title: II. Electrocardiographic changes.
mesh_terms: D000368:Aged; D001919:Bradycardia / Q000209:etiology; D002305:Cardiac Tamponade / Q000175:diagnosis* / Q000209:etiology; D003325:Coronary Care Units; D004562:Electrocardiography; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D008991:Monitoring, Physiologic; D009203:Myocardial Infarction / Q000150:complications / Q000175:diagnosis*; D012422:Rupture, Spontaneous / Q000175:diagnosis / Q000209:etiology