Radiofrequency ablation of atrioventricular accessory pathways associated with discordant atrioventricular connections
Discordant atrioventricular connections associated with Wolff-Parkinson-White syndrome increase the challenge of radiofrequency ablation. We report the results and techniques of radiofrequency ablation in three patients with discordant atrioventricular connections, including one patient having double outlet right ventricle with atrioventricular reentry tachycardias. There were two males and one female, aged 14 and 22 years old. We found four accessory pathways during our electrophysiological studies, with two of them manifest on the electrocardiogram, corresponding to left paraseptal and right midseptal regions. The electrophysiological study confirmed this localization, and showed two concealed accessory pathways in the right and left paraseptal regions. Radiofrequency ablation was successful in all cases without recurrence at a mean follow-up of 18.6 months. No complications were observed during the procedures. We conclude that radiofrequency ablation is feasible and effective in the ablation of accessory pathways in patients with discordant atrioventricular connections.(Published Online August 15 2006)
(Accepted July 31 2002)
Key Words: Wolff-Parkinson-Whitesyndrome; congenitally corrected transposition; catheter intervention.
c1 Correspondence to: Pedro Iturralde Torres, Departamento de Electrofisiología, Instituto Nacional de Cardiología “Ignacio Chávez”, Juan Badiano 1, Sección XVI, 14080, Tlalpan, D.F. México. Tel: 52 5513 3740; Fax: 52 5573 0994; E-mail: firstname.lastname@example.org