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shuang san pian shu gen zhi dong mai dao guan wei bi
Author(s): 
Pages: 25
Year: Issue:  4
Journal: Health World

Keyword:  动脉导管未闭先天性心脏病胎儿期肺动脉高压动脉管主动脉弓心力衰竭动脉韧带血液循环出生后;
Abstract: <正> 动脉导管未闭是一种常见的先天性心脏病。动脉导管是胎儿期连接肺动脉和主动脉的一条重要的动脉管道,从胎儿时的第六主动脉弓背部发育而来,是胎儿期血液循环的重要生理血液通道,出生后应很快自行关闭(大多在出生后3个月内完全关闭,极少数可迁延到一年后关闭)。并逐渐退化为动脉韧带。如在某种病理情况下,导管不能及时关闭,则成为病理性动脉导管未闭。未闭导管粗大者可发生肺动脉高压和心力衰竭,
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