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心率变异（HRV）是反映交感、副交感神经张力及其平衡的重要指标。急性心肌梗塞（AMI）后自主神经系统的平衡发生紊乱，HRV变小，室颤及摔死的危险性增高。本文报告观察AMI患者应用β受体阻滞剂后HRV的变化。资料和方法对象：均为我院近两年住院病人，AMI组31例，男22例，女9例
Heart rate variability (HRV) is an important indicator of sympathetic, parasympathetic tone and its balance. After acute myocardial infarction (AMI) autonomic nervous system disorders occur, HRV smaller, increased risk of ventricular fibrillation and falls. This article reports the changes of HRV in patients with AMI using β-blocker. Materials and Methods Subjects: All patients were hospitalized in our hospital for nearly two years, AMI group 31 cases, 22 males and 9 females