The QRS complex, during tachycardia could be in morphology of narrow, left bundle branch block (LBBB) and right bundle branch block(RBBB) with VA dissociation.
心动过速可呈窄QRS图形、左束支传导阻滞（LBBB）图形及右束支传导阻滞（RBBB）图形。
Conclusions the IVF with RBBB and st segment elevation is a distinct syndrome, and the mutations in the cardiac sodium channel gene SCN 5 a are associated with IVF.
结论我们的工作显示了伴有rbbb和ST段抬高的IVF是一种明显的综合征，并且心脏钠通道基因scn5A与IVF的发生密切相关。
Conclusions the IVF with RBBB and st segment elevation is a distinct syndrome, and the mutations in the cardiac sodium channel gene SCN 5 a are associated with IVF.
结论我们的工作显示了伴有rbbb和ST段抬高的IVF是一种明显的综合征，并且心脏钠通道基因scn5A与IVF的发生密切相关。
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