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将71例急性心肌梗塞（AMI）患者随机分为2组，极化镁组33例，每日输注25％硫酸镁8ml，加入50mml极化液中静点，连用2周；对照组38例，每日输往极化液500ml。对其心电监护及常规12心导联心电图分析，结果发现：极化镁组与对照组室上性心律失常及传导阻滞无显著性差异（P＞0．05）．而极化镁组的室性心律失常的发生率明显低于对照组（P＜0．001），与对照组有非常显著性差异。以上表明静脉输注极化镁有抗心律失常，预防心律失常作用，是一种较为有效、理想、安全和简便的方法。
71 patients with acute myocardial infarction (AMI) were randomly divided into two groups, 33 cases of magnesium group, daily infusion of 25% magnesium sulfate 8ml, adding 50mml polarization solution in the static point for 2 weeks; control group of 38 patients , The daily output of 500ml polarized solution. Electrocardiogram monitoring and conventional 12-lead ECG analysis showed that there was no significant difference in the supraventricular arrhythmias and conduction block between the Polaroid magnesium group and the control group (P> 0.05). The incidence of ventricular arrhythmia in the group of Polarization magnesium was significantly lower than that in the control group (P <0.001), which was significantly different from the control group. The above shows that intravenous injection of magnesium has anti-arrhythmia, prevention of arrhythmia, is a more effective, ideal, safe and easy way.