Cardiovascular Systems, Inc. (CSI) is a medical device company. CSI is focused on developing and commercializing minimally invasive treatment solutions for vascular disease. Interventional endovascular treatment of peripheral artery disease (PAD) is the Company�s initial area of focus. The Company�s primary products include the Diamondback 360 PAD System (Diamondback 360), Diamondback Predator 360 PAD System (Predator 360) and Stealth 360 PAD System (Stealth 360). Diamondback 360, the Predator 360 and the Stealth 360 collectively are referred to as PAD Systems. As of June 30, 2011, the PAD Systems had been utilized in more than 50,000 procedures. It uses internally manufactured and externally sourced to manufacture the PAD Systems. In addition to the PAD Systems, CSI is expanding its product portfolio through internal product development and establishment of business relationships with other medical device companies.