心肌梗死(简称心梗)早期发生的室性心律失常可能与交感神经失支配有关,而心梗慢性期发生的室性心律失常则与交感神经过度支配和分布异常有关,交感神经重构在室性心律失常和猝死的发生中占有重要地位,β受体阻滞剂可能有改善交感神经重构的作用,从而减少致命性心律失常和猝死的发生。 Early onset of myocardial arrhythmias in myocardial infarction (MI) may be related to loss of sympathetic dysfunction, and ventricular arrhythmia in chronic phase of myocardial infarction is associated with over-domination and abnormal distribution of sympathetic nerves, sympathetic remodeling in the room Arrhythmia and sudden death play an important role in the occurrence of β-blockers may improve the role of sympathetic remodeling, thereby reducing the incidence of fatal arrhythmias and sudden death.