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- W3000000554 abstract "Background Atrioventricular (AV) node duality is suggested by several electrophysiological findings, none of which are strong predictors of AV nodal reentrant tachycardia (AVNRT). Objective The purpose of this study was to propose a novel maneuver to study conduction over the AV node and attempt to induce slow-fast AVNRT. Methods Ventricular-triggered atrial pacing (VTAP) with decremental VA delay was carried out in 36 consecutive patients with slow-fast AVNRT and in 21 controls after conventional electrophysiology study. Maneuvers were repeated after ablation in patients with AVNRT. Results VTAP resulted in a hysteretic conduction curve in 21 of 36 patients (58%) in the AVNRT group but only 4 of 21 patients (19%) in the control group (sensitivity 58; specificity 81%). This finding demonstrates sustained conduction in a slow conducting pathway and concealed retrograde conduction over a fast pathway. VTAP resulted in AVNRT induction in 15 of 25 inducible patients at baseline (60%), 4 of which were not inducible with incremental pacing or programmed atrial stimulation. VTAP resulting in a suspended p wave had 51% (39%–64%) sensitivity and 100% (89%–100%) specificity for predicting noninducibility in a given autonomic state. Conclusion VTAP is useful in patients with suspected slow-fast AVNRT. A hysteretic conduction curve demonstrates sustained conduction over a slow pathway and concealed retrograde conduction through the fast pathway, a finding in favor of slow-fast AVNRT. VTAP may facilitate AVNRT induction and proves to be an interesting complement to classic maneuvers. A suspended p-wave response specifically predicts noninducibility of slow-fast AVNRT in a given autonomic state, providing an interesting surrogate to noninducibility as a procedural end point." @default.
- W3000000554 created "2020-01-23" @default.
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- W3000000554 date "2020-06-01" @default.
- W3000000554 modified "2023-10-16" @default.
- W3000000554 title "Ventricular-triggered atrial pacing: A new maneuver for slow-fast atrioventricular nodal reentrant tachycardia" @default.
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- W3000000554 doi "https://doi.org/10.1016/j.hrthm.2020.01.011" @default.
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