What we are studying
A CRT-D system attempts to relieve symptoms of heart failure by sending electrical signals to the right and left sides of the heart so they beat in sync. This is done by implanting a small device under the skin and placing insulated wires (leads) into the heart.
The purpose of this clinical study is to test the safety and effectiveness of the Medtronic Attain Performa quadripolar, left ventricular pacing lead. The left ventricle is the lower, left chamber of your heart which pumps blood from your heart to the rest of your body.