Rafla N M, Cook J R
Department of Obstetrics and Gynaecology, Kent & Canterbury Hospital, UK.
J Obstet Gynaecol. 1999 Jul;19(4):381-4. doi: 10.1080/01443619964698.
One hundred and ninety-three women with uncomplicated pregnancies and 44 with high-risk pregnancies participated in a 5-minute exercise stress test on a bicycle ergometer. All women were in the third trimester of pregnancy. Measurements of fetal heart rate were made at intervals of 2, 4, 6, 8, 10, 12, 16, 20, 25 and 30 minutes. Fetal heart rate was then compared in terms of maternal age, parity, consumption of cigarettes, exercise intensity, history of activity, cardiotocography score, maternal heart rate at rest, maternal heart rate after exercise, fetal sex and birth weight. In low-risk pregnancies an increase in fetal heart rate from 143 (124-171) beats per minute (bpm) to 148 (116-191) bpm was noted after exercise while, in the high-risk pregnancy group, a transient decrease from 148 (115-170) bpm to 141 (70-180) bpm was observed. There were also 10 cases of significant bradycardia in the high-risk pregnancy group. We conclude that the effect of maternal exercise on fetal heart rate is dependent on many variables. A fetal bradycardia following exercise is more likely to occur in high-risk pregnancies. The use of fetal heart rate variation with exercise could be a useful prognostic factor in pregnancy.
193名无并发症妊娠的女性和44名高危妊娠的女性参与了一项在自行车测力计上进行的5分钟运动应激试验。所有女性均处于妊娠晚期。在2、4、6、8、10、12、16、20、25和30分钟的间隔时间测量胎儿心率。然后根据产妇年龄、产次、吸烟情况、运动强度、活动史、胎心监护评分、产妇静息心率、运动后产妇心率、胎儿性别和出生体重对胎儿心率进行比较。在低风险妊娠中，运动后胎儿心率从每分钟143（124 - 171）次心跳（bpm）增加到148（116 - 191）bpm，而在高危妊娠组中，观察到从148（115 - 170）bpm短暂下降到141（70 - 180）bpm。高危妊娠组中也有10例显著心动过缓。我们得出结论，产妇运动对胎儿心率的影响取决于许多变量。运动后胎儿心动过缓更可能发生在高危妊娠中。运动时胎儿心率变化的应用可能是妊娠中的一个有用的预后因素。
