By Kenneth A. Ellenbogen, MD, Kontos Professor of Medicine, Director, Clinical Electrophysiology Section, VCU School of Medicine, Medical College of Virginia Hospital, Richmond, VA, USA; Bruce L. Wilkoff, MD, Professor, Department of Medicine, Cleveland Clinic Lerner College of Medicine of Case Western Reserve University; Director, Cardiac Pacing and Tachyarrhythmia Devices, Director: Clinical Electrophysiology Research, Cleveland Clinic Foundation, Cleveland, OH, USA; G. Neal Kay, MD, Director, Clinical Electrophysiology Section, Division of Cardiology, University of Alabama at Birmingham, Birmingham, AL; and Chu Pak Lau |