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外周化学感受器活动对心率变异性的影响
The influence of peripheral chemoreceptors activities on heart
【摘要】 采用给健康、麻醉的豚鼠吸入纯氮气 (N2 )和纯氧气 (O2 )的方法 ,以兴奋或抑制外周化学感受器 ,观察外周化学感受器兴奋对心率变异性的影响 .吸入N2 引起TV、VLF、VLF/HF和LF/HF比值显著增加 ( p <0 0 5～ 0 0 0 1 ) .吸入纯氧后VLF和LF显著减少 ( p <0 0 5 ) .实验表明 :VLF随外周化学感受器的不同活动状态而改变 ,外周化学感受器兴奋对VLF的形成起了重要作用
【Abstract】 The effect of excitation or inhibition of peripheral chemoreceptors on HRV were investigated by means of inhalation of pure N 2 and pure O 2 in anaesthetized guinea-pigs.Results show:to breath in pure N 2 significantly increased TV,VLF,VLF/HF and LF/HF(p<0.05～0.001),but VLF and LF were decreased (p<0.05)while breath in pure O 2.Conclusion:These results suggest that VLF power changes in dependence on peripheral chemoreceptor activties.The peripheral chemoreceptor activities play an important role in VLF origin.
【Key words】 peripheral chemoreceptors； heart rate variability(HRV)； very low frequency(VLF)；
- 【文献出处】 沈阳师范学院学报(自然科学版) ,Journal of Shenyang Normal University(Natural Science) , 编辑部邮箱 ,2002年02期
- 【分类号】R540.2
- 【下载频次】68