Mohammad Shenasa, MD, Ph D, Attending Physician, Department of Cardiovascular Services, O”Connor Hospital, Heart & Rhythm Medical Group, San Jose, CA, USA. Gerhard Hindricks, MD, Professor of Medicine (Cardiology), University of Leipzig, Heart Center Director, Department of Electrophysiology, Leipzig, Germany. David J. Callans, MD, Professor of Medicine, Cardiovascular Division, Department of Medicine, University of Pennsylvania, Philadelphia, PA, USA. John M. Miller, MD, Professor of Medicine, Indiana University School of Medicine, Indianapolis, IN, USA. Mark E. Josephson, MD, Professor Emeritus, Herman C. Dana Professor of Medicine, Harvard Medical School, Chief of Cardiovascular Division, Beth Israel Deaconess Medical Center, Boston, MA, USA.