30時間断眠による呼吸生不整脈振幅の変化

抄録

Heart rate variations of six males and six females during total sleep deprivation were examined. The respiratory sinus arrhythmia (RSA) during steady-state respirations where the tidal volume and frequency of the respirations were controlled at either 1500ml / 0.10Hz or 1000ml / 0.25Hz. The RSA approach was compared with conventional HRV spectral analysis. The mean heart rate decreased significantly during the period of sleep deprivation in both male and female subjects. The RSA amplitudes in male subjects significantly decreased during the period of sleep deprivation under both respiratory conditions. However, the significant decreases were not observed in female subjects although a decrease was observed. A correlation coefficient between the mean heart rate and RSA (0.1Hz) / RSA (0.25Hz) ratio decreased during sleep deprivation. Although a similar decrease was observed on the HRV spectral components, the difference between control and sleep deprivatiedon was not as clear as the results of RSA amplitudes. Therefore the results that the RSA measurement furnished a higher accuracy in the estimation of autonomic activities compare with the approach of conventional HRV spectral analysis.