Sections View Full Chapter Figures Tables Videos Annotate Full Chapter Figures Tables Videos Supplementary Content + Download Section PDF ++ George J. Klein, MD ++ Professor of Medicine Emeritus ++ University of Western Ontario ++ London, Ontario, Canada ++ ++ Eric N. Prystowsky, MD ++ Director, Cardiac Arrhythmia Service ++ Ascension St. Vincent Hospital, Indianapolis ++ Ascension Medical Group ++ Indianapolis, Indiana ++ Consulting Professor of Medicine ++ Duke University Medical Center ++ Durham, North Carolina