心率变异性(HRV)分析是新近发展的一种反映自主神经对心脏控制的无创性检测指标,HRV降低者易发生心源性猝死。本文对21名正常人、42例急性心肌梗塞(AMI)患者进行HRV频域分析。结果表明,24小时RR间期变异标准差AMI患者明显低于正常人,频域分析结果正常人HRV功率谱密度(PSD)高频成分在白天和夜间有一定波动,日间相对较低,夜间睡眠时增加,而低频成分则变化不大。AMI患者,PSD与正常人相比,低频和高频成分均明显下降,而高频成分下降更为明显。这提示AMI患者支配心脏的迷走和交感神经均受损,以迷走神经受损更为严重。 Heart rate variability (HRV) analysis is a newly developed noninvasive detection of cardiac control of autonomic nervous system, and HRV is prone to sudden cardiac death. In this paper, 21 normal subjects and 42 acute myocardial infarction (AMI) patients were analyzed by HRV frequency domain. The results showed that the 24-hour RR interval variation standard deviation AMI patients were significantly lower than normal, frequency domain analysis results HRH power spectral density (PSD) high frequency components fluctuate during the day and night, during the day is relatively low, night Increased sleep, while the low-frequency components did not change much. Compared with normal subjects, PSD of low frequency and high frequency of PSD in PSD patients were significantly decreased, while high frequency components decreased more obviously. This suggests that patients with AMI are dominated by cardiac vagal and sympathetic damage, to more serious damage to the vagus nerve.