动物实验表明血镁降低会导致心律失常、冠脉痉挛、增加儿茶酚胺引起心肌坏死的发生率;人的低血镁与心律失常的高发生率、心功能不全的症状、缺血性心脏性猝死有关。急性心肌梗塞(AMI)者的血镁可正常或短暂降低,其持续时间一般不超过48小时,而AMI后的初48小时的死亡率和心律失常发生率均很高,作者的随机双盲对照研究表明,对AMI患者即时静注镁具有有益作用。 Animal experiments show that reduced blood magnesium can lead to arrhythmia, coronary spasm, increase the incidence of myocardial necrosis caused by catecholamines; human hypomagnesemia and arrhythmia, high incidence of heart failure, ischemic sudden cardiac death . Acute myocardial infarction (AMI) were normal or transient decrease in blood magnesium, the duration of which generally does not exceed 48 hours, while the first 48 hours after AMI mortality and arrhythmia incidence were high, the authors randomized double-blind control Studies have shown that AMI patients with immediate intravenous magnesium has a beneficial effect.