题目内容
大型室间隔缺损出现青紫时，后期肺血管的改变是
2021-11-19
A.肺血管扩张
B.肺小动脉痉挛产生动力型肺动脉高压
C.肺小动脉中层和内膜层增厚形成梗阻型肺动脉髙压
D.侧支循环形成
E.肺循环血量增多
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