Efficacy of Radiofrequency Catheter Ablation for Intraatrial Reentrant Tachycardia with Congenital Heart Disease

概要

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Background: Intraatrial reentrant tachycardia (IART) occurs frequently in patients with congenital heart disease (CHD) and is difficult to treat. Objectives: The objective of this study was to determine the success rates of radiofrequency ablation in reducing clinical arrhythmic events in patients with IART and CHD. Results: From June 2006 to March 2011, 48 consecutive patients (24 males, age [mean ± SD] 27.3±13.4 years; total 57 sessions) with 95 circuits of IART that complicated the surgery for congenital heart disease underwent ablation. The documented events of IART after surgical repair of CHD were 14.2±9.10 years. Success for one or more IART circuits was achieved in 36 patients (75%). The mean follow-up period of these patients was 25.4±17.8 months. IART recurrence was noted after successful catheterization in 9 (25%) of 36 patients. Among these 9 patients, 6 underwent repeat ablations and 3 were readministered antiarrhythmic medications. Conclusions: In patients with successful ablation, the frequency of arrhythmic events reduced compared to that before ablation. However, recurrence of IART in patients who showed clinical improvement was frequent, and careful clinical observation was important.
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