Demonstration of retrograde conduction over an atriofascicular accessory pathway.
BACKGROUND
Absence of retrograde conduction over a right atriofascicular accessory pathway causing reciprocating tachycardia has been considered a hallmark of this clinical entity.


RESULTS
This report describes successful catheter ablation in a patient presenting with the distinctive pattern of preexcited left bundle branch block tachycardia utilizing a right atriofascicular accessory pathway. This pathway, however, exhibited the unique capability of ventriculoatrial conduction. Both anterograde and retrograde conduction were characterized by "node-like" properties.


CONCLUSIONS
Demonstration of retrograde accessory pathway conduction in this particular setting does not exclude the diagnosis of a single, atriofascicular accessory pathway.
Kreiner
G
G
Department of Cardiology, University of Vienna, Austria.
Heinz
G
G
Frey
B
B
Gössinger
H D
HD
D000328:Adult; D017115:Catheter Ablation; D004562:Electrocardiography; D005260:Female; D006329:Heart Conduction System / Q000503:physiopathology*; D006801:Humans; D013610:Tachycardia / Q000503:physiopathology* / Q000601:surgery