1. From Brigham and Women’s Hospital Cardiovascular Division, Advanced Heart Disease Section, Boston, Mass (L.W.S.); the Heart Failure and Transplant Program, Department of Medicine, Section of Cardiology, Tulane University School of Medicine (T.H.L.J.); Cardiovascular Research, Department of Medicine, Section of Cardiology, Tulane University School of Medicine; and Department of Biomedical Engineering, Tulane University School of Engineering (E.U.A.), New Orleans, La.