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- W2097583306 endingPage "R1552" @default.
- W2097583306 startingPage "R1541" @default.
- W2097583306 abstract "The ability of the fetus to survive, grow, and successfully complete the transition from fetal to neonatal life is critically dependent on the appropriate regulation of fetal blood pressure, blood volume, and fluid dynamics. This is a short review of the physiological mechanisms controlling the fetal cardiovascular system, focusing mainly on the neural and endocrine elements in the schema of cardiovascular function and control. The fetal cardiovascular system is arranged anatomically to provide for perfusion of the umbilical-placental circulation, the organ of gas exchange of the fetus, and to largely bypass the lungs. Fetal blood volume and pressure, maintained at levels that are appropriate for this function, are influenced by neural and endocrine control mechanisms, which are similar to, but quantitatively different from, the adult animal. Baroreceptors and chemoreceptors located in the carotid sinuses and aortic arch sense changes in blood pressure and blood gases and comprise the afferent limb of the major reflexes that maintain normal fetal blood pressure and volume. Fetal hypotension stimulates reflex decreases in fetal heart rate, which are apparently mediated by chemoreceptor input. Arginine vasopressin responses to hypotension are most likely mediated by baroreceptor input. Recent evidence suggests that the reflex responses to hypotension in the fetus are modulated by paracrine or endocrine factors. For example, baroreceptor or chemoreceptor reflex pathways are modulated by the endogenous production of prostanoids and by the preparturient changes in fetal plasma estrogen concentration." @default.
- W2097583306 created "2016-06-24" @default.
- W2097583306 creator A5065268260 @default.
- W2097583306 creator A5073300390 @default.
- W2097583306 date "1999-12-01" @default.
- W2097583306 modified "2023-10-06" @default.
- W2097583306 title "Central nervous system regulation of reflex responses to hypotension during fetal life" @default.
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- W2097583306 doi "https://doi.org/10.1152/ajpregu.1999.277.6.r1541" @default.
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