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                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549
                            ------------------------
                                  SCHEDULE TO
            Tender Offer Statement Under Section 14(d)(1) or 13(e)(1)
                     of the Securities Exchange Act of 1934

                                (Amendment No. 1)
                            ------------------------
                          CARDIAC PATHWAYS CORPORATION
                            (Name of Subject Company)
                            ------------------------
                           ADAM ACQUISITION 2001 INC.
                          BOSTON SCIENTIFIC CORPORATION
            (Names of Filing Persons (identifying status as offeror,
                            issuer or other person))
                            ------------------------

                     Common Stock, Par Value $.001 Per Share
           (Including the Associated Preferred Share Purchase Rights)
                         (Title of Class of Securities)
                            ------------------------
                                   141408 10 4
                      (CUSIP Number of Class of Securities)

         Lawrence J. Knopf                              Lawrence J. Knopf
   Boston Scientific Corporation                    Adam Acquisition 2001 Inc.
    One Boston Scientific Place                    One Boston Scientific Place
       Natick, MA 01760-1537                          Natick, MA 01760-1537
           (508) 650-8567                                 (508) 650-8567
  (Name, Address and Telephone Number of Persons Authorized to Receive Notices
                and Communications on Behalf of filing persons)
                            ------------------------
                                   Copies to:

                                  Clare O'Brien
                               Shearman & Sterling
                              599 Lexington Avenue
                            New York, New York 10022
                                 (212) 848-4000


                            CALCULATION OF FILING FEE

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         Transaction Valuation*                 Amount of Filing Fee**
- --------------------------------------------------------------------------------
             $50,250,375.47                          $10,050.08
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*    Estimated for purposes of calculating the amount of the filing fee only.
     The fee was calculated by multiplying $5.267, the per share tender offer
     price, by the 9,052,243 currently outstanding shares of Common Stock sought
     in the Offer, which gives an aggregate consideration of $47,678,163.88 (the
     "Common Stock Consideration"). The Common Stock Consideration was then
     added to $2,572,211.59, being the net consideration for the Subject
     Company's 1,907,831 in-the-money employee stock options and the 96,924
     rights to purchase shares of Common Stock that may be issued pursuant to
     the Subject Company's employee stock purchase plan to arrive at a total
     transaction value of $50,250,375.47.

**   Calculated as 1/50 of 1% of the transaction value.

[X]  Check the box if any part of the fee is offset as provided by Rule
     0-11(a)(2) and identify the filing with which the offsetting fee was
     previously paid. Identify the previous filing by registration statement
     number, or the Form or Schedule and the date of its filing.




                                           
Amount Previously Paid:   $10,050.08             Filing Party: Boston Scientific Corporation,
                                                               Adam Acquisition 2001 Inc.
                          ----------------                    -------------------------------
Form or Registration No.: Schedule TO            Date Filed:    July 10, 2001
                          ----------------                  ---------------------------------


Check the box if the filing relates solely to preliminary communications made
before the commencement of a tender offer.

Check the appropriate boxes to designate any transactions to which the statement
relates:

[X]  third-party tender offer subject to Rule 14d-1.

[ ]  issuer tender offer subject to Rule 13c-4

[ ]  going-private transaction subject to Rule13e-3.

[ ]  amendment to Schedule 13D under Rule 13d-2.

Check the following box if the filing is a final amendment reporting the results
of the tender offer. [ ]
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         This Amendment No. 1 (the "Amendment") amends and supplements the
Tender Offer Statement on Schedule TO filed with the Securities and Exchange
Commission on July 10, 2001 (the "Schedule TO"), by Adam Acquisition 2001 Inc.,
a Delaware corporation ("Purchaser"), and a wholly owned subsidiary of Boston
Scientific Corporation, a Delaware corporation ("Parent"). This Schedule TO
relates to the offer by Purchaser to purchase all outstanding shares of common
stock, par value $0.001 per share, including the associated preferred share
purchase rights (together, the "Shares"), of Cardiac Pathways Corporation, a
Delaware corporation (the "Company"), at a purchase price of $5.267 per Share,
net to the seller in cash, upon the terms and subject to the conditions set
forth in the Offer to Purchase dated July 10, 2001 (the "Offer to Purchase") and
in the related Letter of Transmittal (which, together with the Offer to Purchase
and any amendments or supplements hereto and thereto, collectively constitute
the "Offer"). Capitalized terms used and not defined herein shall have the
meanings ascribed to such terms in the Offer to Purchase or in the Schedule TO.

Item 11.      Additional Information.

              Item 11 of the Schedule TO is hereby amended and supplemented by
the following:

         The waiting period with respect to Offer by Purchaser under the
Hart-Scott-Rodino Antitrust Improvements Act of 1976 (the "HSR Act") expired at
11:59 p.m. on July 26, 2001. Accordingly, all applicable domestic and foreign
antitrust obligations have been complied with and the condition to the Offer
requiring the expiration or termination of the waiting period under the HSR Act
has been satisfied.

Item 12.      Exhibits.

         (a)(5)(iv)      Press Release issued by Parent and the Company on
                         July 31, 2001.






         After due 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:  July 31, 2001

                                         ADAM ACQUISITION 2001 INC.



                                         By    /s/  Lawrence J. Knopf
                                            ------------------------------------
                                            Name:   Lawrence J. Knopf
                                            Title:  Vice President

         After due 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:  July 31, 2001

                                         BOSTON SCIENTIFIC CORPORATION



                                         By    /s/  Lawrence J. Knopf
                                            ------------------------------------
                                            Name:   Lawrence J. Knopf
                                            Title:  Assistant General Counsel







                                  EXHIBIT INDEX

 Exhibit  No.
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(a)(1)(i)        Offer to Purchase dated July 10, 2001.*

(a)(1)(ii)       Form of Letter of Transmittal.*

(a)(1)(iii)      Form of Notice of Guaranteed Delivery. *

(a)(1)(iv)       Form of Letter to Brokers, Dealers, Commercial Banks, Trust
                 Companies and Other Nominees. *

(a)(1)(v)        Form of Letter from Brokers, Dealers, Commercial Banks, Trust
                 Companies and Nominees to Clients. *

(a)(1)(vi)       Form of Guidelines for Certification of Taxpayer Identification
                 Number on Substitute Form W-9. *

(a)(1)(vii)      Summary Advertisement as published in The New York Times on
                 July 10, 2001. *

(a)(5)(i)        Press Release issued by Parent on June 29, 2001 (incorporated
                 by reference to exhibit 99.1 of the Schedule TO-C filed by
                 Parent on June 29, 2001).

(a)(5)(ii)       Communication by Parent to employees on June 29, 2001
                 (incorporated by reference to exhibit 99.2 of the Schedule TO-C
                 filed by Parent on June 29, 2001).

(a)(5)(iii)      Transcript of Analyst Call held by Parent on June 29, 2001
                 (incorporated by reference to exhibit 99.3 of the Schedule TO-C
                 Amendment filed by Parent on July 6, 2001).

(a)(5)(iv)       Press Release issued by Parent and the Company on July 31,
                 2001.

(d)(i)           Agreement and Plan of Merger, dated as of June 28, 2001, among
                 Parent, Purchaser and the Company (incorporated by reference to
                 exhibit 1 of the Schedule 13D filed by Parent on July 9, 2001).

(d)(ii)          Stock Purchase Agreement, dated as of June 28, 2001, among
                 Parent and certain holders of the Company's preferred stock
                 (incorporated by reference to exhibit 2 of the Schedule 13D
                 filed by Parent on July 9, 2001).

(d)(iii)         Stockholder Agreement, dated as of June 28, 2001, among Parent,
                 Purchaser and Van Wagoner Funds, Inc. (incorporated by
                 reference to exhibit 3 of the Schedule 13D filed by Parent on
                 July 9, 2001).

(d)(iv)          Stockholders Agreement, dated as of June 28, 2001, among
                 Parent, Purchaser and certain members of management of the
                 Company (incorporated by reference to exhibit 4 of the Schedule
                 13D filed by Parent on July 9, 2001).



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*  Incorporated by reference to Parent's Schedule TO, filed July 10, 2001.