High Quality Content by WIKIPEDIA articles! Thoratec Corporation is a United States-based company that designs, manufactures, sells, and supports products that treat a wide range of clinical needs for advanced heart failure patients, specifically proprietary medical devices for circulatory support, vascular graft applications, point-of-care diagnostic test systems, and skin incision products. Headquartered in Pleasanton, California, U.S.A., its product lines include the Thoratec VAD (Ventricular Assist Device) and HeartMate LVAS (Left Ventricular Assist System). Thoratec’s devices are implanted in patients with advanced heart failure worldwide.