题目内容
二尖瓣狭窄的超声特征是
2021-09-17
A.EF斜率加快，前后瓣同向运动
B.EF斜率减慢，前后瓣异向运动
C.EF斜率减慢，前后瓣同向运动
D.二尖瓣DE振幅增高，EF斜率加快
E.无特异征象
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