Abstract 2883: Recurrence of Atrial Fibrillation after Efficacious Radiofrequency Transcatheter Ablation of Regular Supraventricular Tachycardia. Long-Term Follow-Up
Radiofrequency transcatheter ablation (RFTCA) of the focal AF has a success rate of no more than 88%, even with associated antiarrhythmic treatment, and with an early recurring rate as high as 35%. Among the triggers, regular supraventricular tachycardia (SVT) such as atrioventricular re-entry nodal tachycardia (AVRNT) and atrioventricular re-entry tachycardia (AVRT), atrial flutter (AFL), atrial tachycardia (AT) have been reported.
Aim: To verify the usefulness and the safety RFTCA of regular SVT in a selected study group with associated episodes of AF paroxistical or persistent, as well as the recurrence of AF after efficacious RFTCA.
Methods: The study population is represented by 189 patients of whom 109 males with an average age of 54+20 years who underwent electrophysiological studies (ES) and RFTCA for regular SVT with associated episodes of AF (AVRNT/AF 91/12, AVRT/AF 28/3, AFL/AF 68/22, AT/AF 4/1) and with an pre-RFTCA average recurrence of paroxistic AF of 5+6 episodes per year. All the patients filled in the questionnaire on the quality of life (SF-36), had echocardiograms and underwent ES and RFTCA.
Results: Out of the total of RFTCA procedure for regular SVT with associated AF, a complete success was obtained at the first procedure in all patients. Clinical follow-ups were programmed at 1, 3, 6 and 12 months and telephone follow-ups at 16 and 24 months. At the follow-up of 20+6 months no recurrence of AVNRT and AT was verified, three recurrences of AFL and one of TRAV, and no recurrence of AF was documented.
Conclusion: the RFTCA for regular SVT has shown itself to be a safe procedure with good long-term results. The absence of a recurrence of AF, even during the limited observation and study periods in this selected population, can most likely be attributed to the elimination of the trigger represented by regular SVT.