摘要
心率变异性(HRV)分析是非侵入性评估自主神经功能的常用方法。在许多研究中,低频变异性(LF,如通过快速傅立叶变换产生的功率谱中所示的<0.15 Hz)被认为是交感神经功能的指标,高频变异性(HF,>0.15 Hz)作为副交感神经功能的指标。通过对15位心-身锻练习练者和20位非习练者的对照研究,我们发现以下是影响HRV的重要因素。第一,呼吸周期的频率反映在由呼吸性窦性心律不齐(RSA)产生的功率谱中的峰值频率中。在涉及年轻受试者的情况下,即使以单一速率严格控制他们的呼吸,也能在功率谱中看到多个峰;第二,由RSA产生的HRV峰的大小取决于每次呼吸的潮气量和受试者的姿势;第三,在相同条件下,与年龄较大的受试者(年龄在50~70岁)相比,年轻受试者(年龄在20~25岁)通常显示更大的RSA峰值。这种效应常常掩盖了基于其他因素的差异,例如多年的心-身锻练。总之,这项研究表明了HRV分析用于评估自主神经功能的心-身研究可以作为一个有用的工具,但需注意必须采取措施控制所有上述因素。
Heart rate variability( HRV) analysis is a common method to non-invasively evaluate autonomic nervous function. In many studies,low frequency variability( LF, < 0. 15 Hz as shown in the power spectrum produced by Fast Fourier Transformation) is taken as an indicator of sympathetic function and high frequency variability( HF,≥0. 15 Hz) as an indicator of parasympathetic function. Based on studies on over 20 control subjects and 15 mind/body practitioners,we found that the following are important factors that influence HRV. First,the frequency of the breathing cycle is reflected in the frequency of a peak in the power spectrum produced by respiratory sinus arrhythmia( RSA). In some cases involving younger subjects,multiple peaks can be seen in the power spectrum even though they were strictly controlling their breathing at a single rate. Second,the size of the HRV peak produced by RSA is dependent on the tidal volume of each breath and the posture of the subject. Third,under the same conditions,younger subjects( aging 20's-25's) generally show a larger RSA peak compared to older subjects( aging 50's-70's). This effect often overshadows differences based on other considerations,such as years of experience in mind-body practice. In conclusion,this study shows that HRV analysis can be a useful tool for assessing autonomic nervous function in mind-body research,but great care must be taken to control for all of the factors indicated above.
出处
《实用心电学杂志》
2017年第2期91-93,共3页
Journal of Practical Electrocardiology
基金
劳伦斯.洛克菲勒基金会/塞缪爱利能源医学研究计划
约瑟夫和李索林中医药研究基金~~
关键词
心率变异性
呼吸性窦性心律不齐
自主神经功能
心-身研究
heart rate variability
respiratory sinus arrhythmia
autonomic nervous function
mind-body research
