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Case Reports
. 1997 Feb;77(2):180-2.
doi: 10.1136/hrt.77.2.180.

Mechanism of QRS electrical alternans

B Brembilla-Perrot  1 , H Lucron, F Schwalm, A Haouzi
Affiliations
Case Reports

Mechanism of QRS electrical alternans

B Brembilla-Perrot et al. Heart. 1997 Feb.

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.

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