Demonstration of retrograde conduction over an atriofascicular accessory pathway

Atriofascicular Pathway with Retrograde Conduction, Introduction: Absence of retrograde conduction over a right atriofascicular accessory pathway causing reciprocating tachycardia has been considered a hallmark of this clinical entity, Methods and Results: This report describes successful catheter ablation in a patient presenting with the distinctive pattern of preexcited left bundle branch block tachycardia utilizing a fight atriofascicular accessory pathway, This pathway, however, exhibited the unique capability of ventriculoatrial conduction, Both anterograde and retrograde conduction were characterized by ''node-like'' properties, Conclusion: Demonstration of retrograde accessory pathway conduction in this particular setting does not exclude the diagnosis of a single, atriofascicular accessory pathway.