DeHaan R, Patrick J, Chess G F, Jaco N T
Am J Obstet Gynecol. 1977 Apr 1;127(7):753-8. doi: 10.1016/0002-9378(77)90251-4.
The relationship of heart rate variability to sleep state was examined in 9 term newborn infants at one to three days of age. Spectral density plots of rhythmic variations in heart rate during active sleep and quiet sleep were characteristic and always distinct from each other. Heart rate and heart rate variability were significantly higher during active sleep than during quiet sleep. It was always possible to identify quiet sleep and active sleep during sleep periods by inspecting spectral density plots of the variations in heart rate. Similar relationships between heart rate variability and sleep states may exist in utero. Spectral analysis of heart rate variations may provide an indirect measurement of fetal sleep states, and such measurements might become useful in assessing fetal brain maturity and fetal well-being.
在9名足月新生儿出生1至3天时，研究了心率变异性与睡眠状态的关系。在活跃睡眠和安静睡眠期间，心率节律变化的频谱密度图具有特征性，且彼此始终不同。活跃睡眠期间的心率和心率变异性显著高于安静睡眠期间。通过检查心率变化的频谱密度图，总是能够在睡眠期间识别出安静睡眠和活跃睡眠。在子宫内可能也存在心率变异性与睡眠状态之间的类似关系。心率变化的频谱分析可能提供胎儿睡眠状态的间接测量方法，并且这种测量方法可能有助于评估胎儿大脑成熟度和胎儿健康状况。
