The effect of ventilation on spectral analysis of heart rate and blood pressure variability during exercise

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• 作者：Bartels ; Matthew N. ; Jelic ; Sanja ; Ngai ; Pakkay ; Gates ; Gregory ; Newandee ; Douglas ; Reisman ; Stanley S. ; et. al.
• 关键词：Ventilation ; Exercise ; Heart rate variability ; Blood pressure variability ; Spectral analysis
• 刊名：Respiratory Physiology & Neurobiology
• 出版年：2004
• 出版时间：November 30, 2004
• 年：2004
• 卷：144
• 期：1
• 页码：91-98
• 全文大小：109 K

文摘

Heart rate variability (HRV) and systolic blood pressure variability (BPV) during incremental exercise at 50, 75, and 100 % of previously determined ventilatory threshold (VT) were compared to that of resting controlled breathing (CB) in 12 healthy subjects. CB was matched with exercise-associated respiratory rate, tidal volume, and end-tidal CO₂ for all stages of exercise. Power in the low frequency (LF, 0.04–0.15Hz) and high frequency (HF, >0.15–0.4Hz) for HRV and BPV were calculated, using time–frequency domain analysis, from beat-to-beat ECG and non-invasive radial artery blood pressure, respectively. During CB absolute and normalized power in the LF and HF of HRV and BPV were not significantly changed from baseline to maximal breathing. Conversely, during exercise HRV, LF and HF power significantly decreased from baseline to 100 % VT while BPV, LF and HF power significantly increased for the same period. These findings suggest that the increases in ventilation associated with incremental exercise do not significantly affect spectral analysis of cardiovascular autonomic modulation in healthy subjects.