Ventricular tachycardia and fibrillation with implanted electrical pacemakers.
D000368:Aged; D005260:Female; D006327:Heart Block / Q000628:therapy; D006801:Humans; D008297:Male; D010138:Pacemaker, Artificial / Q000009:adverse effects*; D013610:Tachycardia / Q000209:etiology*; D014693:Ventricular Fibrillation / Q000209:etiology