From the Division of Cardiovascular Diseases and Department of Internal Medicine (M.F.E., R.R.G., M.S.T., A.L., M.S., P.J.B., M.P., C.S.R., S.N.H., R.G.), and Department of Radiology (T.J.V.), Mayo Clinic College of Medicine, Rochester, MN. (At 2014-10)