Dan Roth shows where the cable for his Heartmate II Left Ventricular Assist System exits his chest at his home in Norwood, Massachusetts September 20, 2010. The device, implanted inside the patient's chest and powered by external, rechargeable batteries connected by a cable coming out of the patient's side, pumps blood through the circulatory system on a continuous basis, taking over most of the heart's work. Picture taken September 20. To match Special Report HEALTH-HEART/PUMP REUTERS/Brian Snyder (UNITED STATES - Tags: HEALTH SCI TECH)