典型的二度Ⅰ型房室阻滞符合下列哪种情况A.心室率少于50次/分B.QRS波群有脱落C.PR逐次延长、RR逐次缩短D.QT间期异常E.QRS...

作者: rantiku 人气: - 评论: 0
问题 典型的二度Ⅰ型房室阻滞符合下列哪种情况
选项 A.心室率少于50次/分 B.QRS波群有脱落 C.PR逐次延长、RR逐次缩短 D.QT间期异常 E.QRS波群增宽
答案 BC
解析 :Ⅱ度房室阻滞莫氏Ⅰ型(及文氏型)表现为P-R间期逐渐延长,R-R间期逐渐缩短,直到QRS波群脱落,每出现一次QRS波群脱落为一个文氏周期。
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