Wax J R, Emmerich M, Eggleston M K
Department of Obstetrics and Gynecology, Naval Medical Center, Portsmouth, Virginia, USA.
Am J Obstet Gynecol. 1996 May;174(5):1649-50. doi: 10.1016/s0002-9378(96)70624-5.
Concern for fetal hypoxia often leads to cesarean delivery when persistent fetal bradycardia is identified. A fetus with premature atrial contractions had a prolonged second-stage heart rate of 80 beats/min. Intrapartum echocardiography and electronic fetal heart rate monitoring distinguished bradycardia caused by blocked atrial bigeminy from hypoxic bradycardia. The fetal scalp stimulation test documented normal acid-base balance and normalized the ventricular rate, avoiding cesarean delivery.
当识别出持续性胎儿心动过缓时，对胎儿缺氧的担忧常常导致剖宫产。一名患有房性早搏的胎儿第二产程心率持续为80次/分钟。产时超声心动图和电子胎儿心率监测区分了由阻滞性房性二联律引起的心动过缓和缺氧性心动过缓。胎儿头皮刺激试验记录了正常的酸碱平衡并使心室率恢复正常，从而避免了剖宫产。
