女性患者,47岁。出现持续性心动过缓两年余,数次心电图检查示窦性心动过缓,心率在33--53次/分之间,静脉推注阿托品1.5mg后,最高窦性心率75次/分。临床诊断:病窦综合征。1987年10月5日因发作房颤而入院。查体:心界向左下扩大,心尖区闻及奔马律。血清钾4.1mEq/L、钠132mEq/L。心电图示阵发性房颤,平均心室率76次/分,Q-T间期0.34秒。10月14日起口服乙胺碘呋酮0.2g,3次/日。一周后房颤发作次数减少,T波增宽,Q-T间期逐渐延长达0.60s。12月25日 Female patient, 47 years old. Persistent bradycardia occurred more than two years, several ECG showed sinus bradycardia, heart rate 33--53 beats / min, intravenous injection of atropine 1.5mg, the highest sinus heart rate 75 beats / min. Clinical diagnosis: sick sinus syndrome. October 5, 1987 due to atrial fibrillation and admission. Physical examination: the heart to expand to the lower left, the apex area smell gallop. Serum potassium 4.1mEq / L, sodium 132mEq / L. ECG showed paroxysmal atrial fibrillation, the average ventricular rate 76 beats / min, Q-T interval of 0.34 seconds. October 14 oral amiodarone 0.2g, 3 times / day. A week after the onset of atrial fibrillation decreased the number of T-wave broadening, Q-T interval gradually extended up to 0.60s. December 25th