1. Section of Cardiovascular Imaging, Department of Cardiovascular Medicine, Heart, Vascular and Thoracic Institute (T.K.M.W., C.A., M.C., D.H.K., C.L.J., P.C.C., M.A.B., S.D.F.‚ A.L.K.), Cleveland Clinic, Cleveland, OH.
2. Section of Cardiovascular Imaging, Imaging Institute (T.K.M.W., C.A., D.H.K., C.L.J., P.C.C., M.A.B., S.D.F.), Cleveland Clinic, Cleveland, OH.
3. Center for Diagnosis and Treatment of Pericardial Diseases, Heart and Vascular Institute (T.K.M.W., C.A.‚ D.H.K., C.L.J., P.C.C., A.L.K.), Cleveland Clinic, Cleveland, OH.
4. Department of Cardiovascular Medicine, McGill University Health Centre, Montreal, Quebec, Canada (M.C.).