Persons with severe heart failure may benefit from cardiac resynchronization therapy, or CRT. A biventricular pacemaker is the device that is implanted to provide this therapy, which synchronizes the pumping of the right and left lower chambers (ventricles) of the heart. Cardiologist, Dr. Michael Gold, explains how the pacemaker works, how it’s installed, the minimal follow up requirements and the advances in technology of the pacemaker.