Introduction: A baseline fetal heart rate between 110 and 160 bpm is considered normal. However, among normal fetuses the average baseline heart rate has been shown to diminish progressively and the 90th centile of the fetal heart rate at 40 weeks of gestation has been consistently found at ...
心脏作为心血管系统的动力器官，其主要生理功能是收缩射血，推动全身的血液循环，以适应劳动、运动等不同体力活动和其他生命活动的需要。通常情况下，心脏功能的强弱主要反映在心输出量（cardiacoutput,CO）的大小，后者是每搏输出量（strokevolume,SV）和每分钟心率（heartrate,HR）的乘积。运动生理学研究证明，...
fetal heart rateneonatal acidosisIntroduction A baseline fetal heart rate between 110 and 160 bpm is considered normal. However, among normal fetuses the average baseline heart rate has been shown to diminish progressively and the 90th centile of the fetal heart rate at 40 weeks of gestation has...