1 Department of Cardiovascular Medicine, Cleveland Clinic, Cleveland, Ohio; Center for the Diagnosis and Treatment of Pericardial Diseases, Department of Cardiovascular Medicine, Heart and Vascular Institute, Cleveland Clinic, Cleveland, Ohio. Electronic address: kleina@ccf.org.
2 Department of Cardiovascular Medicine, Cleveland Clinic, Cleveland, Ohio; Center for the Diagnosis and Treatment of Pericardial Diseases, Department of Cardiovascular Medicine, Heart and Vascular Institute, Cleveland Clinic, Cleveland, Ohio.