title: [Radiofrequency ablation of accessory pathways in the presence of atrial fibrillation].
abstract: Radiofrequency catheter ablation was performed in 595 consecutive patients with Wolff-Parkinson-White syndrome. We attempted ablation of right and left accessory pathways, during sustained atrial fibrillation with rapid anterograde conduction over the accessory pathway in three patients. In other patient, who had an accessory pathway with anterograde decremental conduction properties, referred to as Mahaim atriofascicular fiber, originating from the right posterolateral atrium, who also had sustained atrial fibrillation during the electrophysiological study to assess accessory pathway conduction properties, was also submitted to ablation of the accessory pathway. At the successful ablation sites, a ventricular electrogram was consistently recorded preceding the onset of preexcitation, in the surface electrogram by 20 ms, during atrial fibrillation. All patients were successfully ablated with a single radiofrequency impulse. After successful ablation direct current cardioversion with 200 joules terminated the atrial fibrillation. In conclusion, radiofrequency catheter ablation of accessory pathways during sustained atrial fibrillation is feasible with a high success rate.
authors.affiliation: Departamento de Electrofisiología, Instituto Nacional de Cardiología Ignacio Chávez, Tlalpan, México, D.F.
authors.forename: P I
authors.initials: PI
authors.lastname: Iturraide Torres
authors.forename: S
authors.initials: S
authors.lastname: Kershenovich
authors.forename: L
authors.initials: L
authors.lastname: Colín Lizalde
authors.forename: F
authors.initials: F
authors.lastname: Cruz Cruz
authors.forename: H
authors.initials: H
authors.lastname: Rodríguez Reyes
authors.forename: A
authors.initials: A
authors.lastname: de Micheli
authors.forename: J A
authors.initials: JA
authors.lastname: González Hermosillo
mesh_terms: D000328:Adult; D017115:Catheter Ablation / Q000379:methods*; D004562:Electrocardiography; D005260:Female; D006329:Heart Conduction System / Q000002:abnormalities* / Q000503:physiopathology / Q000601:surgery*; D006801:Humans; D008297:Male; D008875:Middle Aged; D014693:Ventricular Fibrillation / Q000503:physiopathology / Q000601:surgery*; D014927:Wolff-Parkinson-White Syndrome / Q000150:complications
vernacular_title: Ablación con radiofrecuencia de vías accesorias en presencia de fibrilación auricular.