Ownership Submission
FORM 4
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940
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(Print or Type Responses)
1. Name and Address of Reporting Person *
Petrucci Gary M
  2. Issuer Name and Ticker or Trading Symbol
CARDIOVASCULAR SYSTEMS INC [NONE]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
__X__ Director _____ 10% Owner
_____ Officer (give title below) __X__ Other (specify below)
Mbr of 13(d) grp owng >10%
(Last)
(First)
(Middle)
651 CAMPUS DRIVE
3. Date of Earliest Transaction (Month/Day/Year)
02/25/2009
(Street)

ST. PAUL, MN 55112
4. If Amendment, Date Original Filed(Month/Day/Year)
6. Individual or Joint/Group Filing(Check Applicable Line)
_X_ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person
(City)
(State)
(Zip)
Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3)
2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code
(Instr. 8)
4. Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5)
5. Amount of Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 3 and 4)
6. Ownership Form: Direct (D) or Indirect (I)
(Instr. 4)
7. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V Amount (A) or (D) Price
Common Stock               323,325 D  
Common Stock               50,000 I By Partnership (1)

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 3)
2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year) 3A. Deemed Execution Date, if any (Month/Day/Year) 4. Transaction Code
(Instr. 8)
5. Number of Derivative Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4, and 5)
6. Date Exercisable and Expiration Date
(Month/Day/Year)
7. Title and Amount of Underlying Securities
(Instr. 3 and 4)
8. Price of Derivative Security
(Instr. 5)
9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 4)
10. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 4)
11. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares
Stock Option (right to buy) $ 6             12/01/2004 11/30/2009 Common Stock 20,000   20,000 D  
Stock Option (right to buy) $ 8             12/01/2005 11/30/2010 Common Stock 15,000   15,000 D  
Stock Option (right to buy) $ 5.71             12/19/2006 12/18/2016 Common Stock 30,000   30,000 D  
Stock Option (right to buy) $ 5.11             10/09/2007 10/08/2017 Common Stock 6,680   6,680 D  
Stock Option (right to buy) $ 7.36             11/13/2007 11/12/2017 Common Stock 38,320   38,320 D  
Stock Option (right to buy) $ 7.86             12/31/2007 12/30/2012 Common Stock 366,161   366,161 D  
Series A Conv Preferred Stock (2)               (2)   (2) Common Stock 36,314   36,314 D  
Warrant $ 6             11/16/2004 11/16/2009 Common Stock 20,000   20,000 D  
Warrant $ 5.71             07/19/2006 07/19/2011 Series A Conv Preferred Stock 5,157   5,157 D  
Warrant $ 5.71 02/25/2009   J(3)   13,810   02/25/2009 02/24/2014 Common Stock 13,810 $ 0 13,810 D  

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
Petrucci Gary M
651 CAMPUS DRIVE
ST. PAUL, MN 55112
  X     Mbr of 13(d) grp owng >10%

Signatures

 /s/ Carlye S. Landin as Attorney-in-Fact for Gary M. Petrucci pursuant to Power of Attorney previously filed.   02/25/2009
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1) Shares held by Applecrest Partners LTD Partnership, of which Mr. Petrucci is the General Partner.
(2) Each share of Series A convertible preferred stock is convertible at any time, at the holder's election, into 1.01 shares of common stock and has no expiration date.
(3) Holders of approximately 68% of the outstanding preferred stock entered into an agreement with the Company whereby effective immediately prior to the effective time of the merger of the Company with Replidyne, Inc., all preferred stock will convert into shares of common stock. The warrants were issued pro rata to each preferred shareholder, based on the percentage of preferred stock held, in consideration for entering into such conversion agreement.

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