1. From the Noninvasive Cardiovascular Imaging Program, Departments of Medicine (Cardiovascular Division) and Radiology (N.M., N.K., R.Y.K., R.B.); Department of Anesthesiology (D.C.S.); Division of Cardiac Surgery, Department of Surgery (S.A.); and Boston Adult Congenital Heart Program, Department of Cardiology (M.J.L.), Brigham and Women's Hospital, Harvard Medical School, Boston, MW.