78例心肌梗死患者心率变异性的临床研究

The Clinical Research of Heart Rate Variability in 78 Cases of Myocardial Infarction.

目的研究心肌梗死患者的心率变异性。方法分析78例心肌梗死患者和76例正常成人24h动态心电图心率变异性的时域指标及频域指标。结果 (1)心肌梗死患者时域分析的各项参数指标均降低。(2)心肌梗死患者的频谱成分分析有LF增加和HF降低。结论 (1)自主神经调节失衡早于临床症状出现。(2)心肌梗死后HRV的降低,反映了支配心脏的迷走神经活性下降伴交感神经活性占优势的病理状态。

Objective To study the heart rate variability of patients with myocardial infarction. Methods To analyze the time domain and frequency domain indexes indicators of the heart rate variability of 24h Holter in 78 cases of myocardial infarction patients and 76 cases of normal adults. Results （ 1 ） The time - domain analysis parameters of the myocardial infarction patients are reduced. （2） Myocardial infarction spectrum analysis showed LF was increased and HF was reduced. Conclusion （ 1 ） The regulation of the autonomic nervous imbalance appeared earlier than the clinical symptoms. （2） The reduction of HRV after myocardial infarction reflected a pathological state that the vagus nerve activity declined and the sympathetic nervous activity was dominant.