RESPIRATORY SINUS ARRHYTHMIA IN HUMANS - HOW BREATHING PATTERN MODULATES HEART-RATE
RESPIRATORY SINUS ARRHYTHMIA IN HUMANS - HOW BREATHING PATTERN MODULATES HEART-RATE
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DOI：
10.1152/ajpheart.1981.241.4.h620
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发表时间：
1981-01-01
影响因子：
--
通讯作者：
BISHOP, B
中科院分区：
文献类型：
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作者：
HIRSCH, JA;BISHOP, B
在自主控制潮气量、呼吸频率和自主安静呼吸时，量化呼吸性窦性心律失常幅度（RSA）与潮气量、呼吸频率的关系。坐着的受试者（17人）通过吸嘴和鼻夹呼吸，在几个呼吸频率中保持恒定的潮汐量。吸气屏气频率为零。绘制了对数RSA与每个数字卷的对数频率。频率小于6 cycles/min的较大稳定RSA称为低频截距（LFI, 20 .+-）。5胜/分钟)。低频截距仅在35岁之前与受试者的年龄成反比。在高于特征角频率的较高呼吸频率下（fc, 7.2 +-）。1.5 cycles/min) RSA随斜率不变而减小（滚降）；3.4 dB /十年)。RSA-volume的关系是线性的，允许对RSA-frequency曲线进行归一化，得到1曲线。自发呼吸数据点在这条曲线上下降。在整数比率中自愿耦合心率到呼吸频率减少了RSA的呼吸变异性而不改变平均RSA。在自主呼吸和自主呼吸过程中，低频截距、转角频率和滚离是个体rsa -频率关系的特征。
The relationship of respiratory sinus arrhythmia amplitude (RSA) to tidal volume and breathing frequency was quantified during voluntarily controlled tidal volume and breathing frequency and spontaneous quiet breathing. Seated subjects (17) breathed via mouthpiece and noseclip, maintaining constant tidal volumes at each of several breathing frequencies. Inspiratory breath hold was zero frequency. Log RSA was plotted vs. log frequency for each tital volume. The large stable RSA for frequencies less than 6 cycles/min was called low-frequency intercept (LFI, 20 .+-. 5 beats/min). Low-frequency intercept was inversely proportional to a subject''s age only to 35 yr. At higher breathing frequencies above a characteristic corner frequency (fc, 7.2 .+-. 1.5 cycles/min) RSA decreased with constant slope (roll-off; 21 .+-. 3.4 dB/decade). The RSA-volume relationship was linear permitting normalization of RSA-frequency curves for tidal volume to yield 1 curve. Spontaneous breathing data points fell on this curve. Voluntarily coupling of heart rate to breathing frequency in integer ratios reduced breath-by-breath variability of RSA without changing mean RSA. Low-frequency intercept, corner frequency and roll-off characterize an individual''s RSA-frequency relationship during both voluntarily controlled and spontaneous breathing.