QRS电交替的机制。
Mechanism of QRS electrical alternans.
作者信息
Brembilla-Perrot B, Lucron H, Schwalm F, Haouzi A
机构信息
Cardiology A, University Hospital of Brabois, Vandoeuvre, France.
出版信息
Heart. 1997 Feb;77(2):180-2. doi: 10.1136/hrt.77.2.180.
Abstract
In patients with latent dual atrioventricular nodal pathways a 2:1 ventriculoatrial block often occurs during ventricular pacing and is generally associated with the concomitant appearance of QRS alternans. This type of QRS alternans is related to retrograde conduction, and a concealed retrograde conduction in the His Purkinje system could explain the QRS alternans. A case that confirms the hypothesis that electrical alternans is secondary to a 2:1 block in the activation of some part of the ventricles is reported.
摘要
在潜在双房室结径路患者中，心室起搏时常出现2∶1室房阻滞，且通常伴有QRS波交替现象。这种类型的QRS波交替与逆行传导有关，希氏-浦肯野系统中的隐匿性逆行传导可解释QRS波交替现象。本文报告1例病例，证实了电交替是心室某部分激动过程中2∶1阻滞所致这一假说。
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