对于阵发性房颤的治疗，临床上多首选西地兰静脉注射，但疗效欠佳，而β阻滞剂和钙拮抗剂又有过度降低血压和抑制心肌收缩力之虞［２］。为了寻找更有效、安全的治疗方法，我们采用随机双盲、安慰剂对照方法观察镁盐对快速房颤的治疗效果。１　资料与方法１．１　病例选择　从 For the treatment of paroxysmal atrial fibrillation, more preferred cedilanid intravenous injection clinically, but poor efficacy, and β blockers and calcium antagonists have excessive blood pressure and inhibit myocardial contractility [2]. In an effort to find more effective and safe treatments, we used a randomized, double-blind, placebo-controlled trial to evaluate the therapeutic effect of magnesium salts on AF. 1 Materials and Methods 1.1 Case Selection from