1. From the Division of Cardiology, Henry Low Heart Center, Hartford Hospital, Hartford, CT (B.A.P., J.A.C., A.S.G., P.D.T.); University of Massachusetts, Amherst (P.M.C., S.M.C., J.K., S.C.); and University of Connecticut, Storrs (L.S.P., K.S., C.M.W.).