-----BEGIN PRIVACY-ENHANCED MESSAGE----- Proc-Type: 2001,MIC-CLEAR Originator-Name: webmaster@www.sec.gov Originator-Key-Asymmetric: MFgwCgYEVQgBAQICAf8DSgAwRwJAW2sNKK9AVtBzYZmr6aGjlWyK3XmZv3dTINen TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB MIC-Info: RSA-MD5,RSA, Q2KePgVZhxBrFL3TP7wy4R8+Z6zRnDJD0VaPd2TCwCJx6JBD7kLhFGRm5Rr7LjR+ 7/uPa0CJhnJNnoDzLmq8nA== 0000921895-07-000659.txt : 20070328 0000921895-07-000659.hdr.sgml : 20070328 20070328171505 ACCESSION NUMBER: 0000921895-07-000659 CONFORMED SUBMISSION TYPE: SC 13G PUBLIC DOCUMENT COUNT: 1 FILED AS OF DATE: 20070328 DATE AS OF CHANGE: 20070328 SUBJECT COMPANY: COMPANY DATA: COMPANY CONFORMED NAME: ATS MEDICAL INC CENTRAL INDEX KEY: 0000824068 STANDARD INDUSTRIAL CLASSIFICATION: ORTHOPEDIC, PROSTHETIC & SURGICAL APPLIANCES & SUPPLIES [3842] IRS NUMBER: 411595629 STATE OF INCORPORATION: MN FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: SC 13G SEC ACT: 1934 Act SEC FILE NUMBER: 005-49437 FILM NUMBER: 07725004 BUSINESS ADDRESS: STREET 1: 3905 ANNAPOLIS LA STREET 2: SUITE 105 CITY: MINNEAPOLIS STATE: MN ZIP: 55447 BUSINESS PHONE: 6125537736 MAIL ADDRESS: STREET 1: 3905 ANNAPOLIS LANE STREET 2: SUITE 105 CITY: MINNEAPOLIS STATE: MN ZIP: 55447 FORMER COMPANY: FORMER CONFORMED NAME: ATS MEDCIAL INC DATE OF NAME CHANGE: 19920803 FILED BY: COMPANY DATA: COMPANY CONFORMED NAME: ACCIPITER CAPITAL MANAGEMENT, LLC CENTRAL INDEX KEY: 0001280190 IRS NUMBER: 134220800 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: SC 13G BUSINESS ADDRESS: STREET 1: 399 PARK AVENUE STREET 2: 38TH FLOOR CITY: NEW YORK STATE: NY ZIP: 10022 BUSINESS PHONE: 2127058700 MAIL ADDRESS: STREET 1: 399 PARK AVENUE STREET 2: 38TH FLOOR CITY: NEW YORK STATE: NY ZIP: 10022 FORMER COMPANY: FORMER CONFORMED NAME: ACCIPITER CAPITAL MANAGEMENT DATE OF NAME CHANGE: 20040213 SC 13G 1 sc13g06588ats_03192007.htm sec document 

                       SECURITIES AND EXCHANGE COMMISSION
                              WASHINGTON, DC 20549

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

                                  SCHEDULE 13G
                                 (Rule 13d-102)

             INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT
           TO RULES 13d-1(b) (c) AND (d) AND AMENDMENTS THERETO FILED
                            PURSUANT TO RULE 13d-2(b)

                              (Amendment No. )(1)

                                ATS Medical, Inc.
 -------------------------------------------------------------------------------
                                (Name of Issuer)

                     Common Stock, $0.01 Par Value Per Share
 -------------------------------------------------------------------------------
                         (Title of Class of Securities)

                                    002083103
 -------------------------------------------------------------------------------
                                 (CUSIP Number)

                                 March 19, 2007
 -------------------------------------------------------------------------------
             (Date of Event Which Requires Filing of this Statement)
                                 --------------

Check the  appropriate box to designate the rule pursuant to which this Schedule
is filed:

      / /  Rule 13d-1(b)

      /x/  Rule 13d-1(c)

      / /  Rule 13d-1(d)


- --------
      (1)  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 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).



- ----------------------                                    ----------------------
CUSIP No. 002083103                    13G                   Page 2 of 17 Pages
- ----------------------                                    ----------------------


================================================================================
     1         NAME OF REPORTING PERSONS
               I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

                    ACCIPITER LIFE SCIENCES FUND, LP
- --------------------------------------------------------------------------------
     2         CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*         (a) / /
                                                                         (b) / /
- --------------------------------------------------------------------------------
     3         SEC USE ONLY

- --------------------------------------------------------------------------------
     4         CITIZENSHIP OR PLACE OF ORGANIZATION

                    DELAWARE
- --------------------------------------------------------------------------------
 NUMBER OF         5     SOLE VOTING POWER
   SHARES
BENEFICIALLY                  1,172,094 shares
  OWNED BY     -----------------------------------------------------------------
    EACH           6     SHARED VOTING POWER
 REPORTING
PERSON WITH                   0 shares
               -----------------------------------------------------------------
                   7     SOLE DISPOSITIVE POWER

                              1,172,094 shares
               -----------------------------------------------------------------
                   8     SHARED DISPOSITIVE POWER

                              0 shares
- --------------------------------------------------------------------------------
     9         AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING
               PERSON

                    1,172,094 shares
- --------------------------------------------------------------------------------
    10         CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES
               CERTAIN SHARES*                                               / /
- --------------------------------------------------------------------------------
    11         PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

                    2.4%
- --------------------------------------------------------------------------------
    12         TYPE OF REPORTING PERSON*

                    PN
================================================================================

                      *SEE INSTRUCTIONS BEFORE FILLING OUT!



- ----------------------                                    ----------------------
CUSIP No. 002083103                    13G                   Page 3 of 17 Pages
- ----------------------                                    ----------------------


================================================================================
     1         NAME OF REPORTING PERSONS
               I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

                    ACCIPITER LIFE SCIENCES FUND (OFFSHORE), LTD.
- --------------------------------------------------------------------------------
     2         CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*         (a) / /
                                                                         (b) / /
- --------------------------------------------------------------------------------
     3         SEC USE ONLY

- --------------------------------------------------------------------------------
     4         CITIZENSHIP OR PLACE OF ORGANIZATION

                    CAYMAN ISLANDS
- --------------------------------------------------------------------------------
 NUMBER OF         5     SOLE VOTING POWER
   SHARES
BENEFICIALLY                  1,178,006 shares
  OWNED BY     -----------------------------------------------------------------
    EACH           6     SHARED VOTING POWER
 REPORTING
PERSON WITH                   0 shares
               -----------------------------------------------------------------
                   7     SOLE DISPOSITIVE POWER

                              1,178,006 shares
               -----------------------------------------------------------------
                   8     SHARED DISPOSITIVE POWER

                              0 shares
- --------------------------------------------------------------------------------
     9         AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING
               PERSON

                    1,178,006 shares
- --------------------------------------------------------------------------------
    10         CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES
               CERTAIN SHARES*                                               / /
- --------------------------------------------------------------------------------
    11         PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

                    2.4%
- --------------------------------------------------------------------------------
    12         TYPE OF REPORTING PERSON*

                    OO
================================================================================

                      *SEE INSTRUCTIONS BEFORE FILLING OUT!



- ----------------------                                    ----------------------
CUSIP No. 002083103                    13G                   Page 4 of 17 Pages
- ----------------------                                    ----------------------


================================================================================
     1         NAME OF REPORTING PERSONS
               I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

                    ACCIPITER LIFE SCIENCES FUND II, LP
- --------------------------------------------------------------------------------
     2         CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*         (a) / /
                                                                         (b) / /
- --------------------------------------------------------------------------------
     3         SEC USE ONLY

- --------------------------------------------------------------------------------
     4         CITIZENSHIP OR PLACE OF ORGANIZATION

                    DELAWARE
- --------------------------------------------------------------------------------
 NUMBER OF         5     SOLE VOTING POWER
   SHARES
BENEFICIALLY                  651,280 shares
  OWNED BY     -----------------------------------------------------------------
    EACH           6     SHARED VOTING POWER
 REPORTING
PERSON WITH                   0 shares
               -----------------------------------------------------------------
                   7     SOLE DISPOSITIVE POWER

                              651,280 shares
               -----------------------------------------------------------------
                   8     SHARED DISPOSITIVE POWER

                              0 shares
- --------------------------------------------------------------------------------
     9         AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING
               PERSON

                    651,280 shares
- --------------------------------------------------------------------------------
    10         CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES
               CERTAIN SHARES*                                               / /
- --------------------------------------------------------------------------------
    11         PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

                    1.3%
- --------------------------------------------------------------------------------
    12         TYPE OF REPORTING PERSON*

                    PN
================================================================================

                      *SEE INSTRUCTIONS BEFORE FILLING OUT!



- ----------------------                                    ----------------------
CUSIP No. 002083103                    13G                   Page 5 of 17 Pages
- ----------------------                                    ----------------------


================================================================================
     1         NAME OF REPORTING PERSONS
               I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

                    ACCIPITER LIFE SCIENCES FUND II (OFFSHORE), LTD.
- --------------------------------------------------------------------------------
     2         CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*         (a) / /
                                                                         (b) / /
- --------------------------------------------------------------------------------
     3         SEC USE ONLY

- --------------------------------------------------------------------------------
     4         CITIZENSHIP OR PLACE OF ORGANIZATION

                    CAYMAN ISLANDS
- --------------------------------------------------------------------------------
 NUMBER OF         5     SOLE VOTING POWER
   SHARES
BENEFICIALLY                  1,204,630 shares
  OWNED BY     -----------------------------------------------------------------
    EACH           6     SHARED VOTING POWER
 REPORTING
PERSON WITH                   0 shares
               -----------------------------------------------------------------
                   7     SOLE DISPOSITIVE POWER

                              1,204,630 shares
               -----------------------------------------------------------------
                   8     SHARED DISPOSITIVE POWER

                              0 shares
- --------------------------------------------------------------------------------
     9         AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING
               PERSON

                    1,204,630 shares
- --------------------------------------------------------------------------------
    10         CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES
               CERTAIN SHARES*                                               / /
- --------------------------------------------------------------------------------
    11         PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

                    2.5%
- --------------------------------------------------------------------------------
    12         TYPE OF REPORTING PERSON*

                    OO
================================================================================

                      *SEE INSTRUCTIONS BEFORE FILLING OUT!



- ----------------------                                    ----------------------
CUSIP No. 002083103                    13G                   Page 6 of 17 Pages
- ----------------------                                    ----------------------


================================================================================
     1         NAME OF REPORTING PERSONS
               I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

                    ACCIPITER LIFE SCIENCES FUND II (QP), LP
- --------------------------------------------------------------------------------
     2         CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*         (a) / /
                                                                         (b) / /
- --------------------------------------------------------------------------------
     3         SEC USE ONLY

- --------------------------------------------------------------------------------
     4         CITIZENSHIP OR PLACE OF ORGANIZATION

                    DELAWARE
- --------------------------------------------------------------------------------
 NUMBER OF         5     SOLE VOTING POWER
   SHARES
BENEFICIALLY                  680,990 shares
  OWNED BY     -----------------------------------------------------------------
    EACH           6     SHARED VOTING POWER
 REPORTING
PERSON WITH                   0 shares
               -----------------------------------------------------------------
                   7     SOLE DISPOSITIVE POWER

                              680,990 shares
               -----------------------------------------------------------------
                   8     SHARED DISPOSITIVE POWER

                              0 shares
- --------------------------------------------------------------------------------
     9         AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING
               PERSON

                    680,990 shares
- --------------------------------------------------------------------------------
    10         CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES
               CERTAIN SHARES*                                               / /
- --------------------------------------------------------------------------------
    11         PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

                    1.4%
- --------------------------------------------------------------------------------
    12         TYPE OF REPORTING PERSON*

                    PN
================================================================================

                      *SEE INSTRUCTIONS BEFORE FILLING OUT!



- ----------------------                                    ----------------------
CUSIP No. 002083103                    13G                   Page 7 of 17 Pages
- ----------------------                                    ----------------------


================================================================================
     1         NAME OF REPORTING PERSONS
               I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

                    CANDENS CAPITAL, LLC
- --------------------------------------------------------------------------------
     2         CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*         (a) / /
                                                                         (b) / /
- --------------------------------------------------------------------------------
     3         SEC USE ONLY

- --------------------------------------------------------------------------------
     4         CITIZENSHIP OR PLACE OF ORGANIZATION

                    DELAWARE
- --------------------------------------------------------------------------------
 NUMBER OF         5     SOLE VOTING POWER
   SHARES
BENEFICIALLY                  0 shares
  OWNED BY     -----------------------------------------------------------------
    EACH           6     SHARED VOTING POWER
 REPORTING
PERSON WITH                   2,504,364 shares
               -----------------------------------------------------------------
                   7     SOLE DISPOSITIVE POWER

                              0 shares
               -----------------------------------------------------------------
                   8     SHARED DISPOSITIVE POWER

                              2,504,364 shares
- --------------------------------------------------------------------------------
     9         AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING
               PERSON

                    2,504,364 shares
- --------------------------------------------------------------------------------
    10         CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES
               CERTAIN SHARES*                                               / /
- --------------------------------------------------------------------------------
    11         PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

                    5.1%
- --------------------------------------------------------------------------------
    12         TYPE OF REPORTING PERSON*

                    OO
================================================================================

                      *SEE INSTRUCTIONS BEFORE FILLING OUT!



- ----------------------                                    ----------------------
CUSIP No. 002083103                    13G                   Page 8 of 17 Pages
- ----------------------                                    ----------------------


================================================================================
     1         NAME OF REPORTING PERSONS
               I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

                    ACCIPITER CAPITAL MANAGEMENT, LLC
- --------------------------------------------------------------------------------
     2         CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*         (a) / /
                                                                         (b) / /
- --------------------------------------------------------------------------------
     3         SEC USE ONLY

- --------------------------------------------------------------------------------
     4         CITIZENSHIP OR PLACE OF ORGANIZATION

                    DELAWARE
- --------------------------------------------------------------------------------
 NUMBER OF         5     SOLE VOTING POWER
   SHARES
BENEFICIALLY                  0 shares
  OWNED BY     -----------------------------------------------------------------
    EACH           6     SHARED VOTING POWER
 REPORTING
PERSON WITH                   2,382,636 shares
               -----------------------------------------------------------------
                   7     SOLE DISPOSITIVE POWER

                              0 shares
               -----------------------------------------------------------------
                   8     SHARED DISPOSITIVE POWER

                              2,382,636 shares
- --------------------------------------------------------------------------------
     9         AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING
               PERSON

                    2,382,636 shares
- --------------------------------------------------------------------------------
    10         CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES
               CERTAIN SHARES*                                               / /
- --------------------------------------------------------------------------------
    11         PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

                    4.9%
- --------------------------------------------------------------------------------
    12         TYPE OF REPORTING PERSON*

                    OO
================================================================================

                      *SEE INSTRUCTIONS BEFORE FILLING OUT!



- ----------------------                                    ----------------------
CUSIP No. 002083103                    13G                   Page 9 of 17 Pages
- ----------------------                                    ----------------------


================================================================================
     1         NAME OF REPORTING PERSONS
               I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

                    GABE HOFFMAN
- --------------------------------------------------------------------------------
     2         CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*         (a) / /
                                                                         (b) / /
- --------------------------------------------------------------------------------
     3         SEC USE ONLY

- --------------------------------------------------------------------------------
     4         CITIZENSHIP OR PLACE OF ORGANIZATION

                    USA
- --------------------------------------------------------------------------------
 NUMBER OF         5     SOLE VOTING POWER
   SHARES
BENEFICIALLY                  0 shares
  OWNED BY     -----------------------------------------------------------------
    EACH           6     SHARED VOTING POWER
 REPORTING
PERSON WITH                   4,887,000 shares
               -----------------------------------------------------------------
                   7     SOLE DISPOSITIVE POWER

                              0 shares
               -----------------------------------------------------------------
                   8     SHARED DISPOSITIVE POWER

                              4,887,000 shares
- --------------------------------------------------------------------------------
     9         AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING
               PERSON

                    4,887,000 shares
- --------------------------------------------------------------------------------
    10         CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES
               CERTAIN SHARES*                                               / /
- --------------------------------------------------------------------------------
    11         PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

                    9.98%
- --------------------------------------------------------------------------------
    12         TYPE OF REPORTING PERSON*

                    IN
================================================================================

                      *SEE INSTRUCTIONS BEFORE FILLING OUT!



- ----------------------                                    ----------------------
CUSIP No. 002083103                    13G                   Page 10 of 17 Pages
- ----------------------                                    ----------------------


Item 1(a).  Name of Issuer:

            ATS Medical, Inc.

Item 1(b).  Address of Issuer's Principal Executive Offices:

            3905 Anapolis Lane North, Suite 105
            Minneapolis, MN 55447

Item 2(a).  Name of Person Filing:

            This statement is jointly filed by Accipiter Life Sciences Fund, LP,
            a Delaware  limited  partnership  ("ALSF"),  Accipiter Life Sciences
            Fund  (Offshore),  Ltd.,  a  Cayman  Islands  company  ("Offshore"),
            Accipiter Life Sciences Fund II, LP, a Delaware limited  partnership
            ("ALSF II"),  Accipiter  Life Sciences Fund II  (Offshore),  Ltd., a
            Cayman Islands Company ("Offshore II"), Accipiter Life Sciences Fund
            II (QP), LP, a Delaware  limited  partnership  ("QP II"),  Accipiter
            Capital  Management,  LLC,  a  Delaware  limited  liability  company
            ("Management"),  Candens Capital,  LLC, a Delaware limited liability
            company  ("Candens") and Gabe Hoffman  (together with ALSF, ALSF II,
            Offshore, Offshore II, QP II, Management and Candens, the "Reporting
            Person").  Because Gabe  Hoffman is the  managing  member of Candens
            (Gabe  Hoffman  and  Candens  are  hereinafter  referred  to as  the
            "Domestic  Controlling  Persons"),  which  in  turn  is the  general
            partner of ALSF,  ALSF II and QP II, and because Gabe Hoffman is the
            managing  member of  Management  (Gabe  Hoffman and  Management  are
            hereinafter referred to as the "Foreign Controlling Persons"), which
            in turn is the  investment  manager of Offshore and Offshore II, the
            Domestic  Controlling Persons and Foreign Controlling Persons may be
            deemed,  pursuant to Rule 13d-3 of the  Securities  Exchange  Act of
            1934,  as amended (the "Act"),  to be the  beneficial  owners of all
            shares of Common Stock held by ALSF, ALSF II, Offshore,  Offshore II
            and QP II. The Reporting Persons are filing this joint statement, as
            they may be considered a "group" under Section  13(d)(3) of the Act.
            However,  neither  the fact of this  filing nor  anything  contained
            herein shall be deemed to be an admission by the  Reporting  Persons
            that such a group exists.

Item 2(b).  Address of Principal Business Office or, if None, Residence:

            399 Park Avenue, 38th Floor
            New York, New York 10022

Item 2(c).  Citizenship:

            ALSF, ALSF II, QP II, Candens and Management are organized under the
            laws  of  the  State  of  Delaware.  Offshore  and  Offshore  II are
            organized  under the laws of the Cayman  Islands.  Gabe Hoffman is a
            citizen of the United States of America.

Item 2(d).  Title of Class of Securities:

            Common Stock



- ----------------------                                    ----------------------
CUSIP No. 002083103                    13G                   Page 11 of 17 Pages
- ----------------------                                    ----------------------


Item 2(e).  CUSIP Number:

            002083103

Item        3. If This Statement is Filed Pursuant to Rule 13d-1(b), or 13d-2(b)
            or (c), Check Whether the Person Filing is a:

            /X/   Not Applicable

      (a)   / /   Broker or dealer  registered  under Section 15 of the Exchange
                  Act.

      (b)   / /   Bank as defined in Section 3(a)(6) of the Exchange Act.

      (c)   / /   Insurance  company  as  defined  in  Section  3(a)(19)  of the
                  Exchange Act.

      (d)   / /   Investment   company   registered   under  Section  8  of  the
                  Investment Company Act.

      (e)   / /   An    investment    adviser    in    accordance    with   Rule
                  13d-1(b)(1)(ii)(E).

      (f)   / /   An employee  benefit plan or endowment fund in accordance with
                  Rule 13d-1(b)(1)(ii)(F).

      (g)   / /   A parent holding  company or control person in accordance with
                  Rule 13d-1(b)(1)(ii)(G).

      (h)   / /   A  savings  association  as  defined  in  Section  3(b) of the
                  Federal Deposit Insurance Act.

      (i)   / /   A church  plan  that is  excluded  from the  definition  of an
                  investment  company under Section  3(c)(14) of the  Investment
                  Company Act.

      (j)   / /   Group, in accordance with Rule 13d-1(b)(1)(ii)(J).

Item 4.     Ownership

            The percentages  reported herein are calculated  based on 48,957,221
            shares of Common  Stock  outstanding  on March 15,  2007,  which the
            Issuer  reported as  outstanding  as follows:  40,832,221  shares of
            Common  Stock  outstanding  as of March 2, 2007,  as reported by the
            Issuer in its Annual  Report on Form 10-K filed with the  Securities
            and Exchange  Commission  ("SEC") on March 16, 2007,  and  8,125,000
            shares of Common  Stock agreed to be issued in  connection  with the
            sale by the Issuer of 8,125,000  shares of Common Stock and Warrants
            to  purchase   3,250,000  shares  of  Common  Stock  pursuant  to  a
            Securities  Purchase  Agreement  entered  into on  March  15,  2007,
            between the Issuer and certain  institutional  investors,  including
            the Reporting Persons, as reported in the Issuer's Current Report on
            Form 8-K filed with the SEC on March 16, 2007.

            See Cover Pages Items 5-11.



- ----------------------                                    ----------------------
CUSIP No. 002083103                    13G                   Page 12 of 17 Pages
- ----------------------                                    ----------------------


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 [].

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 or Control Person.

            Not Applicable

Item 8.     Identification and Classification of Members of the Group.

            See Exhibit A.

Item 9.     Notice of Dissolution of Group.

            Not Applicable

Item 10.    Certifications.

            By signing  below I certify  that,  to the best of my knowledge  and
belief, the securities  referred to above were not acquired and are not held for
the purpose of or with the effect of changing or influencing  the control of the
issuer of the  securities  and were not acquired and are not held in  connection
with or as a participant in any transaction having that purpose or effect.



- ----------------------                                    ----------------------
CUSIP No. 002083103                    13G                   Page 13 of 17 Pages
- ----------------------                                    ----------------------


                                    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: March 27, 2007                    ACCIPITER LIFE SCIENCES FUND, LP

                                         By:  Candens Capital, LLC
                                              its general partner

                                         By:  /s/ Gabe Hoffman
                                              -----------------------------------
                                              Gabe Hoffman, Managing Member


                                         ACCIPITER LIFE SCIENCES FUND II, LP

                                         By:  Candens Capital, LLC
                                              its general partner

                                         By:  /s/ Gabe Hoffman
                                              -----------------------------------
                                              Gabe Hoffman, Managing Member


                                         ACCIPITER LIFE SCIENCES FUND
                                         (OFFSHORE), LTD.

                                         By:  Accipiter Capital Management, LLC
                                              its investment manager

                                         By:  /s/ Gabe Hoffman
                                              ----------------------------------
                                              Gabe Hoffman, Managing Member


                                         ACCIPITER LIFE SCIENCES FUND II
                                         (OFFSHORE), LTD.

                                         By:  Accipiter Capital Management, LLC
                                              its investment manager

                                         By:  /s/ Gabe Hoffman
                                              ----------------------------------
                                              Gabe Hoffman, Managing Member



- ----------------------                                    ----------------------
CUSIP No. 002083103                    13G                   Page 14 of 17 Pages
- ----------------------                                    ----------------------


                                         ACCIPITER LIFE SCIENCES FUND II (QP),
                                         LP

                                         By:  Candens Capital, LLC
                                              its general partner

                                         By:  /s/ Gabe Hoffman
                                              ----------------------------------
                                              Gabe Hoffman, Managing Member


                                         ACCIPITER CAPITAL MANAGEMENT, LLC

                                         By:  /s/ Gabe Hoffman
                                              ----------------------------------
                                              Gabe Hoffman, Managing Member


                                         CANDENS CAPITAL, LLC

                                         By:  /s/ Gabe Hoffman
                                              ----------------------------------
                                              Gabe Hoffman, Managing Member


                                         /s/ Gabe Hoffman
                                         ---------------------------------------
                                         GABE HOFFMAN



- ----------------------                                    ----------------------
CUSIP No. 002083103                    13G                   Page 15 of 17 Pages
- ----------------------                                    ----------------------


                                  EXHIBIT INDEX

      The following document is filed herewith:

          (a)     Joint Filing  Agreement  dated March 27, 2007 among  Accipiter
                  Life Sciences Fund,  LP,  Accipiter Life Sciences Fund II, LP,
                  Accipiter Life Sciences Fund (Offshore),  Ltd., Accipiter Life
                  Sciences Fund II  (Offshore),  Ltd.,  Accipiter  Life Sciences
                  Fund II (QP), LP, Accipiter Capital  Management,  LLC, Candens
                  Capital, LLC and Gabe Hoffman.



- ----------------------                                    ----------------------
CUSIP No. 002083103                    13G                   Page 16 of 17 Pages
- ----------------------                                    ----------------------


                                    EXHIBIT A

                             JOINT FILING AGREEMENT

      The  undersigned  hereby  agree that the  Statement  on Schedule 13G dated
March 27, 2007 with respect to the shares of Common Stock of ATS Medical,  Inc.,
and any further  amendments  thereto executed by each and any of the undersigned
shall  be  filed  on  behalf  of  each  of the  undersigned  pursuant  to and in
accordance with the provisions of Rule 13d-1(k)(1) under the Securities Exchange
Act of 1934, as amended.

Dated: March 27, 2007                    ACCIPITER LIFE SCIENCES FUND, LP

                                         By:  Candens Capital, LLC
                                              its general partner

                                         By:  /s/ Gabe Hoffman
                                              -----------------------------------
                                              Gabe Hoffman, Managing Member


                                         ACCIPITER LIFE SCIENCES FUND II, LP

                                         By:  Candens Capital, LLC
                                              its general partner

                                         By:  /s/ Gabe Hoffman
                                              -----------------------------------
                                              Gabe Hoffman, Managing Member


                                         ACCIPITER LIFE SCIENCES FUND
                                         (OFFSHORE), LTD.

                                         By:  Accipiter Capital Management, LLC
                                              its investment manager

                                         By:  /s/ Gabe Hoffman
                                              ----------------------------------
                                              Gabe Hoffman, Managing Member


                                         ACCIPITER LIFE SCIENCES FUND II
                                         (OFFSHORE), LTD.

                                         By:  Accipiter Capital Management, LLC
                                              its investment manager

                                         By:  /s/ Gabe Hoffman
                                              ----------------------------------
                                              Gabe Hoffman, Managing Member



- ----------------------                                    ----------------------
CUSIP No. 002083103                    13G                   Page 17 of 17 Pages
- ----------------------                                    ----------------------


                                         ACCIPITER LIFE SCIENCES FUND II (QP),
                                         LP

                                         By:  Candens Capital, LLC
                                              its general partner

                                         By:  /s/ Gabe Hoffman
                                              ----------------------------------
                                              Gabe Hoffman, Managing Member


                                         ACCIPITER CAPITAL MANAGEMENT, LLC

                                         By:  /s/ Gabe Hoffman
                                              ----------------------------------
                                              Gabe Hoffman, Managing Member


                                         CANDENS CAPITAL, LLC

                                         By:  /s/ Gabe Hoffman
                                              ----------------------------------
                                              Gabe Hoffman, Managing Member


                                         /s/ Gabe Hoffman
                                         ---------------------------------------
                                         GABE HOFFMAN
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