Repetitive ventricular tachyarrhythmia: result of pacemaker failure.
D004567:Electrodes, Implanted / Q000592:standards; D006801:Humans; D008297:Male; D008875:Middle Aged; D010138:Pacemaker, Artificial / Q000009:adverse effects*; D012008:Recurrence; D013610:Tachycardia / Q000209:etiology*