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Nonlinear interaction of voluntary breathing and cardiovascular regulation
1Department of Mechanics and Engineering, Science of Fudan University, Shanghai, 200032 P.R. China (phone: +86-21-54237273;
Abstract:
To investigate the effects of voluntary breathing on respiratory sinus arrhythmia and nonlinearity of heart rate variability (HRV), two kinds of voluntary breathing, speech and breath-holding, were used. The results showed that both types of voluntary breathing diminished the high frequency component of HRV, but speech decreased, while breath-holding enhanced the nonlinearity of HRV as detected by the Volterra series method. This finding indicates that respiratory patterns have a variety of influences on cardiovascular regulation.
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