Variability of the VA interval at tachycardia induction: a simple method to differentiate orthodromic reciprocating tachycardia from atypical atrioventricular nodal reentrant tachycardia.

Claudio Hadid Leonardo Celano Darío Di Toro Edgar Antezana-ChavezSebastián GallinoGustavo Iralde David Calvo Pablo ÁvilaLeonardo AteaSergio GonzalezSebastián MaldonadoCarlos Labadet

Published in: Journal of interventional cardiac electrophysiology : an international journal of arrhythmias and pacing (2022)

A ∆VA < 10 ms is a simple and useful criterion that accurately distinguished AVRT from atypical AVNRT. Central panel: Scatter plot showing individual values of ∆VA in atypical AVNRT and AVRT. Left panel: induction of atypical AVNRT. The VA interval stabilizes at the 5th beat and the ∆VA is 62 ms (maximum VA interval: 172 ms - minimum VA interval: 110 ms). Right panel: induction of AVRT. The tachycardia has a fixed VA interval from the first beat. ∆VA is 0 ms.

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