Postural effect on respiratory sinus arrhythmia with various respiratory frequencies
Postural effect on respiratory sinus arrhythmia with various respiratory frequencies
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DOI：
10.2114/jpa.15.87
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发表时间：
1996-01-01
期刊：
影响因子：
--
通讯作者：
Kobayashi, Hiromitsu
中科院分区：
文献类型：
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作者：
Kobayashi, Hiromitsu
本文研究了七名健康男学生在两种不同体位下不同频率稳态呼吸时的心率变化。将呼吸频率控制在0.083，0.100，0.200，0.250Hz四个频率，潮气量同时控制在1500ml（0.083，0.100Hz）或1000ml（0.200，0.250Hz）。采用倾斜床改变体位，在水平和垂直位置进行测量。0.250Hz呼吸性窦性心律失常（RSA）振幅垂直位较水平位显著降低。在0.200 Hz时，虽然出现了一些下降趋势，但未获得显著下降。垂直位时，低频（0.083，0.100Hz）振幅显著增加（p lt 0.01）。这种姿势对低频RSA的影响与对反映交感神经活动的Mayer波相关性窦性心律失常（MWSA）的影响相似。0.100Hz和0.250Hz的振幅比值与平均心率呈显著正相关（n=56，r=0.73）。根据这些结果，假设在低频的RSA幅度不仅与副交感神经而且与交感神经相关联，而在高频的幅度仅由副交感神经介导。
Heart rate variations during steady state respiration with various frequencies were studied on seven healthy male students at two different body positions. Respiration was controlled at four different frequencies (0.083, 0.100, 0.200, 0.250Hz), and the tidal volume was simultaneously controlled at 1500ml (0.083, 0.100Hz) or 1000ml (0.200, 0.250Hz). A tilting bed was used for changing body position, and the measurements were conducted at horizontal and vertical position. RSA (respiratory sinus arrhythmia) amplitude at 0.250Hz was significantly decreased at vertical position compared with horizontal position. At 0.200Hz the significant decrease could not be obtained although some tendency of decrease appeared. Contrary to these high frequencies, the amplitudes at low frequencies (0.083, 0.100Hz) were significantly increased (p lt 0.01) during vertical position. This postural effect on the low frequency RSA could be regarded as a similar result on MWSA (Mayer wave relate sinus arrhythmia) which reflects sympathetic nervous activity. Furthermore, the ratio between the amplitude at 0.100Hz and that at 0.250Hz was significantly correlated with mean heart rate (n=56, r=0.73). From these results it was assumed that the RSA amplitude at low frequency associate a with not only parasympathetic nerves but also sympathetic nerves whereas the amplitude at high frequency was solely mediated by parasympathetic nerves.