Department of Obstetrics and Gynecology, Tohoku University Graduate School of Medicine, Sendai, Japan.
Gynecol Obstet Invest. 2012;74(1):35-40. doi: 10.1159/000336064. Epub 2012 Mar 31.
Changes in the maternal cardiac autonomic nervous system were assessed in the presence and absence of uterine contractions by analyzing maternal heart-rate variability during labor using wavelet-based power spectral analysis.
We assessed the heart-rate variability in 20 pregnant women during labor and in 15 pregnant women with threatened premature labor with the use of wavelet-based power spectral analysis.
There was no significant difference in high-frequency components between the uterine contraction and non-contraction periods. The intensities of the low-frequency and very-low-frequency components during uterine contractions were significantly stronger than the corresponding intensities between uterine contractions.
Maternal sympathetic activity was upregulated during uterine contractions, and influenced the very-low-frequency components. This method of analysis may represent a novel means of identifying uterine contractions.
通过基于小波的功率谱分析，评估分娩时子宫收缩存在和不存在时母体心脏自主神经系统的变化，分析分娩过程中的母体心率变异性。
我们使用基于小波的功率谱分析，评估了 20 名分娩孕妇和 15 名有早产先兆孕妇的心率变异性。
在子宫收缩和非收缩期间，高频分量没有显著差异。在子宫收缩期间，低频和极低频分量的强度明显强于子宫收缩之间的相应强度。
在子宫收缩期间，母体交感神经活动被上调，并影响极低频分量。这种分析方法可能代表了一种识别子宫收缩的新方法。
