Radiofrequency ablation of the slow pathway abolished tachycardia with no recurrence at 3-month follow-up in a patient with repaired Tetralogy of Fallot.
Case Report (n=1)
No
Invasive electrophysiology study with careful His bundle mapping can accurately diagnose rare 2-for-1 AV nodal conduction, which can be effectively treated with slow pathway ablation even in patients with repaired congenital heart disease.
2-for-1 atrio-ventricular (AV) nodal conduction, also known as Dual AV nodal Non-Reentrant Tachycardia (DAVNNT) or Double Ventricular Response Tachycardia (DVR), is an uncommon arrhythmia in which a single atrial impulse conducts simultaneously via both fast and slow AV nodal pathways, producing two ventricular activations 1. Misdiagnosis is frequent because of its variable surface ECG appearance2. We report a case of 2-for-1 tachycardia in a patient with repaired TOF, highlighting diagnostic maneuvers and successful ablation.
Nallathambi et al. (2026) führten einen Fallbericht über supraventrikuläre Tachykardie aufgrund einer 2-zu-1 atrioventrikulären Knotenkonduktion bei einem Patienten mit reparierter Tetralogie von Fallot (n=1) durch. Die Radiofrequenzablation des langsamen Weges wurde anhand der Eliminierung der Tachykardie und des Wiederauftretens von Symptomen bewertet. Die Radiofrequenzablation des langsamen Weges beseitigte die Tachykardie ohne Wiederauftreten bei der 3-monatigen Nachuntersuchung bei einem Patienten mit reparierter Tetralogie von Fallot.
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