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Cui Hong

First Clinical Institute，China Medical University. Shenyang 110001,Liaoning, China

Abstract

Experiments were performed on 15 Sprague-Dawley rats to detect the effect of artificial ventilation of different frequencies on the high frequency component of heart rate variability(HRV) by autoregressive modeling with Burg algorithm. With continuous or intermittent electrical stimulation, different patterns of regulating activity of nucleus ambiguus in medulla on HRV were observed. Fast Fourier transform was used to analyze the coherence between neuronal discharge with respiratory rhythm in rosral ventrolateral medulla (rVLM) and HRV. The results showed that (1) the central frequence of high frequency (HF) component of HRV were moved closely with frequencies of artificial ventilation, (r = 0.83, P < 0.0001); (2) there was a favorable coherence between neuronal discharge with respiratory rhythm in rVLM and HRV in HF on spectrum, (k2 =0.854±0. 1); (3) the area of HF component in HRV was increased significantly during intermittent electrical stimulation of nucleus ambiguus in medulla.

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Citing This Article：

Cui Hong. . Acta Physiol Sin 1998; 50 (4): (in Chinese with English abstract).