CSII Cardiovascular Systems Inc

Cardiovascular Systems, Inc. (Nasdaq: CSII), a medical device company developing and commercializing innovative, interventional treatment systems for vascular disease, will present at the Eighth Annual JMP Securities Research Conference at The Ritz-Carlton, San Francisco. President and Chief Executive Officer David L. Martin, and Chief Financial Officer Laurence L. Betterley, will provide an overview of the company.

WHEN:

� 3 p.m. PST (5 p.m. CST, 6 p.m. EST) Tuesday, May 19, 2009 �

WEBCAST:

To listen to a live webcast of the presentation, go to the investor information section of the company�s Web site, www.csi360.com, and click on the webcast icon. The webcast replay will be available beginning at 6 p.m. CST, the same day.

� If you have any difficulty accessing the webcast, please contact

Mick Forgey: (612) 455-1789; mforgey@psbpr.com

About Cardiovascular Systems, Inc.

Cardiovascular Systems, Inc. is a medical device company focused on developing and commercializing interventional treatment systems for vascular disease. The company's Diamondback 360�� System is capable of treating a broad range of plaque types both above and below the knee, including calcified vessel lesions, and addresses many of the limitations associated with existing treatment alternatives. In August 2007, the U.S. FDA granted 510(k) clearance for the use of the Diamondback 360� as a therapy for PAD (peripheral arterial disease), and CSI commenced a U.S. product launch in September 2007. The Diamondback 360� system has been adopted by nearly 500 hospitals across the United States. For more information visit the company's Web site at www.csi360.com.