Effects of controlled breathing, mental activity and mental stress with or without verbalization on heart rate variability
Effects of controlled breathing, mental activity and mental stress with or without verbalization on heart rate variability
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DOI：
10.1016/s0735-1097(00)00595-7
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发表时间：
2000-05-01
影响因子：
24
通讯作者：
Sleight, P
中科院分区：
文献类型：
--
作者：
Bernardi, L;Wdowczyk-Szulc, J;Sleight, P
为了评估说话或阅读（无声或大声）是否会影响心率变异性（HRV），以及这些变化在多大程度上需要同时记录呼吸活动才能正确解释。背景从短期和长期HRV记录中获得的功率谱中交感神经占主导地位预测了一些心脏疾病的预后不良。心率变异性往往记录没有测量呼吸;缓慢的呼吸可能会人为地增加RR间期（RR）的低频功率，并错误地模仿交感神经activation.METHODS在12名健康志愿者中，我们评估了自由交谈和阅读，安静和大声，对呼吸，RR和血压（BP）的影响。我们还比较了自主呼吸与控制呼吸和心算，沉默或大声。结果与自主呼吸相比，阅读使呼吸速度增加（p < 0.05），平均RR和RR变异性降低，血压升高。大声阅读、自由交谈和心算使呼吸频率向LF频段移动，从而使LF%增加，HF%降低，RR和呼吸的变化程度相似，平均RR降低，但粗RR变异性差异较小。结论简单的心理和言语活动通过呼吸频率的变化显著影响HRV。在分析HRV而不同时采集和分析呼吸时，应考虑这种可能性。(C)2000年，美国心脏病学会。
OBJECTIVES To assess whether talking or reading (silently or aloud) could affect heart rate variability (HRV) and to what extent these changes require a simultaneous recording of respiratory activity to be correctly interpreted.BACKGROUND Sympathetic predominance in the power spectrum obtained from short- and long-term HRV recordings predicts a poor prognosis in a number of cardiac diseases. Heart rate variability is often recorded without measuring respiration; slow breaths might artefactually increase low frequency power in RR interval (RR) and falsely mimic sympathetic activation.METHODS In 12 healthy volunteers we evaluated the effect of free talking and reading, silently and aloud, on respiration, RR and blood pressure (BP). We also compared spontaneous breathing to controlled breathing and mental arithmetic, silent or aloud. The power in the so called low(LF) and high-frequency (HF) bands in RR and BP was obtained from autoregressive power spectrum analysis.RESULTS Compared with spontaneous breathing, reading silently increased the speed of breathing (p < 0.05), decreased mean RR and RR variability and increased BP. Reading aloud, free talking and mental arithmetic aloud shifted the respiratory frequency into the LF band, thus increasing LF%, and decreasing HF% to a similar degree in both RR and respiration, with decrease in mean RR but with minor differences in crude RR variability.CONCLUSIONS Simple mental and verbal activities markedly affect HRV through changes in respiratory frequency. This possibility should be taken into account when analyzing HRV without simultaneous acquisition and analysis of respiration. (C) 2000 by the American College of Cardiology.