乙胺碘呋酮是一种疗效佳而毒性较低的抗快速心律失常药。除常见的副作用外,口服该药致扭转型室性心动过速(简称扭转型室速)的报道却不多见。现将我们收治的3例报道如下: 【例1】患者男性,58岁。心肌炎后遗留多源性室性早搏,口服乙胺碘呋酮治疗期间,0-T间期延长至0.56秒,QRS波宽大畸型并扭转。当即停用乙胺碘呋酮,静脉注射20％硫酸镁2克,10分钟内室性早搏及扭转型室速消失。继以每日硫酸镁3～5 Amiodarone is a potent and less toxic anti-tachyarrhythmia. In addition to the common side effects, oral administration of the drug induced torsion-type ventricular tachycardia (referred to as torsades de pointes) reports are rare. Now we receive 3 cases reported as follows: [Example 1] Male patients, 58 years old. Myocarditis left behind after multiple ventricular premature beats, oral amiodarone treatment period, 0-T interval was extended to 0.56 seconds, QRS wave large deformed and reversed. Immediately disable amiodarone, intravenous injection of 20% magnesium sulfate 2 g, 10 minutes premature ventricular contractions and reverse VT disappear. Following the daily magnesium sulfate 3 to 5