title: Electrophysiologic testing for patients with sinus node dysfunction.
mesh_terms: D000368:Aged; D001146:Arrhythmia, Sinus / Q000175:diagnosis*; D001145:Arrhythmias, Cardiac / Q000175:diagnosis*; D001281:Atrial Fibrillation / Q000150:complications; D001285:Atropine; D001919:Bradycardia / Q000175:diagnosis; D002304:Cardiac Pacing, Artificial / Q000379:methods; D004554:Electric Countershock; D004562:Electrocardiography; D005080:Exercise Test; D006801:Humans; D007545:Isoproterenol; D010138:Pacemaker, Artificial; D012848:Sinoatrial Block / Q000175:diagnosis; D013610:Tachycardia / Q000175:diagnosis
chemical_list: D001285:Atropine; D007545:Isoproterenol