Mg~(2+)是人体内四种重要的离子之一,是体内许多酶的激动剂。近年来的一些研究报道:Mg~(2+)还具有抗心律失常作用。本文通过5种实验性动物心律失常模型,观察了MgSO_4的抗心律失常作用。实验结果见到MgSO_4;①可对抗氯仿诱发小鼠室颤。②可使BaCl_2所致大鼠心律失常转为窦性心律。③能对抗氯仿— Mg~(2+) is one of the four important ions in the human body and it is an agonist of many enzymes in the body. In recent years, some studies have reported that Mg 2+ also has antiarrhythmic effects. In this paper, the antiarrhythmic effect of MgSO4 was observed in five experimental animal arrhythmia models. The experimental results showed that MgSO_4; 1 can resist chloroform induced ventricular fibrillation in mice. 2 The BaCl 2 -induced rat arrhythmia can be converted to sinus rhythm. 3 against chloroform -