正常成人二尖瓣口面积为A.2~3cmB.3~4cmC.4~5cmD.5~6cmE.6~7cm

作者: rantiku 人气: - 评论: 0
问题 正常成人二尖瓣口面积为
选项 A.2~3cm B.3~4cm C.4~5cm D.5~6cm E.6~7cm
答案 C
解析 :二尖瓣口面积在2.5cm以上一般并无症状,当小于2.5cm时可出现气促咳嗽咯血,此外还有心悸、心前区闷痛等。

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