The treatment of congestive heart failure by implanted biventricular pacemakers, or cardiac resynchronization, has revolutionized the practice of implanting pacemakers and defibrillators. More cardiac resynchronization therapy devices than conventional pacemakers are now being implanted and the numbers are growing worldwide. The book will be useful to cardiologists, cardiac electrophysiologists, cardiac surgeons, cardiology fellows in training, intensive care specialists and anyone interested in pacing.