Fetal heart rate nadir during bradycardia and umbilical artery acidemia at birth

Introduction Fetal bradycardia due to sentinel events such as placental abruption, cord prolapse or uterine rupture is associated with an increased risk of acidemia at birth. In the absence a event, data regarding neonatal prognosis are scarce, and it seems plausible that depth might be acidosis The objective was determine whether higher umbilical artery birth in term singleton pregnancies requiring cesarean delivery during labor. Material methods A retrospective comparative study all deliveries for academic tertiary center 6-year period 2013-2018, among pregnancies. Bradycardia event rupture, were excluded. nadir defined lowest fetal heart rate baseline lasting least 3 minutes bradycardia. Women who delivered infant pH <7.00 (acidosis group) compared women ≥7.00 (non-acidosis group). Results Among 111 eligible cases, 32 group 79 non-acidosis group. median lower than (60 bpm, interquartile range [56-65] vs 70 [60-76], P < .01). <60 bpm emerged optimal threshold predicting more frequently observed (10 [31%] 10 [13%], = .02). multivariable analysis, independently (adjusted OR 3.16, 95% CI 1.10-9.04). Conclusions tripled