1. From the Department of Medicine, Cardiology Division, and the Department of Radiology, Columbia University College of Physicians and Surgeons, New York, NY (A.J.E.); Penn State University College of Medicine, Milton S. Hershey Medical Center, Hershey, Pa (K.W.M.); Cardiovascular Consultants, PC, and Mid America Heart Institute, Kansas City, Mo (R.C.T.); Cleveland Clinic, Cleveland, Ohio (M.D.C.); and Mount Sinai Medical Center, New York, NY (M.J.H.).