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可引起第二心音A增强的是()

单选题
2022-07-11 16:27
A、动脉粥样硬化
B、主动脉瓣狭窄
C、主动脉瓣关闭不全
D、肺动脉高压
E、左心功能不全
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正确答案
A

试题解析
第二心音强度与循环阻力的大小、血压的高低和半月瓣的解剖改变相关,体循环阻力高或血流量增多时S增强。

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