ST. PAUL, Minn. & SAN FRANCISCO--(BUSINESS WIRE)--Cardiovascular Systems, Inc. (CSI) (Nasdaq: CSII), yesterday presented six-month data from the COMPLIANCE 360° study of severely calcified above-the-knee lesions at the 23rd Annual Transcatheter Cardiovascular Therapeutics (TCT) scientific symposium in San Francisco, sponsored by the Cardiovascular Research Foundation.