लेखक: William G. Stevenson

David J. Wilber, MD Cardiovascular Institute Loyola University Medical Center Maywood, IL, USA Douglas L. Packer, MD Division of Cardiac Electrophysiology/Cardiology Department of Internal Medicine Mayo Clinic and Foundation Rochester, MN, USA William G. Stevenson, MD Director, Clinical Cardiac Electrophysiology Program Brigham and Women”s Hospital Associate Professor of Medicine Harvard Medical School Boston, MA, USA