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Cardiovascular Systems is a medical technology company that develops, manufactures, and markets devices to treat vascular diseases. The Company offers peripheral arterial disease products, which are catheter-based platforms for treating a range of plaque types in leg arteries above and below the knee, including calcified plaque, as well as address various limitations associated with surgical, catheter, and pharmacological treatment alternatives. It also provides an atherectomy device for the treatment of calcified coronary arteries.