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Updated: Aug 8, 2026

Remote Magnetic Navigation for Accurate, Real-time Catheter Positioning and Ablation in Cardiac Electrophysiology Procedures
Published on: April 21, 2013
[Relationship between conduction persistence through the slow pathway after atrioventricular nodal reentry
M A Silva1, M I Scanavacca, A D'Avila
1Instituto do Coração do Hospital das Clínicas da FMUSP.
Purpose:
The aim of this study is to verify whether the persistence of conduction over the slow pathway is related to an increased trend for recurrence.
Methods:
Recurrence rate was retrospectively analyzed in 126 patients who underwent slow pathway radiofrequency (RF) catheter ablation during a follow-up of 20 +/- 12 months. The ablative procedure was interrupted when AVNRT was no longer induced by atrial stimulation after intravenous infusion of isoproterenol. Ninety-eight patients had no evidence of slow pathway whereas 28 patients persisted with AV node jump and atrial echo beat.
Results:
There were 15 recurrences: 9% of those who had no evidence of slow pathway (9 of 98 patients) and 21% of those with AV node jump and/or atrial echo beat but this difference was not statistically significant.
Conclusion:
As long as AVNRT cannot be induced by atrial pacing and isoproterenol infusion after slow pathway RF catheter ablation, the presence of AV node jump and/or atrial echo beat does not increase the risk of recurrence of AVNRT.
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