![]() Patient-related factors are the most significant predictors of treatment success. Ten percent of the patients needed a redo procedure within the first year. The major complication rate was 4.5% (68/1514) with no deaths. A relapse during the first 3-month blanking period was associated with a nine-fold risk of failure at 1 year (unadjusted OR 9.1, 95% CI 5.5–15.1, p < 0.001). The experience at the centre did not associate with the 1-year outcome. Preoperative predictors of treatment success were paroxysmal AF type, previous use of antiarrhythmic drugs, left atrium diameter and age. Treatment success was observed in approximately 62.9% of the ablation-naïve patients. Treatment success (maintenance of sinus rhythm at 1 year) was evaluated among patients residing within the hospital district (45% of the entire study population). ![]() ![]() Comprehensive data on patient characteristics, treatment results, redo operations and complications were collected. Methodsĭata on patients ( n = 1,253) treated with catheter ablation for AF in Tays Heart Hospital between January 2010 and May 2018 was evaluated ( n = 1178 ablation-naïve patients and n = 1514 AF ablations). The aim of this study was to evaluate treatment success and its predictors and to provide quality control data on complications and redo operations in a centre with an initially a low but currently high annual volume. Catheter ablation for atrial fibrillation (AF) is a standard procedure for maintaining sinus rhythm.
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