1. From the Departments of Anethesiology, Surgery, and Physiology (C.Z., X.X.), LSU Health Sciences Center, New Orleans, La; the Department of Medical Physiology (W.W., L.K.), College of Medicine, Texas A&M University System Health Science Center, College Station, Tex; the Section of Cardiovascular Sciences (L.M.), Baylor College of Medicine, the Methodist Hospital, and the DeBakey Heart Center, Houston, Tex; and the Department of Physiology (B.J.P., G.J.B., W.M.C.), LSU Health Sciences Center, New...