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用心率变异性谱分析法研究振动性白指患者自主神经系统对冷刺激的反应(英文)

Autonomic Nervous Response to Cold Provocation in Vibration Induced White Finger(VWF) Patients with HRV Analysis
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摘要 目的研究振动性白指患者的自主神经系统对冷刺激的反应。方法22名振动性白指患者(VWF组)及19名正常对照(对照组)进行了局部冷水刺激实验,记录受试者的心电信号,实验后将记录的心电信号通过处理转化为RR间期信号,然后对这些RR间期信号进行功率谱分析,计算标准化的LF(0.02~0.15Hz)功量(LF%),标准化的HF(0.15~0.40Hz)功量(HF%),以及LF/HF比率。结果冷暴露开始后,VWF组及对照组的HF%与暴露前的水平相比都有显著下降,VWF组的LF/HF比率与暴露前的水平相比有显著增大,而且冷暴露中VWF组的LF/HF比率显著高于对照组的相应的LF/HF比率。结论冷刺激导致VWF组和对照组的副交感神经活动减弱,但对照组还能保持交感与副交感的平衡,而VWF组却不能保持两者平衡,交感神经活动明显占优,冷刺激中VWF组LF/HF比率明显高于对照组的LF/HF比率说明振动性白指患者的交感神经系统对冷刺激可能存在过敏反应。 Objective To evaluate the autonomic nervous response of Vibration induced white finger(VWF) patients to cold provocation test by power spectral analysis of heart rate variability(HRV). Methods The cold provocation test was conducted in 22 VWF patients and 19 healthy volunteers.ECG was recorded during the experiment,and converted to R R interval signals after the experiment.The normalized LF[(0.02~0.15) Hz] component power, normalized HF[(0.15~0.40) Hz] component power and the ratio of LF to HF power(LF/HF ratio) were calculated. Results At the beginning of cold exposure,there were a significant decrease of HF% in both groups,and a significant increase of LF/HF ratio in VWF group as compared with pre exposure value. The LF/HF ratio in VWF group during cold exposure was significantly higher than that in the control group. Conclusion Cold stimuli induced depression of parasympathetic nervous system in both groups, and the sympatho-vagal balance was maintained in the control group,but in VWF group it became sympathetic dominance during cold exposure. The sympathetic nervous system of VWF patients may be hyperreactive to cold stimuli.
出处 《航天医学与医学工程》 CAS CSCD 1999年第1期6-9,共4页 Space Medicine & Medical Engineering
关键词 振动性白指 心率变异性 自主神经系统 冷应激 vibration induced white finger(VWF) heart rate variability power spectral analysis autonomic nervous system cold stress
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