance by the Company of shares of stock of any class, or
securities convertible into shares of stock of any class, shall affect, and no
adjustment by reason thereof shall be made with respect to, the number or price
of Shares subject to an Option.





                                      -6-
<PAGE>   7
                 (b)      Dissolution or Liquidation.  In the event of the
proposed dissolution or liquidation of the Company, to the extent that an
Option has not been previously exercised, it shall terminate immediately prior
to the consummation of such proposed action.

                 (c)      Merger or Asset Sale.  In the event of a merger of
the Company with or into another corporation or the sale of substantially all
of the assets of the Company, outstanding Options may be assumed or equivalent
options may be substituted by the successor corporation or a Parent or
Subsidiary thereof (the "Successor Corporation").  If an Option is assumed or
substituted for, the Option or equivalent option shall continue to be
exercisable as provided in Section 4 hereof for so long as the Optionee serves
as a Director or a director of the Successor Corporation.  Following such
assumption or substitution, if the Optionee's status as a Director or director
of the Successor Corporation, as applicable, is terminated other than upon a
voluntary resignation by the Optionee, the Option or option shall become fully
exercisable, including as to Shares for which it would not otherwise be
exercisable.  Thereafter, the Option or option shall remain exercisable in
accordance with Sections 8(c) through (e) above.

         If the Successor Corporation does not assume an outstanding Option or
substitute for it an equivalent option, the Option shall become fully vested
and exercisable, including as to Shares for which it would not otherwise be
exercisable.  In such event the Board shall notify the Optionee that the Option
shall be fully exercisable for a period of thirty (30) days from the date of
such notice, and upon the expiration of such period the Option shall terminate.

         For the purposes of this Section 10(c), an Option shall be considered
assumed if, following the merger or sale of assets, the Option confers the
right to purchase or receive, for each Share of Optioned Stock subject to the
Option immediately prior to the merger or sale of assets, the consideration
(whether stock, cash, or other securities or property) received in the merger
or sale of assets by holders of Common Stock for each Share held on the
effective date of the transaction (and if holders were offered a choice of
consideration, the type of consideration chosen by the holders of a majority of
the outstanding Shares).

         11.     Amendment and Termination of the Plan.

                 (a)      Amendment and Termination.  Except as set forth in
Section 4, the Board may at any time amend, alter, suspend, or discontinue the
Plan, but no amendment, alteration, suspension, or discontinuation shall be
made which would impair the rights of any Optionee under any grant theretofore
made, without his or her consent.  In addition, to the extent necessary and
desirable to comply with Rule 16b-3 under the Exchange Act (or any other
applicable law or regulation), the Company shall obtain stockholder approval of
any Plan amendment in such a manner and to such a degree as required.

                 (b)      Effect of Amendment or Termination.  Any such
amendment or termination of the Plan shall not affect Options already granted
and such Options shall remain in full force and effect as if this Plan had not
been amended or terminated.





                                      -7-
<PAGE>   8
         12.     Time of Granting Options.  The date of grant of an Option
shall, for all purposes, be the date determined in accordance with Section 4
hereof.

         13.     Conditions Upon Issuance of Shares.  Shares shall not be
issued pursuant to the exercise of an Option unless the exercise of such Option
and the issuance and delivery of such Shares pursuant thereto shall comply with
all relevant provisions of law, including, without limitation, the Securities
Act of 1933, as amended, the Exchange Act, the rules and regulations
promulgated thereunder, state securities laws, and the requirements of any
stock exchange upon which the Shares may then be listed, and shall be further
subject to the approval of counsel for the Company with respect to such
compliance.

                 As a condition to the exercise of an Option, the Company may
require the person exercising such Option to represent and warrant at the time
of any such exercise that the Shares are being purchased only for investment
and without any present intention to sell or distribute such Shares, if, in the
opinion of counsel for the Company, such a representation is required by any of
the aforementioned relevant provisions of law.

                 Inability of the Company to obtain authority from any
regulatory body having jurisdiction, which authority is deemed by the Company's
counsel to be necessary to the lawful issuance and sale of any Shares
hereunder, shall relieve the Company of any liability in respect of the failure
to issue or sell such Shares as to which such requisite authority shall not
have been obtained.

         14.     Reservation of Shares.  The Company, during the term of this
Plan, will at all times reserve and keep available such number of Shares as
shall be sufficient to satisfy the requirements of the Plan.

         15.     Option Agreement.  Options shall be evidenced by written
option agreements in such form as the Board shall approve.

         16.     Stockholder Approval.  Continuance of the Plan shall be
subject to approval by the stockholders of the Company at or prior to the first
annual meeting of stockholders held subsequent to the granting of an Option
hereunder.  Such stockholder approval shall be obtained in the degree and
manner required under applicable state and federal law.





                                      -8-

<PAGE>   1
                                                                Exhibit 5.1

                        WILSON SONSINI GOODRICH & ROSATI
                            PROFESSIONAL CORPORATION


                               650 PAGE MILL ROAD
                        PALO ALTO, CALIFORNIA 94304-1050
                  TELEPHONE 650-493-9300 FACSIMILE 650-493-6811


                                                            JOHN ARNOT WILSON
                                                                 RETIRED




                                October 16, 1997


Cardiac Pathways Corporation
995 Benecia Avenue
Sunnyvale, CA 94086


          RE: REGISTRATION STATEMENT ON FORM S-8

Ladies and Gentlemen:

          We have examined the Registration Statement on Form S-8 to be filed by
you with the Securities and Exchange Commission on October 16, 1997 (the
"Registration Statement") in connection with the registration under the
Securities Act of 1933, as amended, of an aggregate of 470,000 shares of your
Common Stock, par value $0.001 per share (the "Shares"), (i) 380,000 shares of
which are to be issued pursuant to the 1991 Stock Plan, (ii) 20,000 shares of
which are to be issued pursuant to the 1996 Director Option Plan and (iii)
70,000 shares of which are to be issued pursuant to the 1996 Employee Stock
Purchase Plan (collectively, the "Plans"). As your counsel in connection with
this transaction, we have examined the proceedings taken and are familiar with
the proceedings proposed to be taken by you in connection with the issuance and
sale of the Shares pursuant to the Plans.

          It is our opinion that, when issued and sold in the manner described
in the Plans and pursuant to the agreements which accompany each grant under the
Plans, the Shares will be legally and validly issued, fully-paid and
non-assessable.

          We consent to the use of this opinion as an exhibit to the
Registration Statement, and further consent to the use of our name wherever
appearing in the Registration Statement and any amendments thereto.



                                         Very truly yours,

                                         WILSON SONSINI GOODRICH & ROSATI

                                         /s/ Wilson Sonsini Goodrich & Rosati



<PAGE>   1

                                                                   Exhibit 23.1



               CONSENT OF ERNST & YOUNG LLP, INDEPENDENT AUDITORS


          We consent to the incorporation by reference in the Registration
Statement (Form S-8) pertaining to the 1996 Employee Stock Purchase Plan, 1996
Director Option Plan and 1991 Stock Plan of Cardiac Pathways Corporation of our
report dated July 30, 1997, with respect to the financial statements of Cardiac
Pathways Corporation included in its Annual Report (Form 10-K) for the year
ended June 30, 1997, filed with the Securities and Exchange Commission.


                                                      /s/ Ernst & Young LLP


San Jose, California
October 15, 1997










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