1. From the Texas Heart Institute/St. Luke’s Episcopal Hospital, Houston (Y.X., G.W., N.C., J.M.K., J.S., S.A., D.Y., C.F., S.W., M.E., J.C.); Krannert Institute of Cardiology, Indiana University, Indianapolis (T.A., S.-F.L.); Engineering Technology Department, University of Houston, TX (X.Y.); and Center for Advanced Heart Failure (I.D.G.) and Section of Cardiology (Y.X., B.K.K., J.C.), University of Texas Health Science Center at Houston.