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当前学科:北京住院医师公共卫生学(综合练习)
题目:
单选
某患者行心电图检查时发现PR间期延长,下列判断哪一项是正确的()
A . 心肌收缩无力
B . 房室传导阻滞
C . 束支传导有障碍
D . 房室瓣关闭不全
E . 主动脉瓣狭窄
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