title: Electrical alternans: mechanism in pericardial effusion.
mesh_terms: D002305:Cardiac Tamponade / Q000503:physiopathology; D004562:Electrocardiography; D006321:Heart / Q000503:physiopathology*; D006329:Heart Conduction System / Q000503:physiopathology*; D006339:Heart Rate; D006689:Hodgkin Disease / Q000150:complications; D006801:Humans; D008297:Male; D010490:Pericardial Effusion / Q000209:etiology / Q000503:physiopathology*