Ventricular fibrillation and competitive pacing.
D000368:Aged; D006328:Cardiac Catheterization; D003645:Death, Sudden; D004562:Electrocardiography; D005260:Female; D006327:Heart Block / Q000150:complications; D006801:Humans; D009203:Myocardial Infarction / Q000209:etiology*; D010138:Pacemaker, Artificial; D013610:Tachycardia / Q000150:complications; D014693:Ventricular Fibrillation / Q000150:complications*