摘要
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) was found to be a noninvasive index of the autonomic nervous activity of the heart in the present study HRV was assessed in 42 patients with acute myocardial infarction (AMI) from 24-hour Holter tapes and 20 normal subjects as controls. HRV was evaluated by spectral analysis as well as the mean R-R interval standard deviation(SD). Normal persons had significantly greater HRV than patients with AMI (SD 65.18 ms vs 40.07 ms, p< 0.05). Spectral analysis in both groups showed a lowfrequency and a high-frequency peak, but the magnitude was significantly reduced in AMI patients, especilly the high-frequency component comparing with the controls. The result suggests severe impairment of autonomic innervation of the heart in AMI patients and implies increased risk of subsequent sudden cardiac death.
出处
《中国循环杂志》
CSCD
1993年第11期660-661,共2页
Chinese Circulation Journal
关键词
心肌梗塞
心率变异性
频域分析
Heart rate variability
Spectral analysis
acute myocardial Infarction
