EXHIBIT 10.30



                                     SECOND
                               AMENDMENT TO LEASE


         This Second  Amendment  ("Amendment")  to that certain  Industrial Real
Estate Lease dated the 5th day of August 1996,  by and between  Dixie Walker and
Ruth Waltenspiel  (herein called "Landlord") and Arterial Vascular  Engineering,
Inc., a Delaware  corporation  (herein called  "Tenant") by and between Landlord
and Tenant.  All terms used herein with their initial letter  capitalized  shall
have the same meaning as ascribed to such terms in the Lease.

                                   WITNESSETH

WHEREAS,  Landlord and Tenant have entered  into that  certain  Industrial  Real
Estate Lease dated August 5, 1996 ("Lease") covering approximately 26,129 square
feet, more or less,  ("Premises")  commonly known as Building B located on lot 2
as numbered on the map of Airport Oaks Parcel Map #86-386 filed in the office of
the county  recorder on 1/26/97  book 394 of maps pages 11 & 12,  Sonoma  County
Records,

WHEREAS,  Tenant  desires  to extend the term of the Lease on the  Premises  and
Landlord desires to extend the Lease on the Premises; and

NOW THEREFORE, Landlord and Tenant hereby agree as follows:

1.       Term:  The term of the Lease as defined  in Section  1.05 shall be Four
         (4)  years and Three (3)  months  commencing  December  1, 1996 and end
         February 28, 2001.

2.       Rent: The monthly Base Rent shall remain the same at Nineteen  Thousand
         one  Hundred  Thirteen  and  00/00  Dollars   ($19,113.00)  payable  in
         accordance  with Section  1.12 of the Lease and Adjusted in  accordance
         with Section 3.02 on 1st day of December each year  beginning  December
         1, 1998.

3.       Right Of First  Refusal:  The Right of First  Refusal  described in the
         First Amendment to Lease and Landlords Right To Show shall be continued
         through out the term of this extension.

4.       Parking:  The allocated  parking  described under Section 1.11 shall be
         increased to Fifty Nine (59) spaces  (Subject to execution of a release
         agreement from adjacent property owner for Nine (9) additional  parking
         stalls.  Should  Landlord not be able to obtain the additional Nine (9)
         spaces, the parking shall remain at Fifty (50) spaces).

All other terms and conditions of the Lease shall remain the same.


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IN WITNESS  WHEREOF,  the parties have  executed  this  Amendment as of the date
specified  adjacent to their  signatures  below and have  initialed all Exhibits
attached hereto or incorporated by reference.


         "LANDLORD"



/s/Dixie Walker                                    Date:    5/5/97
------------------------------------------              ------------------------
Dixie Walker


/s/Ruth Waltenspiel                                Date:    5/6/97
------------------------------------------              ------------------------
Ruth Waltenspiel


         "TENANT":
Arterial Vascular Engineering, Inc.


By:      /s/John D. Miller                         Date:    5/5/97
   ---------------------------------------              ------------------------
         John D. Miller, V.P. of Finance

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