1. From the Department of Anesthesia and Critical Care (F.I., R.J.S., M.K., K.D.B.), Massachusetts General Hospital, Boston; Cardiovascular Research Center (F.I., E.S.B., E.M.F., A.R.G., M.S.-C., K.D.B.) and Cardiac Ultrasound Laboratory (T.G.N., J.G.M., D.S.J., M.H.P., M.S.-C.), Cardiology Division, Department of Medicine, Massachusetts General Hospital, Boston Cardiac Muscle Research Laboratory (R.L.), Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, Mass; Boston...