ST. PAUL, Minn.--(BUSINESS WIRE)--Cardiovascular Systems, Inc. (CSI) (NASDAQ: CSII), announced that it has completed enrollment for its Coronary Orbital Atherectomy System Trial (COAST) study. Taking place in both Japan and the United States, the study is designed to assess the safety and efficacy, as well as economic outcomes, of CSI’s new micro crown Orbital Atherectomy System (OAS) in treating severely calcified coronary lesions in patients suffering from Coronary Artery Disease (CAD). As de