Thoratec Corporation (Thoratec) is a manufacturer of mechanical circulatory support products for use by patients with heart failure (HF). The Company develops, manufactures and markets medical devices used for circulatory support. It also develops, manufactures and markets point-of-care diagnostic test systems and skin incision products. Thoratec operates in two operating divisions: Cardiovascular and International Technidyne Corporation (ITC), a wholly owned subsidiary. The Cardiovascular segment develops, manufactures and markets medical devices used for mechanical circulatory support (MCS). ITC designs, develops, manufactures and markets point-of-care diagnostic test systems and incision products. The Company conducts business both in the United States and internationally.