【摘 要】
：
Physiology and PathophysiologyFetal life Ductus open R→L shuntPostnatal Transitional Period Ductus opening R←→L shunt Bidirectional shuntRegulation of Ductus Patency in Fetal Life Dilating factors: In
【机 构】
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College of Medicine University of (Ⅲ.)Chicago
【出 处】
：
庆祝中国当代儿科杂志创刊15周年大会暨当代儿科论坛
论文部分内容阅读
Physiology and PathophysiologyFetal life Ductus open R→L shuntPostnatal Transitional Period Ductus opening R←→L shunt Bidirectional shuntRegulation of Ductus Patency in Fetal Life Dilating factors: Increasing vascular pressure within the ductus, opposing ductus constriction Vasodilators—circulating PGE2., PGs and Nitric Oxide (NO) from ductus, CO from endothelial and muscle cell of the ductus.Contracting Factors Extracellular Calcium Endothelin-1
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