Dual AV nodal pathway physiology after injury with radiofrequency energy in a patient without a history of reentrant tachycardia

Radiofrequency (RF) atrioventricular (A V) nodal modification has been repo rted fo occasionally produce a proarrhythmic effect. Dual AV nodal pathway physiology in patients without reentrant tachychardia has also been reporte d. This case describes AV nodal modification with RF energy in an anatomica lly intermediate area resulting in the appearance op discontinuous antegrad e conduction curves and reentry in a patient in which these were previously not present. This suggests that AV nodal injury may be a mechanism for acq uired AV nodal reentry.