a , b c * Stanley Nattel , Dan M. Roden , Denis Escande Department of Medicine and Research Center, Montreal Heart Institute, Department of Medicine, University of Motreal, and Department of ́ Pharmacology, McGill University, 5000 Belanger Street East, Montreal, Quebec H1T 1C8, Canada Department of Medicine, Vanderbilt University School of Medicine, Nashville, TN 37232, USA Lab. Physiopath. & Ph...