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<TITLE>S-8</TITLE>
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<DIV style="width: 100%; border-bottom: 2pt solid black; font-size: 1pt">&nbsp;</DIV>
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<DIV align="center" style="font-size: 14pt; margin-top: 12pt"><B>UNITED STATES<BR>
SECURITIES AND EXCHANGE COMMISSION</B>
</DIV>

<DIV align="center" style="font-size: 12pt"><B>Washington, D.C. 20549</B>
</DIV>

<DIV align="center" style="font-size: 12pt"><B><DIV align="center"><DIV style="font-size: 3pt; margin-top: 16pt; width: 26%; border-top: 1px solid #000000">&nbsp;</DIV></DIV></B>
</DIV>

<DIV align="center" style="font-size: 18pt; margin-top: 12pt"><B>FORM S-8</B>
</DIV>


<DIV align="center" style="font-size: 12pt; margin-top: 12pt"><B>REGISTRATION STATEMENT<BR>
Under the Securities Act of 1933</B>
</DIV>

<DIV align="center" style="font-size: 24pt; margin-top: 12pt"><B>CARDIOVASCULAR SYSTEMS, INC.</B>
</DIV>

<DIV align="center" style="font-size: 10pt">(Exact Name of Registrant as Specified in its Charter)</DIV>


<DIV align="center">
<TABLE style="font-size: 10pt" cellspacing="0" border="0" cellpadding="0" width="100%">
<!-- Begin Table Head -->
<TR valign="bottom">
    <TD width="47%">&nbsp;</TD>
    <TD width="5%">&nbsp;</TD>
    <TD width="47%">&nbsp;</TD>
</TR>
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<TR valign="bottom">
    <TD align="center" valign="top">Delaware
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">84-1568247</TD>
</TR>
<TR style="font-size: 1px">
    <TD align="center" valign="top" style="border-top: 1px solid #000000">&nbsp;
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top" style="border-top: 1px solid #000000">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD align="center" valign="top">(State or Other Juris-<BR>
diction of Incorporation <BR>
or Organization)
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">(I.R.S. Employer<BR>
Identification Number)</TD>
</TR>
<!-- End Table Body -->
</TABLE>
</DIV>

<DIV align="center" style="font-size: 10pt; margin-top: 12pt"><B>651 Campus Drive<BR>
St. Paul, Minnesota 55112-3495</B><BR>
(Address of Principal Executive Office and Zip Code)</DIV>

<DIV align="center" style="font-size: 10pt; margin-top: 12pt"><B>Cardiovascular Systems, Inc. Amended and Restated 2007 Equity Incentive Plan<BR>
and<BR>
Stock Options Granted Under the 2003 Stock Option Plan<BR>
of Cardiovascular Systems, Inc., a Minnesota Corporation</B><BR>
(Full Title of the Plan)</DIV>

<DIV align="center" style="font-size: 10pt; margin-top: 12pt">Laurence L. Betterley<BR>
Chief Financial Officer<BR>
Cardiovascular Systems, Inc.<BR>
651 Campus Drive<BR>
St. Paul, Minnesota 55112-3495<BR>
(651)&nbsp;259-1600<BR>
(Name, Address and Telephone Number, Including Area Code, of Agent for Service)</DIV>

<DIV align="center" style="font-size: 10pt; margin-top: 12pt"><I>Copies to:</I><BR>
Robert K. Ranum, Esq.<BR>
Fredrikson &#038; Byron, P.A.<BR>
200 South Sixth Street, Suite&nbsp;4000<BR>
Minneapolis, MN 55402<BR>
Fax: (612)&nbsp;492-7077</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt">Indicate
by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company. See the definitions of &#147;large accelerated filer,&#148; &#147;accelerated filer&#148; and &#147;smaller reporting company&#148; in Rule 12b-2 of the Exchange Act. (Check one):</DIV>

<TABLE width="100%" style="font-size: 10pt; margin-top: 0pt"><TR><TD>Large accelerated filer&nbsp;<FONT face="Wingdings">&#111;</FONT></TD><TD align="center">Accelerated filer&nbsp;<FONT face="Wingdings">&#111;</FONT>&nbsp;</TD><TD align="center">Non-accelerated filer&nbsp;<FONT face="Wingdings">&#111;</FONT><BR>(Do not check if a smaller reporting company)</TD><TD align="right">Smaller reporting company&nbsp;<FONT face="Wingdings">&#254;</FONT></TD></TR></TABLE>

<DIV align="center" style="font-size: 10pt; margin-top: 18pt">CALCULATION OF REGISTRATION FEE
</DIV>

<DIV align="center">
<TABLE style="font-size: 10pt" cellspacing="0" border="0" cellpadding="0" width="100%">
<!-- Begin Table Head -->
<TR valign="bottom" style="font-size: 1pt">
    <TD width="1%">&nbsp;</TD>
    <TD width="54%">&nbsp;</TD>
    <TD width="2%">&nbsp;</TD><!-- VRule -->
    <TD width="2%">&nbsp;</TD>
    <TD width="3%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="3%">&nbsp;</TD>
    <TD width="2%">&nbsp;</TD><!-- VRule -->
    <TD width="2%">&nbsp;</TD>
    <TD width="3%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="3%">&nbsp;</TD>
    <TD width="2%">&nbsp;</TD><!-- VRule -->
    <TD width="2%">&nbsp;</TD>
    <TD width="3%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="3%">&nbsp;</TD>
    <TD width="2%">&nbsp;</TD><!-- VRule -->
    <TD width="2%">&nbsp;</TD>
    <TD width="3%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="3%">&nbsp;</TD>

    <TD width="1%">&nbsp;</TD>
</TR><TR style="font-size: 1px" valign="bottom">
    <TD nowrap align="left" colspan="23" style="border-bottom: 3px double #000000">&nbsp;</TD>
</TR>
<TR style="font-size: 8pt" valign="bottom">    <TD width="1%">&nbsp;</TD>

    <TD>&nbsp;</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3"><B>Proposed</B></TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
</TR>
<TR style="font-size: 8pt" valign="bottom">    <TD width="1%">&nbsp;</TD>

    <TD>&nbsp;</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3"><B>Proposed Maximum</B></TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3"><B>Maximum</B></TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
</TR>
<TR style="font-size: 8pt" valign="bottom">    <TD width="1%">&nbsp;</TD>

    <TD nowrap align="center"><B>Title of Securities</B></TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3"><B>Amount to be</B></TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3"><B>Offering Price</B></TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3"><B>Aggregate</B></TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3"><B>Amount of</B></TD>
    <TD width="1%">&nbsp;</TD>
</TR>
<TR style="font-size: 8pt" valign="bottom">    <TD width="1%">&nbsp;</TD>

    <TD nowrap align="center"><B>to be Registered</B></TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3"><B>Registered(1)</B></TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3"><B>Per Share(2)</B></TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3"><B>Offering Price(2)</B></TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3"><B>Registration Fee</B></TD>
    <TD width="1%">&nbsp;</TD>
</TR>

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<TR valign="bottom">
    <TD width="1%" style="border-top: 2px solid #000000">&nbsp;</TD>
                    <TD style="border-top: 2px solid #000000"><DIV style="margin-left:15px; text-indent:-15px">Awards to purchase
Common Stock under
the Amended and
Restated 2007
Equity Incentive
Plan</DIV></TD>
    <TD style="border-right: 2px solid #000000; border-top: 2px solid #000000">&nbsp;</TD>
    <TD style="border-top: 2px solid #000000">&nbsp;</TD>
    <TD colspan="3" align="center" style="border-top: 2px solid #000000">Indefinite</TD>
    <TD style="border-right: 2px solid #000000; border-top: 2px solid #000000">&nbsp;</TD>
    <TD style="border-top: 2px solid #000000">&nbsp;</TD>
    <TD align="right" style="border-top: 2px solid #000000">$</TD>
    <TD align="right" style="border-top: 2px solid #000000">0.00</TD>
    <TD style="border-top: 2px solid #000000">&nbsp;</TD>
    <TD style="border-right: 2px solid #000000; border-top: 2px solid #000000">&nbsp;</TD>
    <TD style="border-top: 2px solid #000000">&nbsp;</TD>
    <TD align="right" style="border-top: 2px solid #000000">$</TD>
    <TD align="right" style="border-top: 2px solid #000000">0.00</TD>
    <TD style="border-top: 2px solid #000000">&nbsp;</TD>
    <TD style="border-right: 2px solid #000000; border-top: 2px solid #000000">&nbsp;</TD>
    <TD style="border-top: 2px solid #000000">&nbsp;</TD>
    <TD align="right" style="border-top: 2px solid #000000">$</TD>
    <TD align="right" style="border-top: 2px solid #000000">0.00</TD>
    <TD style="border-top: 2px solid #000000">&nbsp;</TD>
    <TD width="1%" style="border-top: 2px solid #000000">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD width="1%" style="border-top: 2px solid #000000">&nbsp;</TD>
    <TD style="border-top: 2px solid #000000"><DIV style="margin-left:15px; text-indent:-15px">Common Stock awards
and issuable upon
exercise of awards
granted under the
Amended and
Restated 2007
Equity Incentive
Plan</DIV></TD>
    <TD style="border-right: 2px solid #000000; border-top: 2px solid #000000">&nbsp;</TD>
    <TD style="border-top: 2px solid #000000">&nbsp;</TD>
    <TD style="border-top: 2px solid #000000">&nbsp;</TD>
    <TD align="right" style="border-top: 2px solid #000000">2,509,969</TD>
    <TD style="border-top: 2px solid #000000">&nbsp;</TD>
    <TD style="border-right: 2px solid #000000; border-top: 2px solid #000000">&nbsp;</TD>
    <TD style="border-top: 2px solid #000000">&nbsp;</TD>
    <TD style="border-top: 2px solid #000000">&nbsp;</TD>
    <TD align="right" style="border-top: 2px solid #000000">$6.86</TD>
    <TD style="border-top: 2px solid #000000">&nbsp;</TD>
    <TD style="border-right: 2px solid #000000; border-top: 2px solid #000000">&nbsp;</TD>
    <TD style="border-top: 2px solid #000000">&nbsp;</TD>
    <TD style="border-top: 2px solid #000000">&nbsp;</TD>
    <TD align="right" style="border-top: 2px solid #000000">$17,218,387.34</TD>
    <TD style="border-top: 2px solid #000000">&nbsp;</TD>
    <TD style="border-right: 2px solid #000000; border-top: 2px solid #000000">&nbsp;</TD>
    <TD style="border-top: 2px solid #000000">&nbsp;</TD>
    <TD style="border-top: 2px solid #000000">&nbsp;</TD>
    <TD align="right" style="border-top: 2px solid #000000">$960.79</TD>
    <TD style="border-top: 2px solid #000000">&nbsp;</TD>
    <TD width="1%" style="border-top: 2px solid #000000">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD width="1%" style="border-top: 2px solid #000000">&nbsp;</TD>
    <TD style="border-top: 2px solid #000000"><DIV style="margin-left:15px; text-indent:-15px">Common Stock
issuable upon
exercise of options
assumed by
Registrant (3)</DIV></TD>
    <TD style="border-right: 2px solid #000000; border-top: 2px solid #000000">&nbsp;</TD>
    <TD style="border-top: 2px solid #000000">&nbsp;</TD>
    <TD style="border-top: 2px solid #000000">&nbsp;</TD>
    <TD align="right" style="border-top: 2px solid #000000">2,102,828</TD>
    <TD style="border-top: 2px solid #000000">&nbsp;</TD>
    <TD style="border-right: 2px solid #000000; border-top: 2px solid #000000">&nbsp;</TD>
    <TD style="border-top: 2px solid #000000">&nbsp;</TD>
    <TD style="border-top: 2px solid #000000">&nbsp;</TD>
    <TD align="right" style="border-top: 2px solid #000000">$6.86</TD>
    <TD style="border-top: 2px solid #000000">&nbsp;</TD>
    <TD style="border-right: 2px solid #000000; border-top: 2px solid #000000">&nbsp;</TD>
    <TD style="border-top: 2px solid #000000">&nbsp;</TD>
    <TD style="border-top: 2px solid #000000">&nbsp;</TD>
    <TD align="right" style="border-top: 2px solid #000000">$14,425,400.08</TD>
    <TD style="border-top: 2px solid #000000">&nbsp;</TD>
    <TD style="border-right: 2px solid #000000; border-top: 2px solid #000000">&nbsp;</TD>
    <TD style="border-top: 2px solid #000000">&nbsp;</TD>
    <TD style="border-top: 2px solid #000000">&nbsp;</TD>
    <TD align="right" style="border-top: 2px solid #000000">$804.94</TD>
    <TD style="border-top: 2px solid #000000">&nbsp;</TD>
    <TD width="1%" style="border-top: 2px solid #000000">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD width="1%" style="border-top: 2px solid #000000">&nbsp;</TD>
    <TD style="border-top: 2px solid #000000"><DIV style="margin-left:30px; text-indent:-15px">TOTAL:</DIV></TD>
    <TD style="border-right: 2px solid #000000; border-top: 2px solid #000000">&nbsp;</TD>
    <TD style="border-top: 2px solid #000000">&nbsp;</TD>
    <TD style="border-top: 2px solid #000000">&nbsp;</TD>
    <TD style="border-top: 2px solid #000000">&nbsp;</TD>
    <TD style="border-top: 2px solid #000000">&nbsp;</TD>
    <TD style="border-right: 2px solid #000000; border-top: 2px solid #000000">&nbsp;</TD>
    <TD style="border-top: 2px solid #000000">&nbsp;</TD>
    <TD style="border-top: 2px solid #000000">&nbsp;</TD>
    <TD style="border-top: 2px solid #000000">&nbsp;</TD>
    <TD style="border-top: 2px solid #000000">&nbsp;</TD>
    <TD style="border-right: 2px solid #000000; border-top: 2px solid #000000">&nbsp;</TD>
    <TD style="border-top: 2px solid #000000">&nbsp;</TD>
    <TD style="border-top: 2px solid #000000">&nbsp;</TD>
    <TD style="border-top: 2px solid #000000">&nbsp;</TD>
    <TD style="border-top: 2px solid #000000">&nbsp;</TD>
    <TD style="border-right: 2px solid #000000; border-top: 2px solid #000000">&nbsp;</TD>
    <TD style="border-top: 2px solid #000000">&nbsp;</TD>
    <TD style="border-top: 2px solid #000000">&nbsp;</TD>
    <TD align="right" style="border-top: 2px solid #000000">$1,765.73</TD>
    <TD style="border-top: 2px solid #000000">&nbsp;</TD>
    <TD width="1%" style="border-top: 2px solid #000000">&nbsp;</TD>
</TR>
<TR style="font-size: 1px" valign="bottom">
    <TD nowrap align="left" colspan="23" style="border-top: 3px double #000000">&nbsp;</TD>
</TR>

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</TABLE>
</DIV>


<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">
<TR>
    <TD width="3%"></TD>
    <TD width="1%"></TD>
    <TD width="96"></TD>
</TR>

<TR valign="top">
    <TD nowrap align="left">(1)</TD>
    <TD>&nbsp;</TD>
    <TD>In addition, pursuant to Rule&nbsp;416 under the Securities Act of 1933, there is also being
registered hereunder an indeterminate number of shares of interests to be offered or sold
pursuant to the employee benefit plan described herein and any additional securities which may
become issuable pursuant to antidilution provisions of the plan.</TD>
</TR>

<TR style="font-size: 3pt"><TD>&nbsp;</TD></TR>

<TR valign="top">
    <TD nowrap align="left">(2)</TD>
    <TD>&nbsp;</TD>
    <TD>Estimated pursuant to Rule 457(h) solely for the purpose of calculating the registration fee
and based upon the average of the high and low prices of the Registrant&#146;s Common Stock on
April 23, 2009.</TD>
</TR>

<TR style="font-size: 3pt"><TD>&nbsp;</TD></TR>

<TR valign="top">
    <TD nowrap align="left">(3)</TD>
    <TD>&nbsp;</TD>
    <TD>In connection with the closing of the merger on February&nbsp;25, 2009 contemplated by that
certain Agreement and Plan of Merger and Reorganization (the &#147;Merger Agreement&#148;) among the
Registrant (formerly known as Replidyne, Inc.), Responder Merger Sub, Inc. and Cardiovascular
Systems, Inc., a Minnesota corporation (&#147;CSI-Minnesota&#148;), dated as of November&nbsp;3, 2008, the
Registrant assumed all outstanding stock options under CSI-Minnesota&#146;s 2003 Stock Option Plan,
which became exercisable for shares of the Registrant&#146;s Common Stock, as adjusted in
accordance with the conversion ratio under the Merger Agreement. This registration statement
registers the shares of the Registrant&#146;s Common Stock underlying outstanding stock options
held by the Issuer&#146;s current employees that were issued prior to the merger pursuant to
CSI-Minnesota&#146;s 2003 Stock Option Plan.</TD>
</TR>

</TABLE>



<DIV style="width: 100%; border-bottom: 1pt solid black; margin-top: 10pt; font-size: 1pt">&nbsp;</DIV>
<DIV style="width: 100%; border-bottom: 2pt solid black; font-size: 1pt">&nbsp;</DIV>





<P align="center" style="font-size: 10pt"><!-- Folio -->&nbsp;<!-- /Folio -->
</DIV>

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<H5 align="left" style="page-break-before:always">&nbsp;</H5><P>

<DIV style="font-family: 'Times New Roman',Times,serif">








<DIV align="center" style="font-size: 10pt; margin-top: 18pt"><B>PART I</B>
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;As permitted by the rules of the Securities and Exchange Commission, this registration
statement omits the information specified in Part&nbsp;I of Form S-8. The documents containing the
information specified in Part&nbsp;I of this registration statement will be sent or given to eligible
employees as specified in Rule&nbsp;428(b)(1) promulgated under the Securities Act of 1933, as amended
(the &#147;Securities Act&#148;). Such documents are not being filed with the Commission either as part of
this registration statement or as prospectuses or prospectus supplements pursuant to Rule&nbsp;424
promulgated under the Securities Act. These documents and the documents incorporated by reference
in the registration statement pursuant to Item&nbsp;3 of Part&nbsp;II of this form, taken together,
constitute a prospectus that meets the requirements of Section 10(a) of the Securities Act.
</DIV>


<DIV align="center" style="font-size: 10pt; margin-top: 18pt"><B>PART II<BR>
INFORMATION REQUIRED IN THE REGISTRATION STATEMENT</B>
</DIV>


<DIV align="left" style="margin-top: 12pt">
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt; background: transparent; color: #000000">
<TR>
    <TD width="3%"></TD>
    <TD width="1%"></TD>
    <TD></TD>
</TR>
<TR valign="top">
    <TD nowrap align="left"><B>Item&nbsp;3.</B></TD>
    <TD>&nbsp;</TD>
    <TD><B>Incorporation of Documents by Reference.</B></TD>
</TR>
</TABLE>
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The following documents, previously filed with the Securities and Exchange Commission (the
&#147;Commission&#148;), are hereby incorporated by reference herein:
</DIV>


<DIV style="margin-top: 6pt">
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">

<TR valign="top" style="font-size: 10pt; color: #000000; background: transparent">
    <TD width="2%" style="background: transparent">&nbsp;</TD>
    <TD width="3%" nowrap align="left">1.</TD>
    <TD width="1%">&nbsp;</TD>
    <TD>Annual Report on Form 10-K for the year ended December&nbsp;31, 2008 filed with the
Commission by the Registrant (formerly known as Replidyne, Inc.) on February&nbsp;24, 2009;</TD>
</TR>

<TR>
    <TD style="font-size: 6pt">&nbsp;</TD>
</TR><TR valign="top" style="font-size: 10pt; color: #000000; background: transparent">
    <TD width="2%" style="background: transparent">&nbsp;</TD>
    <TD width="3%" nowrap align="left">2.</TD>
    <TD width="1%">&nbsp;</TD>
    <TD>Current Reports on Form 8-K filed with the Commission by the Registrant on March&nbsp;3,
2009,  March&nbsp;18, 2009, and April 17, 2009; and</TD>
</TR>

<TR>
    <TD style="font-size: 6pt">&nbsp;</TD>
</TR><TR valign="top" style="font-size: 10pt; color: #000000; background: transparent">
    <TD width="2%" style="background: transparent">&nbsp;</TD>
    <TD width="3%" nowrap align="left">3.</TD>
    <TD width="1%">&nbsp;</TD>
    <TD>The description of the Registrant&#146;s common stock set forth in the registration
statement on Form 8-A filed with the Commission on June&nbsp;26, 2006, including any amendments
or reports filed for the purpose of updating such information.</TD>
</TR>

</TABLE>
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;All documents subsequently filed by the Registrant pursuant to Sections&nbsp;13(a), 13(c), 14 and
15(d) of the Securities Exchange Act of 1934, prior to the filing of a post-effective amendment
which indicates that all securities offered have been sold or which deregisters all such securities
then remaining unsold, shall be deemed to be incorporated by reference in this Registration
Statement and to be a part hereof from the date of filing of such documents.
</DIV>


<DIV align="left" style="margin-top: 12pt">
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt; background: transparent; color: #000000">
<TR>
    <TD width="3%"></TD>
    <TD width="1%"></TD>
    <TD></TD>
</TR>
<TR valign="top">
    <TD nowrap align="left"><B>Item&nbsp;4.</B></TD>
    <TD>&nbsp;</TD>
    <TD><B>Description of Securities.</B></TD>
</TR>
</TABLE>
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt; margin-left: 6%">Not applicable.
</DIV>

<DIV align="left" style="margin-top: 12pt">
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt; background: transparent; color: #000000">
<TR>
    <TD width="3%"></TD>
    <TD width="1%"></TD>
    <TD></TD>
</TR>
<TR valign="top">
    <TD nowrap align="left"><B>Item&nbsp;5.</B></TD>
    <TD>&nbsp;</TD>
    <TD><B>Interests of Named Experts and Counsel.</B></TD>
</TR>
</TABLE>
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt; margin-left: 6%">Not applicable.
</DIV>

<DIV align="left" style="margin-top: 12pt">
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt; background: transparent; color: #000000">
<TR>
    <TD width="3%"></TD>
    <TD width="1%"></TD>
    <TD></TD>
</TR>
<TR valign="top">
    <TD nowrap align="left"><B>Item&nbsp;6.</B></TD>
    <TD>&nbsp;</TD>
    <TD><B>Indemnification of Directors and Officers.</B></TD>
</TR>
</TABLE>
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Under provisions of the Registrant&#146;s Bylaws, each person who is or was a director or officer
of the Company shall be indemnified by the Company to the full extent not prohibited by the General
Corporation Law of Delaware against any liability, cost or expense asserted against such director
or officer and incurred by such director or officer in any such person&#146;s capacity as director or
officer, or arising out of any such person&#146;s status as a director or officer. Additionally, the
Registrant has entered into indemnity agreements with each of its directors and officers pursuant
to which the Registrant has agreed to indemnify those individuals for liabilities incurred by them
as a result of their service as an officer or director to the fullest extent permitted by the
Delaware General Corporation Law as such law may from time to time be amended. The Registrant has
also purchased liability insurance policies covering its directors and officers to provide
protection where the Registrant cannot indemnify a director or officer.
</DIV>


<DIV align="left" style="margin-top: 12pt">
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt; background: transparent; color: #000000">
<TR>
    <TD width="3%"></TD>
    <TD width="1%"></TD>
    <TD></TD>
</TR>
<TR valign="top">
    <TD nowrap align="left"><B>Item&nbsp;7.</B></TD>
    <TD>&nbsp;</TD>
    <TD><B>Exemption from Registration Claimed.</B></TD>
</TR>
</TABLE>
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt; margin-left: 6%">Not applicable.
</DIV>

<P align="center" style="font-size: 10pt"><!-- Folio -->-1-<!-- /Folio -->
</DIV>

<!-- PAGEBREAK -->
<P><HR noshade><P>
<H5 align="left" style="page-break-before:always">&nbsp;</H5><P>

<DIV style="font-family: 'Times New Roman',Times,serif">

<DIV align="left" style="margin-top: 12pt">
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt; background: transparent; color: #000000">
<TR>
    <TD width="3%"></TD>
    <TD width="1%"></TD>
    <TD></TD>
</TR>
<TR valign="top">
    <TD nowrap align="left"><B>Item&nbsp;8.</B></TD>
    <TD>&nbsp;</TD>
    <TD><B>Exhibits.</B></TD>
</TR>
</TABLE>
</DIV>
<DIV align="center">
<TABLE style="font-size: 10pt" cellspacing="0" border="0" cellpadding="0" width="100%">
<!-- Begin Table Head -->
<TR valign="bottom">
    <TD width="5%">&nbsp;</TD>
    <TD width="3%">&nbsp;</TD>
    <TD width="92%">&nbsp;</TD>
</TR>
<!-- End Table Head -->
<!-- Begin Table Body -->
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">5.1
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Opinion of Fredrikson &#038; Byron, P.A.</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">23.1
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Consent of PricewaterhouseCoopers LLP</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">23.2
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Consent of KPMG LLP</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">23.3
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Consent of Fredrikson &#038; Byron, P.A. (included in Exhibit&nbsp;5.1)</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">24.1
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Power of Attorney (included on signature page hereof)</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">99.1
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Amended and Restated 2007 Equity Incentive Plan</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">99.2*
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Form of Incentive Stock Option Agreement under the 2003 Stock
Option Plan of Cardiovascular Systems, Inc., a Minnesota corporation</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">99.3*
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Form of Nonqualified Stock Option Agreement under the 2003
Stock Option Plan of Cardiovascular Systems, Inc., a Minnesota corporation</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">99.4*
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">2003 Stock Option Plan of Cardiovascular Systems, Inc., a
Minnesota corporation</TD>
</TR>
<!-- End Table Body -->
</TABLE>
</DIV>



<DIV align="left">
<DIV style="font-size: 3pt; margin-top: 16pt; width: 18%; border-top: 1px solid #000000">&nbsp;</DIV>
</DIV>

<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">
<TR>
    <TD width="3%"></TD>
    <TD width="1%"></TD>
    <TD width="96"></TD>
</TR>

<TR valign="top">
    <TD nowrap align="left">*</TD>
    <TD>&nbsp;</TD>
    <TD>Incorporated herein by reference to the Registration Statement on Form S-1
filed by CSI Minnesota, Inc. (formerly known as &#147;Cardiovascular Systems, Inc.&#148;) (File
No.&nbsp;333-148798) on January&nbsp;22, 2008.</TD>
</TR>

</TABLE>



<DIV align="left" style="margin-top: 12pt">
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt; background: transparent; color: #000000">
<TR>
    <TD width="3%"></TD>
    <TD width="1%"></TD>
    <TD></TD>
</TR>
<TR valign="top">
    <TD nowrap align="left"><B>Item&nbsp;9.</B></TD>
    <TD>&nbsp;</TD>
    <TD><B>Undertakings.</B></TD>
</TR>
</TABLE>
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt; margin-left: 6%">(a)&nbsp;The undersigned Registrant hereby undertakes:
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt; margin-left: 8%">(1)&nbsp;To file, during any period in which offers or sales are being made, a
post-effective amendment to this Registration Statement:
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt; margin-left: 10%">(i)&nbsp;To include any prospectus required by Section&nbsp;10(a)(3) of the
Securities Act of 1933;
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt; margin-left: 10%">(ii)&nbsp;To reflect in the prospectus any facts or events arising after
the effective date of the Registration Statement (or the most recent
post-effective amendment thereof) which, individually or in the
aggregate, represent a fundamental change in the information set
forth in the Registration Statement;
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt; margin-left: 10%">(iii)&nbsp;To include any material information with respect to the plan of
distribution not previously disclosed in the Registration Statement
or any material change to such information in the Registration
Statement;
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt; margin-left: 10%">Provided, however, that paragraphs (a)(1)(i) and (a)(1)(ii) of this
section do not apply if the information required to be included in a
post-effective amendment by those paragraphs is contained in periodic
reports filed by the Registrant pursuant to Section&nbsp;13 or Section
15(d) of the Securities Exchange Act of 1934 that are incorporated by
reference in the Registration Statement.
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt; margin-left: 8%">(2)&nbsp;That, for the purpose of determining any liability under the Securities
Act of 1933, each such post-effective amendment shall be deemed to be a new
Registration Statement relating to the securities offered therein, and the
offering of such securities at that time shall be deemed to be the initial
bona fide offering thereof.
</DIV>

<P align="center" style="font-size: 10pt"><!-- Folio -->-2-<!-- /Folio -->
</DIV>

<!-- PAGEBREAK -->
<P><HR noshade><P>
<H5 align="left" style="page-break-before:always">&nbsp;</H5><P>

<DIV style="font-family: 'Times New Roman',Times,serif">


<DIV align="left" style="font-size: 10pt; margin-top: 6pt; margin-left: 8%">(3)&nbsp;To remove from registration by means of a post-effective amendment any
of the securities being registered which remain unsold at the termination of
the offering.
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt; margin-left: 6%">(b)&nbsp;The undersigned Registrant hereby undertakes that, for purposes of determining
any liability under the Securities Act of 1933, each filing of the Registrant&#146;s
annual report pursuant to Section 13(a) or Section 15(d) of the Securities Exchange
Act of 1934 (and, where applicable, each filing of an employee benefit plan&#146;s annual
report pursuant to Section 15(d) of the Securities Exchange Act of 1934) that is
incorporated by reference in the Registration Statement shall be deemed to be a new
registration statement relating to the securities offered therein, and the offering
of such securities at that time shall be deemed to be the initial bona fide offering
thereof.
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt; margin-left: 6%">(c)&nbsp;Insofar as indemnification for liabilities arising under the Securities Act of
1933 may be permitted to directors, officers and controlling persons of the
Registrant pursuant to the foregoing provisions, or otherwise, the Registrant has
been advised that in the opinion of the Securities and Exchange Commission such
indemnification is against public policy as expressed in the Act and is, therefore,
unenforceable. In the event that a claim for indemnification against such
liabilities (other than the payment by the Registrant of expenses incurred or paid
by a director, officer or controlling person of the Registrant in the successful
defense of any action, suit or proceeding) is asserted by such director, officer or
controlling person in connection with the securities being registered, the
Registrant will, unless in the opinion of its counsel the matter has been settled by
controlling precedent, submit to a court of appropriate jurisdiction the question
whether such indemnification by it is against public policy as expressed in the Act
and will be governed by final adjudication of such issue.
</DIV>


<P align="center" style="font-size: 10pt"><!-- Folio -->-3-<!-- /Folio -->
</DIV>

<!-- PAGEBREAK -->
<P><HR noshade><P>
<H5 align="left" style="page-break-before:always">&nbsp;</H5><P>

<DIV style="font-family: 'Times New Roman',Times,serif">




<DIV align="center" style="font-size: 10pt; margin-top: 18pt"><B>SIGNATURES</B>
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Pursuant to the requirements of the Securities Act of 1933, the Registrant certifies that it
has reasonable grounds to believe that it meets all of the requirements for filing on Form S-8 and
has duly caused this Registration Statement to be signed on its behalf by the undersigned,
thereunto duly authorized, in the City of St. Paul, State of Minnesota, on April 24, 2009.
</DIV>


<TABLE width="100%" border="0" cellspacing="0" cellpadding="0" style="font-size: 10pt">
<TR>
    <TD width="48%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="35%">&nbsp;</TD>
    <TD width="15%">&nbsp;</TD>
</TR>
<TR>
    <TD valign="top" align="left">&nbsp;</TD>
    <TD colspan="3" align="left"><B>CARDIOVASCULAR SYSTEMS, INC.</B><BR>
&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR><TR>
    <TD align="left">&nbsp;</TD>
    <TD valign="top">By&nbsp;&nbsp;</TD>
    <TD colspan="2" style="border-bottom: 1px solid #000000" align="left">/s/ Laurence L. Betterley
&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR><TR>
    <TD align="left">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD colspan="2" align="left">Laurence L. Betterley&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR><TR>
    <TD align="left">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD colspan="2" align="left">Chief Financial Officer&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR>
<TR>
    <TD colspan="5">&nbsp;</TD>
</TR>
</TABLE>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Pursuant to the requirements of the Securities Act of 1933, this Registration Statement has
been signed below by the following persons in the capacities and on the dates indicated.
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Each of the undersigned constitutes and appoints David L. Martin and Laurence L. Betterley his
true and lawful attorney-in-fact and agent, each acting alone, with full powers of substitution and
resubstitution, for him and in his name, place and stead, in any and all capacities, to sign the
Form S-8 Registration Statement of Cardiovascular Systems, Inc. relating to the Company&#146;s Amended
and Restated 2007 Equity Incentive Plan and any or all amendments or post-effective amendments to
the Form S-8 Registration Statement, and to file the same, with all exhibits thereto, and other
documents in connection therewith, with the Securities and Exchange Commission, granting unto said
attorneys-in-fact and agents, each acting alone, full power and authority to do and perform each
and every act and thing requisite and necessary to be done in and about the premises, as fully to
all intents and purposes as the undersigned might or could do in person, hereby ratifying and
confirming all that said attorneys-in-fact and agents, each acting alone, or their substitute or
substitutes, may lawfully do or cause to be done by virtue hereof.
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Pursuant to the requirements of the Securities Act of 1933, this registration statement has
been signed by the following persons in the capacities and on the date listed below.
</DIV>

<DIV align="center">
<TABLE style="font-size: 10pt" cellspacing="0" border="0" cellpadding="0" width="100%">
<!-- Begin Table Head -->
<TR valign="bottom">
    <TD width="30%">&nbsp;</TD>
    <TD width="5%">&nbsp;</TD>
    <TD width="45%">&nbsp;</TD>
    <TD width="5%">&nbsp;</TD>
    <TD width="15%">&nbsp;</TD>
</TR>
<TR style="font-size: 8pt" valign="bottom">
    <TD nowrap align="center" style="border-bottom: 1px solid #000000"><B>Signature</B></TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" style="border-bottom: 1px solid #000000"><B>Title</B></TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" style="border-bottom: 1px solid #000000"><B>Date</B></TD>
</TR>

<!-- End Table Head -->
<!-- Begin Table Body -->
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">/s/ David L. Martin
<DIV style="font-size: 1pt; border-top: 1px solid #000000">&nbsp;</DIV>
David L. Martin
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">President, Chief Executive Officer and&nbsp;Director<br>
(principal executive officer)
</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">April 24, 2009</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">/s/ Laurence L. Betterley
<DIV style="font-size: 1pt; border-top: 1px solid #000000">&nbsp;</DIV>
Laurence L. Betterley
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Chief Financial Officer&nbsp;<br>(principal
financial and accounting officer)
</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">April 24, 2009</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">/s/ Edward Brown
<DIV style="font-size: 1pt; border-top: 1px solid #000000">&nbsp;</DIV>
Edward Brown
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;Director
</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">April 24, 2009</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">/s/ Brent G. Blackey
<DIV style="font-size: 1pt; border-top: 1px solid #000000">&nbsp;</DIV>
Brent G. Blackey
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;Director
</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">April 24, 2009</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">/s/ John H. Friedman
<DIV style="font-size: 1pt; border-top: 1px solid #000000">&nbsp;</DIV>
John H. Friedman
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;Director
</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">April 24, 2009</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">/s/ Geoffrey O. Hartzler
<DIV style="font-size: 1pt; border-top: 1px solid #000000">&nbsp;</DIV>
Geoffrey O. Hartzler
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;Director
</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">April 24, 2009</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">/s/ Roger J. Howe
<DIV style="font-size: 1pt; border-top: 1px solid #000000">&nbsp;</DIV>
Roger J. Howe
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;Director
</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">April 24, 2009</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">/s/ Augustine Lawlor
<DIV style="font-size: 1pt; border-top: 1px solid #000000">&nbsp;</DIV>
Augustine Lawlor
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;Director
</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">April 24, 2009</TD>
</TR>
<!-- End Table Body -->
</TABLE>
</DIV>


<P align="center" style="font-size: 10pt"><!-- Folio -->&nbsp;<!-- /Folio -->
</DIV>

<!-- PAGEBREAK -->
<P><HR noshade><P>
<H5 align="left" style="page-break-before:always">&nbsp;</H5><P>

<DIV style="font-family: 'Times New Roman',Times,serif">

<DIV align="center">
<TABLE style="font-size: 10pt" cellspacing="0" border="0" cellpadding="0" width="100%">
<!-- Begin Table Head -->
<TR valign="bottom">
    <TD width="30%">&nbsp;</TD>
    <TD width="5%">&nbsp;</TD>
    <TD width="45%">&nbsp;</TD>
    <TD width="5%">&nbsp;</TD>
    <TD width="15%">&nbsp;</TD>
</TR>
<TR style="font-size: 8pt" valign="bottom">
    <TD nowrap align="center" style="border-bottom: 1px solid #000000"><B>Signature</B></TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" style="border-bottom: 1px solid #000000"><B>Title</B></TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" style="border-bottom: 1px solid #000000"><B>Date</B></TD>
</TR>

<!-- End Table Head -->
<!-- Begin Table Body --><TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>

<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">/s/ Glen D. Nelson
<DIV style="font-size: 1pt; border-top: 1px solid #000000">&nbsp;</DIV>
Glen D. Nelson
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;Director
</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">April 24, 2009</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">/s/ Gary M. Petrucci
<DIV style="font-size: 1pt; border-top: 1px solid #000000">&nbsp;</DIV>
Gary M. Petrucci
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;Director
</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">April 24, 2009</TD>
</TR>
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<H5 align="left" style="page-break-before:always">&nbsp;</H5><P>

<DIV style="font-family: 'Times New Roman',Times,serif">




<DIV align="center" style="font-size: 10pt; margin-top: 18pt"><B>EXHIBIT INDEX</B>
</DIV>

<DIV align="center">
<TABLE style="font-size: 10pt" cellspacing="0" border="0" cellpadding="0" width="100%">
<!-- Begin Table Head -->
<TR valign="bottom">
    <TD width="7%">&nbsp;</TD>
    <TD width="3%">&nbsp;</TD>
    <TD width="90%">&nbsp;</TD>
</TR>
<TR style="font-size: 8pt" valign="bottom">
    <TD nowrap align="left">Exhibit</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center">&nbsp;</TD>
</TR>
<TR style="font-size: 8pt" valign="bottom">
    <TD nowrap align="left" style="border-bottom: 1px solid #000000">Number</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" style="border-bottom: 1px solid #000000">Exhibit Description</TD>
</TR>

<!-- End Table Head -->
<!-- Begin Table Body -->
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">5.1
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Opinion of Fredrikson &#038; Byron, P.A.</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">23.1
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Consent of PricewaterhouseCoopers LLP</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">23.2
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Consent of KPMG LLP</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">23.3
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Consent of Fredrikson &#038; Byron, P.A. (included in Exhibit&nbsp;5.1)</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">24.1
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Power of Attorney (included on signature page hereof)</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">99.1
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Amended and Restated 2007 Equity Incentive Plan</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">99.2*
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Form of Incentive Stock Option Agreement under the 2003 Stock Option Plan of Cardiovascular
Systems, Inc., a Minnesota corporation</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">99.3*
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Form of Nonqualified Stock Option Agreement under the 2003 Stock Option Plan of
Cardiovascular Systems, Inc., a Minnesota corporation</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">99.4*
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">2003 Stock Option Plan of Cardiovascular Systems, Inc., a Minnesota corporation</TD>
</TR>
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</TABLE>
</DIV>



<DIV align="left">
<DIV style="font-size: 3pt; margin-top: 16pt; width: 18%; border-top: 1px solid #000000">&nbsp;</DIV>
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    <TD width="1%"></TD>
    <TD width="96"></TD>
</TR>

<TR valign="top">
    <TD nowrap align="left">*</TD>
    <TD>&nbsp;</TD>
    <TD>Incorporated herein by reference to the Registration Statement on Form S-1 filed by CSI
Minnesota, Inc. (formerly known as &#147;Cardiovascular Systems, Inc.&#148;) (File No.&nbsp;333-148798) on
January&nbsp;22, 2008.</TD>
</TR>

</TABLE>




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</HTML>
[{"type": "S-8", "sequence": "1", "filename": "c50732sv8.htm", "description": "FORM S-8", "secsgml_size_bytes": 52910}]
{"company-data": {"conformed-name": "Cardiovascular Systems Inc", "cik": "0001180145", "assigned-sic": "3841", "irs-number": "841568247", "fiscal-year-end": "0630"}, "filing-values": {"form-type": "S-8", "act": "33", "file-number": "333-158755", "film-number": "09769967"}, "business-address": {"street1": "651 CAMPUS DRIVE", "city": "ST. PAUL", "state": "MN", "zip": "55112", "phone": "651-259-1600"}, "mail-address": {"street1": "651 CAMPUS DRIVE", "city": "ST. PAUL", "state": "MN", "zip": "55112"}, "former-company": {"former-conformed-name": "REPLIDYNE INC", "date-changed": "20020813"}}
S-8
UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM S-8
REGISTRATION STATEMENT
Under the Securities Act of 1933
CARDIOVASCULAR SYSTEMS, INC.
(Exact Name of Registrant as Specified in its Charter)
Delaware
84-1568247
(State or Other Juris-
diction of Incorporation
or Organization)
(I.R.S. Employer
Identification Number)
651 Campus Drive
St. Paul, Minnesota 55112-3495
(Address of Principal Executive Office and Zip Code)
Cardiovascular Systems, Inc. Amended and Restated 2007 Equity Incentive Plan
and
Stock Options Granted Under the 2003 Stock Option Plan
of Cardiovascular Systems, Inc., a Minnesota Corporation
(Full Title of the Plan)
Laurence L. Betterley
Chief Financial Officer
Cardiovascular Systems, Inc.
651 Campus Drive
St. Paul, Minnesota 55112-3495
(651) 259-1600
(Name, Address and Telephone Number, Including Area Code, of Agent for Service)
Copies to:
Robert K. Ranum, Esq.
Fredrikson & Byron, P.A.
200 South Sixth Street, Suite 4000
Minneapolis, MN 55402
Fax: (612) 492-7077
Indicate
by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company. See the definitions of "large accelerated filer," "accelerated filer" and "smaller reporting company" in Rule 12b-2 of the Exchange Act. (Check one):
Large accelerated filer
o
Accelerated filer
o
Non-accelerated filer
o
(Do not check if a smaller reporting company)
Smaller reporting company
þ
CALCULATION OF REGISTRATION FEE
Proposed
Proposed Maximum
Maximum
Title of Securities
Amount to be
Offering Price
Aggregate
Amount of
to be Registered
Registered(1)
Per Share(2)
Offering Price(2)
Registration Fee
Awards to purchase
Common Stock under
the Amended and
Restated 2007
Equity Incentive
Plan
Indefinite
$
0.00
$
0.00
$
0.00
Common Stock awards
and issuable upon
exercise of awards
granted under the
Amended and
Restated 2007
Equity Incentive
Plan
2,509,969
$6.86
$17,218,387.34
$960.79
Common Stock
issuable upon
exercise of options
assumed by
Registrant (3)
2,102,828
$6.86
$14,425,400.08
$804.94
TOTAL:
$1,765.73
(1)
In addition, pursuant to Rule 416 under the Securities Act of 1933, there is also being
registered hereunder an indeterminate number of shares of interests to be offered or sold
pursuant to the employee benefit plan described herein and any additional securities which may
become issuable pursuant to antidilution provisions of the plan.
(2)
Estimated pursuant to Rule 457(h) solely for the purpose of calculating the registration fee
and based upon the average of the high and low prices of the Registrant's Common Stock on
April 23, 2009.
(3)
In connection with the closing of the merger on February 25, 2009 contemplated by that
certain Agreement and Plan of Merger and Reorganization (the "Merger Agreement") among the
Registrant (formerly known as Replidyne, Inc.), Responder Merger Sub, Inc. and Cardiovascular
Systems, Inc., a Minnesota corporation ("CSI-Minnesota"), dated as of November 3, 2008, the
Registrant assumed all outstanding stock options under CSI-Minnesota's 2003 Stock Option Plan,
which became exercisable for shares of the Registrant's Common Stock, as adjusted in
accordance with the conversion ratio under the Merger Agreement. This registration statement
registers the shares of the Registrant's Common Stock underlying outstanding stock options
held by the Issuer's current employees that were issued prior to the merger pursuant to
CSI-Minnesota's 2003 Stock Option Plan.
PART I
As permitted by the rules of the Securities and Exchange Commission, this registration
statement omits the information specified in Part I of Form S-8. The documents containing the
information specified in Part I of this registration statement will be sent or given to eligible
employees as specified in Rule 428(b)(1) promulgated under the Securities Act of 1933, as amended
(the "Securities Act"). Such documents are not being filed with the Commission either as part of
this registration statement or as prospectuses or prospectus supplements pursuant to Rule 424
promulgated under the Securities Act. These documents and the documents incorporated by reference
in the registration statement pursuant to Item 3 of Part II of this form, taken together,
constitute a prospectus that meets the requirements of Section 10(a) of the Securities Act.
PART II
INFORMATION REQUIRED IN THE REGISTRATION STATEMENT
Item 3.
Incorporation of Documents by Reference.
The following documents, previously filed with the Securities and Exchange Commission (the
"Commission"), are hereby incorporated by reference herein:
1.
Annual Report on Form 10-K for the year ended December 31, 2008 filed with the
Commission by the Registrant (formerly known as Replidyne, Inc.) on February 24, 2009;
2.
Current Reports on Form 8-K filed with the Commission by the Registrant on March 3,
2009,  March 18, 2009, and April 17, 2009; and
3.
The description of the Registrant's common stock set forth in the registration
statement on Form 8-A filed with the Commission on June 26, 2006, including any amendments
or reports filed for the purpose of updating such information.
All documents subsequently filed by the Registrant pursuant to Sections 13(a), 13(c), 14 and
15(d) of the Securities Exchange Act of 1934, prior to the filing of a post-effective amendment
which indicates that all securities offered have been sold or which deregisters all such securities
then remaining unsold, shall be deemed to be incorporated by reference in this Registration
Statement and to be a part hereof from the date of filing of such documents.
Item 4.
Description of Securities.
Not applicable.
Item 5.
Interests of Named Experts and Counsel.
Not applicable.
Item 6.
Indemnification of Directors and Officers.
Under provisions of the Registrant's Bylaws, each person who is or was a director or officer
of the Company shall be indemnified by the Company to the full extent not prohibited by the General
Corporation Law of Delaware against any liability, cost or expense asserted against such director
or officer and incurred by such director or officer in any such person's capacity as director or
officer, or arising out of any such person's status as a director or officer. Additionally, the
Registrant has entered into indemnity agreements with each of its directors and officers pursuant
to which the Registrant has agreed to indemnify those individuals for liabilities incurred by them
as a result of their service as an officer or director to the fullest extent permitted by the
Delaware General Corporation Law as such law may from time to time be amended. The Registrant has
also purchased liability insurance policies covering its directors and officers to provide
protection where the Registrant cannot indemnify a director or officer.
Item 7.
Exemption from Registration Claimed.
Not applicable.
-1-
Item 8.
Exhibits.
5.1
Opinion of Fredrikson & Byron, P.A.
23.1
Consent of PricewaterhouseCoopers LLP
23.2
Consent of KPMG LLP
23.3
Consent of Fredrikson & Byron, P.A. (included in Exhibit 5.1)
24.1
Power of Attorney (included on signature page hereof)
99.1
Amended and Restated 2007 Equity Incentive Plan
99.2*
Form of Incentive Stock Option Agreement under the 2003 Stock
Option Plan of Cardiovascular Systems, Inc., a Minnesota corporation
99.3*
Form of Nonqualified Stock Option Agreement under the 2003
Stock Option Plan of Cardiovascular Systems, Inc., a Minnesota corporation
99.4*
2003 Stock Option Plan of Cardiovascular Systems, Inc., a
Minnesota corporation
*
Incorporated herein by reference to the Registration Statement on Form S-1
filed by CSI Minnesota, Inc. (formerly known as "Cardiovascular Systems, Inc.") (File
No. 333-148798) on January 22, 2008.
Item 9.
Undertakings.
(a) The undersigned Registrant hereby undertakes:
(1) To file, during any period in which offers or sales are being made, a
post-effective amendment to this Registration Statement:
(i) To include any prospectus required by Section 10(a)(3) of the
Securities Act of 1933;
(ii) To reflect in the prospectus any facts or events arising after
the effective date of the Registration Statement (or the most recent
post-effective amendment thereof) which, individually or in the
aggregate, represent a fundamental change in the information set
forth in the Registration Statement;
(iii) To include any material information with respect to the plan of
distribution not previously disclosed in the Registration Statement
or any material change to such information in the Registration
Statement;
Provided, however, that paragraphs (a)(1)(i) and (a)(1)(ii) of this
section do not apply if the information required to be included in a
post-effective amendment by those paragraphs is contained in periodic
reports filed by the Registrant pursuant to Section 13 or Section
15(d) of the Securities Exchange Act of 1934 that are incorporated by
reference in the Registration Statement.
(2) That, for the purpose of determining any liability under the Securities
Act of 1933, each such post-effective amendment shall be deemed to be a new
Registration Statement relating to the securities offered therein, and the
offering of such securities at that time shall be deemed to be the initial
bona fide offering thereof.
-2-
(3) To remove from registration by means of a post-effective amendment any
of the securities being registered which remain unsold at the termination of
the offering.
(b) The undersigned Registrant hereby undertakes that, for purposes of determining
any liability under the Securities Act of 1933, each filing of the Registrant's
annual report pursuant to Section 13(a) or Section 15(d) of the Securities Exchange
Act of 1934 (and, where applicable, each filing of an employee benefit plan's annual
report pursuant to Section 15(d) of the Securities Exchange Act of 1934) that is
incorporated by reference in the Registration Statement shall be deemed to be a new
registration statement relating to the securities offered therein, and the offering
of such securities at that time shall be deemed to be the initial bona fide offering
thereof.
(c) Insofar as indemnification for liabilities arising under the Securities Act of
1933 may be permitted to directors, officers and controlling persons of the
Registrant pursuant to the foregoing provisions, or otherwise, the Registrant has
been advised that in the opinion of the Securities and Exchange Commission such
indemnification is against public policy as expressed in the Act and is, therefore,
unenforceable. In the event that a claim for indemnification against such
liabilities (other than the payment by the Registrant of expenses incurred or paid
by a director, officer or controlling person of the Registrant in the successful
defense of any action, suit or proceeding) is asserted by such director, officer or
controlling person in connection with the securities being registered, the
Registrant will, unless in the opinion of its counsel the matter has been settled by
controlling precedent, submit to a court of appropriate jurisdiction the question
whether such indemnification by it is against public policy as expressed in the Act
and will be governed by final adjudication of such issue.
-3-
SIGNATURES
Pursuant to the requirements of the Securities Act of 1933, the Registrant certifies that it
has reasonable grounds to believe that it meets all of the requirements for filing on Form S-8 and
has duly caused this Registration Statement to be signed on its behalf by the undersigned,
thereunto duly authorized, in the City of St. Paul, State of Minnesota, on April 24, 2009.
CARDIOVASCULAR SYSTEMS, INC.
By
/s/ Laurence L. Betterley
Laurence L. Betterley
Chief Financial Officer
Pursuant to the requirements of the Securities Act of 1933, this Registration Statement has
been signed below by the following persons in the capacities and on the dates indicated.
Each of the undersigned constitutes and appoints David L. Martin and Laurence L. Betterley his
true and lawful attorney-in-fact and agent, each acting alone, with full powers of substitution and
resubstitution, for him and in his name, place and stead, in any and all capacities, to sign the
Form S-8 Registration Statement of Cardiovascular Systems, Inc. relating to the Company's Amended
and Restated 2007 Equity Incentive Plan and any or all amendments or post-effective amendments to
the Form S-8 Registration Statement, and to file the same, with all exhibits thereto, and other
documents in connection therewith, with the Securities and Exchange Commission, granting unto said
attorneys-in-fact and agents, each acting alone, full power and authority to do and perform each
and every act and thing requisite and necessary to be done in and about the premises, as fully to
all intents and purposes as the undersigned might or could do in person, hereby ratifying and
confirming all that said attorneys-in-fact and agents, each acting alone, or their substitute or
substitutes, may lawfully do or cause to be done by virtue hereof.
Pursuant to the requirements of the Securities Act of 1933, this registration statement has
been signed by the following persons in the capacities and on the date listed below.
Signature
Title
Date
/s/ David L. Martin
David L. Martin
President, Chief Executive Officer and Director
(principal executive officer)
April 24, 2009
/s/ Laurence L. Betterley
Laurence L. Betterley
Chief Financial Officer
(principal
financial and accounting officer)
April 24, 2009
/s/ Edward Brown
Edward Brown
Director
April 24, 2009
/s/ Brent G. Blackey
Brent G. Blackey
Director
April 24, 2009
/s/ John H. Friedman
John H. Friedman
Director
April 24, 2009
/s/ Geoffrey O. Hartzler
Geoffrey O. Hartzler
Director
April 24, 2009
/s/ Roger J. Howe
Roger J. Howe
Director
April 24, 2009
/s/ Augustine Lawlor
Augustine Lawlor
Director
April 24, 2009
Signature
Title
Date
/s/ Glen D. Nelson
Glen D. Nelson
Director
April 24, 2009
/s/ Gary M. Petrucci
Gary M. Petrucci
Director
April 24, 2009
EXHIBIT INDEX
Exhibit
Number
Exhibit Description
5.1
Opinion of Fredrikson & Byron, P.A.
23.1
Consent of PricewaterhouseCoopers LLP
23.2
Consent of KPMG LLP
23.3
Consent of Fredrikson & Byron, P.A. (included in Exhibit 5.1)
24.1
Power of Attorney (included on signature page hereof)
99.1
Amended and Restated 2007 Equity Incentive Plan
99.2*
Form of Incentive Stock Option Agreement under the 2003 Stock Option Plan of Cardiovascular
Systems, Inc., a Minnesota corporation
99.3*
Form of Nonqualified Stock Option Agreement under the 2003 Stock Option Plan of
Cardiovascular Systems, Inc., a Minnesota corporation
99.4*
2003 Stock Option Plan of Cardiovascular Systems, Inc., a Minnesota corporation
*
Incorporated herein by reference to the Registration Statement on Form S-1 filed by CSI
Minnesota, Inc. (formerly known as "Cardiovascular Systems, Inc.") (File No. 333-148798) on
January 22, 2008.