HEARTPORT INC
SC 13G, 1997-02-14
SURGICAL & MEDICAL INSTRUMENTS & APPARATUS
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                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                  Schedule 13G

                    Under the Securities Exchange Act of 1934
                                (Amendment No. )*

                                 Heartport, Inc.
       -----------------------------------------------------------------
                                (Name of Issuer)


                                  Common Stock
       -----------------------------------------------------------------
                         (Title of Class of Securities)


                                   421969 10 6
       -----------------------------------------------------------------
                                 (CUSIP Number)

Check the following box if a fee is being paid with this statement.  [ ]. (A fee
is not  required  if the filing  person:  (1) has a previous  statement  on file
reporting  beneficial  ownership  of more  than  five  percent  of the  class of
securities  described  in Item 1;  and (2) has  filed  no  amendment  subsequent
thereto reporting  beneficial  ownership of five percent or less of such class.)
(See Rule 13d-7).

*The  remainder of this cover page shall be filled out for a reporting  person's
initial filing on this form with respect to the subject class of securities, and
for  any  subsequent   amendment   containing   information  which  would  alter
disclosures provided in a prior cover page.

The information required on the remainder of this cover page shall not be deemed
to be "filed" for the purpose of Section 18 of the  Securities  Exchange  Act of
1934 ("Act") or otherwise  subject to the liabilities of that section of the Act
but  shall be  subject  to all other  provisions  of the Act  (however,  see the
Notes).

                         (Continued on following pages)

                                Page 1 of 9 Pages
                        Exhibit Index Contained on Page 7

<PAGE>

- ---------------------------                          ---------------------------
CUSIP No. 421969 10 6                  13G                  Page 2 of 9 Pages
- ---------------------------                          ---------------------------

- -------- -----------------------------------------------------------------------
   1     NAME OF REPORTING PERSONS
         S.S. or I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS
                      Sierra Ventures IV, a California
                         Limited Partnership ("Sierra IV") 94-3137106
- -------- -----------------------------------------------------------------------
   2     CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*             (a)   [ ]
                                                                       (b)   [X}
- -------- -----------------------------------------------------------------------
   3     SEC USE ONLY

- -------- -----------------------------------------------------------------------
   4     CITIZENSHIP OR PLACE OF ORGANIZATION
                California Limited Partnership
- -------- -----------------------------------------------------------------------
   NUMBER OF       5     SOLE VOTING POWER
    SHARES                                                                 - 0 -
 BENEFICIALLY    ------- -------------------------------------------------------
OWNED BY EACH      6     SHARED VOTING POWER                                    
  REPORTING                                                            1,548,095
   PERSON        ------- -------------------------------------------------------
    WITH           7     SOLE DISPOSITIVE POWER                                 
                                                                           - 0 -
                 ------- -------------------------------------------------------
                   8     SHARED DISPOSITIVE POWER                               
                                                                       1,548,095
- -------- -----------------------------------------------------------------------
   9     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
                                                                       1,548,095
- -------- -----------------------------------------------------------------------
   10    CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* 
                                                                             [ ]
- -------- -----------------------------------------------------------------------
   11    PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
                                                                            6.3%
- -------- -----------------------------------------------------------------------
   12    TYPE OF REPORTING PERSON*
                                                                              PN
- -------- -----------------------------------------------------------------------
                     *SEE INSTRUCTIONS BEFORE FILLING OUT!



<PAGE>

- ---------------------------                          ---------------------------
CUSIP No. 421969 10 6                  13G                  Page 3 of 9 Pages
- ---------------------------                          ---------------------------

- -------- -----------------------------------------------------------------------
   1     NAME OF REPORTING PERSONS
         S.S. or I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS
                      SV Associates IV, L.P.
                         ("SV Associates") 94-3137105
- -------- -----------------------------------------------------------------------
   2     CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*             (a)   [ ]
                                                                       (b)   [X}
- -------- -----------------------------------------------------------------------
   3     SEC USE ONLY

- -------- -----------------------------------------------------------------------
   4     CITIZENSHIP OR PLACE OF ORGANIZATION
                California Limited Partnership
- -------- -----------------------------------------------------------------------
   NUMBER OF       5     SOLE VOTING POWER
    SHARES                                                                 - 0 -
 BENEFICIALLY    ------- -------------------------------------------------------
OWNED BY EACH      6     SHARED VOTING POWER                                    
  REPORTING              1,609,999 shares of which 1,548,095 shares are directly
   PERSON                owned by Sierra IV and 61,904 shares are directly owned
    WITH                 by  Sierra  IV  International.  SV  Associates  is  the
                         general   partner   of   Sierra   IV  and   Sierra   IV
                         International.                                         
                 ------- -------------------------------------------------------
                   7     SOLE DISPOSITIVE POWER                                 
                                                                           - 0 -
                 ------- -------------------------------------------------------
                   8     SHARED DISPOSITIVE POWER                               
                         1,609,999 shares of which 1,548,095 shares are directly
                         owned by Sierra IV and 61,904 shares are directly owned
                         by  Sierra  IV  International.  SV  Associates  is  the
                         general   partner   of   Sierra   IV  and   Sierra   IV
                         International.
- -------- -----------------------------------------------------------------------
   9     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
                                                                       1,609,999
- -------- -----------------------------------------------------------------------
   10    CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* 
                                                                             [ ]
- -------- -----------------------------------------------------------------------
   11    PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
                                                                            6.6%
- -------- -----------------------------------------------------------------------
   12    TYPE OF REPORTING PERSON*
                                                                              PN
- -------- -----------------------------------------------------------------------
                     *SEE INSTRUCTIONS BEFORE FILLING OUT!



<PAGE>

                                                                     Page 4 of 9

ITEM 1(A).        NAME OF ISSUER

                  Heartport, Inc.

ITEM 1(B).        ADDRESS OF ISSUER'S PRINCIPAL EXECUTIVE OFFICES

                  200 Chesapeake Drive
                  Redwood City, California  94063

ITEM 2(A)-(C).             NAME, ADDRESS AND CITIZENSHIP OF PERSONS FILING

                  This  statement  is being filed by SV  Associates  IV, L.P., a
California  limited  partnership  ("SV  Associates")  whose  principal  business
address is 3000 Sand Hill Road, Building Four, Suite 210, Menlo Park, California
94025.  SV  Associates  is general  partner to Sierra  Ventures IV, a California
Limited  Partnership  ("Sierra  IV") and Sierra  Ventures  IV  International,  a
Delaware Limited  Partnership  ("Sierra IV  International").  With respect to SV
Associates,  this statement relates only to SV Associates' indirect,  beneficial
ownership of shares of Common  Stock of  Heartport,  Inc.  (the  "Shares").  The
Shares  are held  directly  by Sierra IV and  Sierra  IV  International,  and SV
Associates  does not directly or otherwise  hold any Shares.  Management  of the
business affairs of SV Associates,  including decisions  respecting  disposition
and/or voting of the Shares,  is by majority decision of the general partners of
SV  Associates  listed on  Exhibit B hereto.  Each  individual  general  partner
disclaims beneficial ownership of the Shares.

ITEM 2(D) AND (E).  TITLE OF CLASS OF SECURITIES AND CUSIP NUMBER

                  Common Stock
                  CUSIP # 421969 10 6

ITEM 3.           Not Applicable

ITEM 4.           OWNERSHIP

                  Please see Rows 5-11 of cover pages.

ITEM 5.           OWNERSHIP OF FIVE PERCENT OR LESS OF A CLASS.

                  Not applicable.



<PAGE>

                                                                     Page 5 of 9

ITEM 6.           OWNERSHIP OF MORE THAN FIVE PERCENT ON BEHALF OF
                  ANOTHER PERSON.

                  Under   certain   circumstances   set  forth  in  the  limited
                  partnership  agreements of Sierra IV, Sierra IV  International
                  and SV  Associates,  the general and limited  partners of such
                  entities may have the right to receive  dividends from, or the
                  proceeds from the sale of shares of Common Stock of Heartport,
                  Inc. held by such entity.  No such partner's  rights relate to
                  more than five percent of the class.

ITEM 7.           IDENTIFICATION AND CLASSIFICATION OF THE SUBSIDIARY
                  WHICH ACQUIRED THE SECURITY BEING REPORTED ON BY
                  THE PARENT HOLDING COMPANY.

                  Not applicable.

ITEM 8.           IDENTIFICATION AND CLASSIFICATION OF MEMBERS OF THE
                  GROUP.

                  Not applicable.


ITEM 9.           NOTICE OF DISSOLUTION OF GROUP.

                  Not applicable.

ITEM 10.          CERTIFICATION.

                  Not applicable.




<PAGE>


                                                                     Page 6 of 9


                                   SIGNATURES

                  After  reasonable  inquiry and to the best of my knowledge and
belief,  I certify  that the  information  set forth in this  statement is true,
complete and correct.

Dated:  February 13, 1997

                               SV ASSOCIATES IV, L.P.


                               By:
                                  ---------------------------------------------
                                     Martha A. Clarke Adamson,
                                     Attorney-in-Fact for the General Partners


                               SIERRA VENTURES IV, A CALIFORNIA
                               LIMITED PARTNERSHIP

                               By SV Associates IV, L.P., its General Partner


                               By:
                                  ---------------------------------------------
                                     Martha A. Clarke Adamson,
                                     Attorney-in-Fact for the General Partners


<PAGE>


                                                                     Page 7 of 9

                                  EXHIBIT INDEX


                                                                     Found on
                                                                   Sequentially
Exhibit                                                            Numbered Page
- -------                                                            -------------
Exhibit A:  Agreement of Joint Filing                                   8

Exhibit B: List of General Partners of SV Associates IV, L.P.           9



<PAGE>


                                                                     Page 8 of 9

                                    EXHIBIT A

                            Agreement of Joint Filing

                  The  undersigned  hereby  agree that they are  filing  jointly
pursuant  to Rule  13d-1  of the Act the  statement  dated  February  13,  1997,
containing the information required by Schedule 13G, for the 1,609,999 Shares of
the Common Stock of  Heartport,  Inc.  held by Sierra  Ventures IV, a California
Limited  Partnership and Sierra Ventures IV  International,  a Delaware  Limited
Partnership.

Date:  February 13, 1997       SV ASSOCIATES IV, L.P.

                               By:
                                  ---------------------------------------------
                                     Martha A. Clarke Adamson,
                                     Attorney-in-Fact for the General Partners


                               SIERRA VENTURES IV, A CALIFORNIA
                               LIMITED PARTNERSHIP

                               By SV Associates IV, L.P., its General Partner


                               By:
                                  ---------------------------------------------
                                     Martha A. Clarke Adamson,
                                     Attorney-in-Fact for the General Partners


<PAGE>


                                                                     Page 9 of 9

                                    EXHIBIT B

                               General Partners of
                             SV Associates IV, L.P.


      Set forth below, with respect to each general partner of SV Associates IV,
L.P. is the following:  (a) name; (b) business address and (c) citizenship.

1.       (a)      Peter C. Wendell

         (b)      c/o Sierra Ventures
                  3000 Sand Hill Road
                  Building Four, Suite 210
                  Menlo Park, CA 94025

         (c)      United States Citizen


2.       (a)      Jeffrey M. Drazan

         (b)      c/o Sierra Ventures
                  3000 Sand Hill Road
                  Building Four, Suite 210
                  Menlo Park, CA 94025

         (c)      United States Citizen


3.       (a)      Petri Vainio

         (b)      c/o Sierra Ventures
                  3000 Sand Hill Road
                  Building Four, Suite 210
                  Menlo Park, CA 94025

         (c)      United States Citizen




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