摘要
目的评价自主神经活动在短暂心肌缺血中的调节作用。方法检测25例冠心病患者24小时动态心电图中的47次短暂心肌缺血发作事件 ,分析心肌缺血发作前、发作期间及发作停止后的心率变异性。结果在心肌缺血发作期间 ,心率变异性降低。时域参数SDANN、RMSSD、PNN50显著降低 ,频域参数HF亦下降 ,LF未见增加 ,LF/HF无显著差异。结论在日常活动发生的短暂心肌缺血中 ,副交感神经活动减弱可能起重要作用。
Objective To evaluate role of autonomic nervous activity during transient ischemic events. Methods Detected forty_seven ischemic episodes of twenty_five patients in 24_hour Holter recordings and analyzed parameters of heart rate variability(HRV) before,during and after transient ischemia. Results Depression of HRV was found during entire ischemic episode.Time_dependent index of HRV SDANN,RMSSD,PNN 50 clearly decreased,so did high_frequency power(HF) in HRV spectrum analysis.Low_frequency power(LF) and LF/HF didn′t increase. Conclusion Results suggest that a vagal depression may influence onset of transient ischemia in daily life.
出处
《心电学杂志》
2001年第3期143-144,共2页
Journal of Electrocardiology(China)
关键词
动态心电图
心肌缺血
心率变异性
自主神经
Ambulatory electrocardiography Myocardial ischemia Heart rate variability Autonomic nerves
