The device system that will be implanted consists of a St. Jude Medical CRT-D and three pacing leads (insulted wires that carry electrical energy from the device to the heart). One lead is placed in the upper right chamber of the heart (atrium), a second lead is placed in the lower right chamber of the heart (right ventricle) and the third lead is placed within a vein that runs along the outside of the heart and is positioned at a location near the left lower chamber of the heart (left ventricle).