title: Coronary spasm presenting as syncope during ventricular demand pacing.
mesh_terms: D000368:Aged; D001281:Atrial Fibrillation / Q000628:therapy; D003329:Coronary Vasospasm / Q000150:complications* / Q000175:diagnosis; D004562:Electrocardiography; D006801:Humans; D008297:Male; D009200:Myocardial Contraction; D010138:Pacemaker, Artificial; D013575:Syncope / Q000209:etiology*