ST. PAUL, Minn. & NEW ORLEANS--(BUSINESS WIRE)--Cardiovascular Systems, Inc. (CSI) (Nasdaq: CSII), shared 12-month data from the COMPLIANCE 360° study of severely calcified above-the-knee lesions at the New Cardiovascular Horizons Annual Conference on Saturday, June 9, 2012. Dr. Barry Weinstock, Interventional Cardiologist, Orlando Regional Medical Center, Winter Park, Fla., presented data demonstrating positive outcomes and cost comparisons to the widely used percutaneous transluminal angioplasty (PTA).