Ventricular arrhythmias in a patient with artificial pacemakers.
D000368:Aged; D001145:Arrhythmias, Cardiac / Q000209:etiology*; D004554:Electric Countershock; D006327:Heart Block / Q000601:surgery*; D006336:Heart Massage; D006801:Humans; D008297:Male; D010138:Pacemaker, Artificial / Q000009:adverse effects*; D011183:Postoperative Complications; D014693:Ventricular Fibrillation / Q000209:etiology*