患者男性,38岁,因晕厥就诊。心电图如下图所示,应诊断为A.三度房室传导阻滞,室性逸搏心律B.三度房室传导阻滞,交界性逸搏心律C.高度房室传导...

作者: rantiku 人气: - 评论: 0
问题 患者男性,38岁,因晕厥就诊。心电图如下图所示,应诊断为
选项 A.三度房室传导阻滞,室性逸搏心律 B.三度房室传导阻滞,交界性逸搏心律 C.高度房室传导阻滞,左束支阻滞 D.室性逸搏心律 E.高度房室传导阻滞,室性逸搏
答案 C
解析 :心电图显示窦性心律,心房率约115次/分,PP间距规则,PR间期为0.16s。每4个窦性P波中仅一个下传到心室,形成规则的4:1房室传导。QRS波群增宽,时限达0.14s,I、Ⅱ导联R波有明显切迹,为左束支阻滞,提示阻滞部位在束支水平。

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