<PAGE>
UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, DC 20549
SCHEDULE 13G
Under the Securities Exchange Act of 1934
(Amendment No. 1)*
Cardiac Pathways Corporation
(Name of Issuer)
Common Stock Par Value $.001
(Title of Class of Securities)
141408104
(CUSIP Number)
*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 the
disclosures provided in a prior cover page.
The information required in 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).
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Cusip No. 141408104 13G Page 2 of 18 Pages
1 Names of Reporting Persons
S.S. or I.R.S. Identification Nos. of Above Persons
Oak Investment Partners IV, Limited Partnership
06-1237975
- -------------------------------------------------------------------
2 Check the Appropriate Box if a Member of a Group (See Instructions)
(a) [ ]
(b) [ ]
- -------------------------------------------------------------------
3 SEC Use Only
- ------------------------------------------------------------------
4 Citizenship or Place of Organization
Delaware
- -------------------------------------------------------------------
Number of (5) Sole Voting Power 6,376 shares of
Shares common stock
Beneficially
Owned by (6) Shared Voting Power Not applicable
Each
Reporting (7) Sole Dispositive Power 6,376 shares of
Person common stock
With
(8) Shared Dispositive Power Not applicable
- -------------------------------------------------------------------
9 Aggregate Amount Beneficially Owned by Each
Reporting Person
6,376 shares of common stock
- -------------------------------------------------------------------
10 Check if the Aggregate Amount in Row (9) Excludes
Certain Shares (See Instructions) [ ]
- -------------------------------------------------------------------
11 Percent of Class Represented by Amount in Row 9
Less than 0.1%
- -------------------------------------------------------------------
12 Type of Reporting Person (See Instructions)
PN
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Cusip No. 141408104 13G Page 3 of 18 Pages
1 Names of Reporting Persons
S.S. or I.R.S. Identification Nos. of Above Persons
Oak Associates IV, LLC
06-1462390
- -------------------------------------------------------------------
2 Check the Appropriate Box if a Member of a Group (See Instructions)
(a) [ ]
(b) [ ]
- -------------------------------------------------------------------
3 SEC Use Only
- ------------------------------------------------------------------
4 Citizenship or Place of Organization
Delaware
- -------------------------------------------------------------------
Number of (5) Sole Voting Power Not applicable
Shares
Beneficially (6) Shared Voting Power 6,376 shares of
Owned by common stock
Each
Reporting (7) Sole Dispositive Power Not applicable
Person
With (8) Shared Dispositive Power 6,376 shares of
common stock
- -------------------------------------------------------------------
9 Aggregate Amount Beneficially Owned by Each
Reporting Person
6,376 shares of common stock
- -------------------------------------------------------------------
10 Check if the Aggregate Amount in Row (9) Excludes
Certain Shares (See Instructions) [ ]
- -------------------------------------------------------------------
11 Percent of Class Represented by Amount in Row 9
Less than 0.1%
- -------------------------------------------------------------------
12 Type of Reporting Person (See Instructions)
00-LLC
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Cusip No. 141408104 13G Page 4 of 18 Pages
1 Names of Reporting Persons
S.S. or I.R.S. Identification Nos. of Above Persons
Oak IV Affiliates Fund, Limited Partnership
06-1256163
- -------------------------------------------------------------------
2 Check the Appropriate Box if a Member of a Group (See Instructions)
(a) [ ]
(b) [ ]
- -------------------------------------------------------------------
3 SEC Use Only
- ------------------------------------------------------------------
4 Citizenship or Place of Organization
Delaware
- -------------------------------------------------------------------
Number of (5) Sole Voting Power 291 shares of common
Shares stock
Beneficially
Owned by (6) Shared Voting Power Not applicable
Each
Reporting (7) Sole Dispositive Power 291 shares of common
Person stock
With (8) Shared Dispositive Power Not applicable
- -------------------------------------------------------------------
9 Aggregate Amount Beneficially Owned by Each
Reporting Person
291 shares of common stock
- -------------------------------------------------------------------
10 Check if the Aggregate Amount in Row (9) Excludes
Certain Shares (See Instructions) [ ]
- -------------------------------------------------------------------
11 Percent of Class Represented by Amount in Row 9
Less than 0.1%
- -------------------------------------------------------------------
12 Type of Reporting Person (See Instructions)
PN
<PAGE>
Cusip No. 141408104 13G Page 5 of 18 Pages
1 Names of Reporting Persons
S.S. or I.R.S. Identification Nos. of Above Persons
Oak IV Affiliates
06-1256164
- -------------------------------------------------------------------
2 Check the Appropriate Box if a Member of a Group (See Instructions)
(a) [ ]
(b) [ ]
- -------------------------------------------------------------------
3 SEC Use Only
- ------------------------------------------------------------------
4 Citizenship or Place of Organization
Connecticut
- -------------------------------------------------------------------
Number of (5) Sole Voting Power Not applicable
Shares
Bene- (6) Shared Voting Power 291 shares of
ficially common stock
Owned by
Each (7) Sole Dispositive Power Not applicable
Reporting
Person (8) Shared Dispositive Power 291 shares of
With common stock
- -------------------------------------------------------------------
9 Aggregate Amount Beneficially Owned by Each
Reporting Person
291 shares of common stock
- -------------------------------------------------------------------
10 Check if the Aggregate Amount in Row (9) Excludes
Certain Shares (See Instructions) [ ]
- -------------------------------------------------------------------
11 Percent of Class Represented by Amount in Row 9
Less than 0.1%
- -------------------------------------------------------------------
12 Type of Reporting Person (See Instructions)
PN
<PAGE>
Cusip No. 141408104 13G Page 6 of 18 Pages
1 Names of Reporting Persons
S.S. or I.R.S. Identification Nos. of Above Persons
Oak Management Corporation
06-0990851
- -------------------------------------------------------------------
2 Check the Appropriate Box if a Member of a Group (See Instructions)
(a) [ ]
(b) [ ]
- -------------------------------------------------------------------
3 SEC Use Only
- ------------------------------------------------------------------
4 Citizenship or Place of Organization
Delaware
- -------------------------------------------------------------------
Number of (5) Sole Voting Power Not applicable
Shares
Bene- (6) Shared Voting Power 6,667 shares of
ficially common stock
Owned by
Each (7) Sole Dispositive Power Not applicable
Reporting
Person (8) Shared Dispositive Power 6,667 shares of
With common stock
- -------------------------------------------------------------------
9 Aggregate Amount Beneficially Owned by Each
Reporting Person
6,667 shares of common stock
- -------------------------------------------------------------------
10 Check if the Aggregate Amount in Row (9) Excludes
Certain Shares (See Instructions) [ ]
- -------------------------------------------------------------------
11 Percent of Class Represented by Amount in Row 9
Less than 0.1%
- -------------------------------------------------------------------
12 Type of Reporting Person (See Instructions)
CO
<PAGE>
Cusip No. 141408104 13G Page 7 of 18 Pages
1 Names of Reporting Persons
S.S. or I.R.S. Identification Nos. of Above Persons
Bandel L. Carano
- -------------------------------------------------------------------
2 Check the Appropriate Box if a Member of a Group (See Instructions)
(a) [ ]
(b) [ ]
- -------------------------------------------------------------------
3 SEC Use Only
- ------------------------------------------------------------------
4 Citizenship or Place of Organization
United States
- -------------------------------------------------------------------
Number of (5) Sole Voting Power Not applicable
Shares
Bene- (6) Shared Voting Power 6,667 shares of
ficially common stock
Owned by
Each (7) Sole Dispositive Power Not applicable
Reporting
Person (8) Shared Dispositive Power 6,667 shares of
With common stock
- -------------------------------------------------------------------
9 Aggregate Amount Beneficially Owned by Each
Reporting Person
6,667 shares of common stock
- -------------------------------------------------------------------
10 Check if the Aggregate Amount in Row (9) Excludes
Certain Shares (See Instructions) [ ]
- -------------------------------------------------------------------
11 Percent of Class Represented by Amount in Row 9
Less than 0.1%
- -------------------------------------------------------------------
12 Type of Reporting Person (See Instructions)
IN
<PAGE>
Cusip No. 141408104 13G Page 8 of 18 Pages
1 Names of Reporting Persons
S.S. or I.R.S. Identification Nos. of Above Persons
Gerald R. Gallagher
- -------------------------------------------------------------------
2 Check the Appropriate Box if a Member of a Group (See Instructions)
(a) [ ]
(b) [ ]
- -------------------------------------------------------------------
3 SEC Use Only
- ------------------------------------------------------------------
4 Citizenship or Place of Organization
United States
- -------------------------------------------------------------------
Number of (5) Sole Voting Power Not applicable
Shares
Bene- (6) Shared Voting Power 6,667 shares of
ficially common stock
Owned by
Each (7) Sole Dispositive Power Not applicable
Reporting
Person (8) Shared Dispositive Power 6,667 shares of
With common stock
- -------------------------------------------------------------------
9 Aggregate Amount Beneficially Owned by Each
Reporting Person
6,667 shares of common stock
- -------------------------------------------------------------------
10 Check if the Aggregate Amount in Row (9) Excludes
Certain Shares (See Instructions) [ ]
- -------------------------------------------------------------------
11 Percent of Class Represented by Amount in Row 9
Less than 0.1%
- -------------------------------------------------------------------
12 Type of Reporting Person (See Instructions)
IN
<PAGE>
Cusip No. 141408104 13G Page 9 of 18 Pages
1 Names of Reporting Persons
S.S. or I.R.S. Identification Nos. of Above Persons
Edward F. Glassmeyer
- -------------------------------------------------------------------
2 Check the Appropriate Box if a Member of a Group (See Instructions)
(a) [ ]
(b) [ ]
- -------------------------------------------------------------------
3 SEC Use Only
- ------------------------------------------------------------------
4 Citizenship or Place of Organization
United States
- -------------------------------------------------------------------
Number of (5) Sole Voting Power Not applicable
Shares
Bene- (6) Shared Voting Power 6,667 shares of
ficially common stock
Owned by
Each (7) Sole Dispositive Power Not applicable
Reporting
Person (8) Shared Dispositive Power 6,667 shares of
With common stock
- -------------------------------------------------------------------
9 Aggregate Amount Beneficially Owned by Each
Reporting Person
6,667 shares of common stock
- -------------------------------------------------------------------
10 Check if the Aggregate Amount in Row (9) Excludes
Certain Shares (See Instructions) [ ]
- -------------------------------------------------------------------
11 Percent of Class Represented by Amount in Row 9
Less than 0.1%
- -------------------------------------------------------------------
12 Type of Reporting Person (See Instructions)
IN
<PAGE>
Cusip No. 141408104 13G Page 10 of 18 Pages
1 Names of Reporting Persons
S.S. or I.R.S. Identification Nos. of Above Persons
Ann H. Lamont
- -------------------------------------------------------------------
2 Check the Appropriate Box if a Member of a Group (See Instructions)
(a) [ ]
(b) [ ]
- -------------------------------------------------------------------
3 SEC Use Only
- ------------------------------------------------------------------
4 Citizenship or Place of Organization
United States
- -------------------------------------------------------------------
Number of (5) Sole Voting Power Not applicable
Shares
Bene- (6) Shared Voting Power 6,667 shares of
ficially common stock
Owned by
Each (7) Sole Dispositive Power Not applicable
Reporting
Person (8) Shared Dispositive Power 6,667 shares of
With common stock
- -------------------------------------------------------------------
9 Aggregate Amount Beneficially Owned by Each
Reporting Person
6,667 shares of common stock
- -------------------------------------------------------------------
10 Check if the Aggregate Amount in Row (9) Excludes
Certain Shares (See Instructions) [ ]
- -------------------------------------------------------------------
11 Percent of Class Represented by Amount in Row 9
Less than 0.1%
- -------------------------------------------------------------------
12 Type of Reporting Person (See Instructions)
IN
<PAGE>
Cusip No. 141408104 13G Page 11 of 18 Pages
1 Names of Reporting Persons
S.S. or I.R.S. Identification Nos. of Above Persons
Eileen M. More
- -------------------------------------------------------------------
2 Check the Appropriate Box if a Member of a Group (See Instructions)
(a) [ ]
(b) [ ]
- -------------------------------------------------------------------
3 SEC Use Only
- ------------------------------------------------------------------
4 Citizenship or Place of Organization
United States
- -------------------------------------------------------------------
Number of (5) Sole Voting Power Not applicable
Shares
Bene- (6) Shared Voting Power 6,667 shares of
ficially common stock
Owned by
Each (7) Sole Dispositive Power Not applicable
Reporting
Person (8) Shared Dispositive Power 6,667 shares of
With common stock
- -------------------------------------------------------------------
9 Aggregate Amount Beneficially Owned by Each
Reporting Person
6,667 shares of common stock
- -------------------------------------------------------------------
10 Check if the Aggregate Amount in Row (9) Excludes
Certain Shares (See Instructions) [ ]
- -------------------------------------------------------------------
11 Percent of Class Represented by Amount in Row 9
Less than 0.1%
- -------------------------------------------------------------------
12 Type of Reporting Person (See Instructions)
IN
<PAGE>
Page 12 of 18 pages
Schedule 13G
Amendment No. 1
Common Stock, Par Value $.001
CUSIP No. 141408104
Item 1(a) Name of Issuer:
Cardiac Pathways Corporation
Item 1(b) Address of Issuer's Principal Executive Offices:
955 Benecia Avenue
Sunnyvale, CA 94086
Item 2(a) Name of Person filing:
Oak Investment Partners IV, Limited Partnership
Oak Associates IV, LLC
Oak IV Affiliates Fund, Limited Partnership
Oak IV Affiliates
Oak Management Corporation
Bandel L. Carano
Gerald R. Gallagher
Edward F. Glassmeyer
Ann H. Lamont
Eileen M. More
Item 2(b) Address of Principal Business Office or, if none, Residence:
c/o Oak Management Corporation
One Gorham Island
Westport, CT 06880
Item 2(c) Citizenship:
Please refer to Item 4 on each cover sheet for each filing person
Item 2(d) Title of Class of Securities:
Common stock, $.001 par value
Item 2(e) CUSIP Number: 141408104
Item 3 Not Applicable.
Item 4 Ownership.
The approximate percentages of shares of Common Stock reported as
beneficially owned by the Reporting Entities is based upon
<PAGE>
9,529,805 shares outstanding as of October 21, 1997, as reported in the Issuer's
Quarterly Report on Form 10-Q for the fiscal quarter ended September 30, 1997,
plus the shares issuable upon exercise of the warrants described in the
following sentence. Amounts shown as beneficially owned include currently
exercisable Warrants to purchase 6,376 shares of Common Stock and 291 shares of
Common Stock held by Oak Investment Partners IV, Limited Partnership, and Oak IV
Affiliates Fund, Limited Partnership, respectively.
Please see Items 5, 6, 7, 8, 9 and 11 for each cover sheet for each filing
entity.
Item 5 Ownership of Five Percent or Less of a Class.
If this statement is being filed to report the fact that as of the date
hereof the reporting person has ceased to be the beneficial owner of more than
five percent of the class of securities, check the following [X].
Item 6 Ownership of More than Five Percent on Behalf of Another Person.
Not applicable
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>
Signature
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 12, 1998
Oak Investment Partners IV
Limited Partnership
By: Oak Associates IV, LLC,
As General Partner
By: /s/ Edward F. Glassmeyer
-------------------------------
Managing Member
Oak Associates IV, LLC
By: /s/ Edward F. Glassmeyer
-------------------------------
Managing Member
Oak IV Affiliates Fund, Limited
Partnership
By: Oak IV Affiliates, As General Partner
By: /s/ Edward F. Glassmeyer
-------------------------------
General Partner
Oak IV Affiliates
By: /s/ Edward F. Glassmeyer
-------------------------------
General Partner
<PAGE>
OAK MANAGEMENT CORPORATION
By: /s/ Edward F. Glassmeyer
-------------------------------
Name:
Title:
/s/ Bandel L. Carano
-------------------------------
Bandel L. Carano
/s/ Gerald R. Gallagher
-------------------------------
Gerald R. Gallagher
/s/ Edward F. Glassmeyer
-------------------------------
Edward F. Glassmeyer
/s/ Ann H. Lamont
-------------------------------
Ann H. Lamont
/s/ Eileen M. More
-------------------------------
Eileen M. More
<PAGE>
INDEX TO EXHIBITS
Page
EXHIBIT A Agreement of Reporting Persons 17
<PAGE>
Exhibit A
Each of the undersigned hereby agrees that Amendment No. 1 to the Schedule
13G filed on the date hereof with respect to the shares of Common Stock of
Cardiac Pathways Corporation has been filed on behalf of the undersigned.
Signature:
Dated February 12, 1998
Oak Investment Partners IV
Limited Partnership
By: Oak Associates IV, LLC,
As General Partner
By: /s/ Edward F. Glassmeyer
-------------------------------
Managing Member
Oak Associates IV, LLC
By: /s/ Edward F. Glassmeyer
-------------------------------
Managing Member
Oak IV Affiliates Fund, Limited
Partnership
By: Oak IV Affiliates, As General Partner
By: /s/ Edward F. Glassmeyer
-------------------------------
General Partner
Oak IV Affiliates
By: /s/ Edward F. Glassmeyer
-------------------------------
General Partner
<PAGE>
OAK MANAGEMENT CORPORATION
By: /s/ Edward F. Glassmeyer
-------------------------------
Name: Edward F. Glassmeyer
Title: President
/s/ Bandel L. Carano
-------------------------------
Bandel L. Carano
/s/ Gerald R. Gallagher
-------------------------------
Gerald R. Gallagher
/s/ Edward F. Glassmeyer
-------------------------------
Edward F. Glassmeyer
/s/ Ann H. Lamont
-------------------------------
Ann H. Lamont
/s/ Eileen M. More
-------------------------------
Eileen M. More
