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胎儿能产生心房利钠肽,简称心钠素(ANP)。影响胎儿血肉ANP含量的因素可能也包括右房压、心率、类固醇激素、加压素以及麻醉镇痛药和拟交感药等。胎儿分泌ANP生理学意义尚未阐明,但可能对调节胎儿—胎盘血流动力学起作用。曾报道择期腰麻下剖宫产给产妇麻黄碱的剂量与产后脐动脉血ANP水平呈正相关。因此设想麻黄碱透过胎盘,通过兴奋β受体使心率加快,从而导致ANP释放。麻黄碱属α和β受体混
Fetal can produce atrial natriuretic peptide, referred to as atrial natriuretic peptide (ANP). Factors affecting fetal FFA ANP levels may also include right atrial pressure, heart rate, steroid hormones, vasopressin and narcotic analgesics and sympathomimetics. The physiological significance of fetal secretion of ANP has not been elucidated but may play a role in the regulation of fetal-placental hemodynamics. Elective cesarean section has been reported under cesarean delivery of ephedrine dose and postpartum umbilical artery blood ANP level was positively correlated. It is therefore envisaged that ephedrine penetrates the placenta and accelerates the heart rate by stimulating the beta receptor, resulting in the release of ANP. Ephedrine α and β receptor mixed