ST. PAUL, Minn.--(BUSINESS WIRE)--Cardiovascular Systems Inc. (CSI): Cardiovascular Systems Inc. (CSI), a medical device company developing and commercializing innovative interventional treatment systems for vascular disease, today reported financial results for its fiscal second quarter ended December 31, 2008. CSI also reported it expects to close its previously announced merger transaction on or about February 25, 2009, in which CSI will combine its business with Replidyne, Inc. (Nasdaq: RDYN) in an all-stock transaction. The combined company will be named Cardiovascular Systems Inc. and it has applied for listing on the Nasdaq Global Market under the symbol “CSII.”