1. From the Departments of Anesthesia and Medicine and Division of Cardiology (A.G., M.R., D.N., Y.M., J.T., M.E.P.-I., P.M., G.E., C.B., S.V., M.B., K.U., T.H., P.A., J.K., A.L.), Brigham and Women’s Hospital, Harvard Medical School, Boston, Mass; Department of Physiology (C.O., T.H.H.), New York Medical College, Valhalla, New York 10595; and Institute of Molecular Cardiology (B.D., S.K.S., R.B.), University of Louisville, Ky.