Ohno Y, Tsuji M, Tomioka M, Yamamoto T, Okada H
Nihon Sanka Fujinka Gakkai Zasshi. 1985 Jan;37(1):53-60.
Fetal heart rate monitoring was carried out on 37 patients between 34 and 42 weeks gestation, in 21 patients with direct fetal electrocardiogram (dFECG), and in 16 patients with abdominal fetal electrocardiogram (aFECG). The mean of the absolute beat by beat differences (MABB) and the percentage of beat by beat differences below 1 millisecond (1 msec%) and below 2 milliseconds (2 msec%) were measured from true fetal R-R intervals by a computerized technique. With dFECG, a significant inverse correlation was found between the MABB and the 1 msec% or the 2 msec%. The standard deviation of fetal R-R intervals as the LTV index showed a higher correlation to the MABB than to the 1 msec% or the 2 msec%. These results were similar to those with aFECG. In addition, with aFECG, the effect of fetal rest and activity on the MABB was significant, but the 1 msec% and the 2 msec% were not altered with periods of fetal rest and activity. The influence of the artifact in aFECG signals on the 1 msec% and the 2 msec% was less than on the MABB. The 1 msec% and the 2 msec% were reliable indices of the STV assessment from aFECG.
对37例孕34至42周的患者进行了胎儿心率监测，其中21例采用直接胎儿心电图（dFECG），16例采用腹部胎儿心电图（aFECG）。通过计算机技术从真实胎儿R-R间期测量逐搏绝对差值的平均值（MABB）以及低于1毫秒（1 msec%）和低于2毫秒（2 msec%）的逐搏差值百分比。对于dFECG，发现MABB与1 msec%或2 msec%之间存在显著的负相关。作为LTV指数的胎儿R-R间期标准差与MABB的相关性高于与1 msec%或2 msec%的相关性。这些结果与aFECG的结果相似。此外，对于aFECG，胎儿休息和活动对MABB的影响显著，但1 msec%和2 msec%在胎儿休息和活动期间没有改变。aFECG信号中的伪迹对1 msec%和2 msec%的影响小于对MABB的影响。1 msec%和2 msec%是aFECG评估STV的可靠指标。
