The updated and expanded second edition of this book presents a contemporary review of the basic science, engineering technology, and clinical practice of cardiac bioelectric therapy. It covers the rapidly expanding technological development of pacemakers and defibrillators as well as ablative therapy, electrophysiological mapping, and other clinical diagnostic and therapeutic breakthroughs. The book highlights many different aspects of bioelectric therapy, including history, biophysical and computational concepts, basic electrophysiology studies, engineering technology advances, and clinical perspectives.