Thoratec Corporation is engaged in mechanical circulatory support with a product portfolio to treat the range of clinical needs for advanced heart failure (HF) patients. The Company develops, manufactures and markets medical devices used for circulatory support. For advanced HF, its primary product lines are its ventricular assist devices (VADs), which include the Thoratec Paracorporeal Ventricular Assist Device (PVAD), the Thoratec Implantable Ventricular Assist Device (IVAD), the HeartMate Left Ventricular Assist System (HeartMate XVE), and the HeartMate II Left Ventricular Assist System (HeartMate II). For acute HF, its product lines are the CentriMag Acute Circulatory System (CentriMag) and for pediatric patients the PediMag/PediVAS Acute Circulatory System (PediMag/PediVAS). In July 2014, Thoratec Corp acquired Apica Cardiovascular Limited.