基于情绪对自主神经功能调节作用的恐怖音频对心率和心率变异性的影响研究

Influence of Frightening Audio Frequency based on Regulation of ANS by Emotion on Heart Rate and Heart Rate Variability

目的探讨恐怖音频对心率和心率变异性的影响。方法招募健康试验者70例,根据随机数字表随机分为恐怖音频组和中性音频组,各35例,分别给予恐怖音频和中性音频刺激,并同时用Actiheart心电记录仪记录音频刺激时的心率和心率变异性指标的变化。结果与接受中性音频刺激相比,恐怖音频组相邻NN间期差的均方根(RMSSD)降低〔(37.5±14.7)ms vs.(53.8±30.3)ms〕,心率〔(70.2±8.1)次/min vs.(65.2±8.2)次/min〕和低频功率与高频功率之比(LF/HF)〔(1.52±0.96)vs.(1.03±0.58)〕升高,差异均有统计学意义(P<0.05)。结论在交感-迷走平衡中,恐惧情绪可以导致迷走神经兴奋性受到抑制,交感神经功能占主导地位,从而降低RMSSD以及升高心率和LF/HF。

Objective To investigate the impact of frightening audio frequency on heart rate and its variabili- ty. Methods Seventy healthy volunteers were recruited and divided into two groups with 35 in each according to random number table. Volunteers in group 1 received neutral audio stimulation and those in group 2 received frightening audio stimulation. The heart rate and its variability of each subject were recorded during the stimulation through Actiheart device. Results Compared with group 1, in group 2 the root mean square of successive differences （RMSSD） was lower [ （37.5 ±14.7） ms vs. （53.8 ＋ 30. 3） ms], the heart rate was higher [ （70. 2 ±8. 1） /min vs. （65.2 ±8. 2） /min], and the ratio of low frequency over high frequency （LF/HF） [ （ 1.52 ±0. 96） vs. （ 1.03 ±0. 58）] increased , the differences were statistically significant （P 〈0. 05）. Conclusion The fright emotion could result in the inhibition of vagal activity and produce a sympathetic dominance, and thus reduce RMSSD, increase heart rate and LF/HF.