题目内容
一度房室传导阻滞时的心电图改变是
2021-10-28
A.QRS增宽大于0.12s
B.P-R间期大于0.12s
C.P-R间期小于0.21s
D.P-R间期大于等于0.21s
E.P-R间期逐渐延长
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