Radiofrequency catheter ablation of left-sided accessory pathways via retrograde aortic approach in children

Background: We aimed to analyze the results of retrograde aortic radiofrequency catheter ablation of left-sided accessory pathways in children. Methods: Between January 2010 and September 2014, 25 children who underwent left-sided accessory pathway ablation with a retrograde aortic approach were evaluated retrospectively. Results: The mean age of the patients was 11.09 +/- 3.71 years. Seventeen patients were male (68%). The mean procedure and fluoroscopy times were 71.54 +/- 21.05 min and 31.42 +/- 19.57 min, respectively. Radiofrequency energy was delivered with 41.38 +/- 15.32 W at 52.38 +/- 5.45 degrees C. Sixteen patients (64%) presented with manifest preexcitation and, 9 had concealed accessory pathways. The location of accessory pathway was left lateral in 16 patients, posteroseptal in 5, left anterolateral in 2, and left posterolateral and left posterior in the remaining 2. The acute success rate was 96%. The patients were followed for a mean of 16.68 +/- 18.01 months. There were 2 recurrences. No major complications were observed in the periprocedural period. One patient had groin hematoma, another one had transient severe headache and vomiting. Trivial mitral regurgitation was noted in a patient, which remained the same throughout follow-up. None of the patients developed new aortic regurgitation, pericardial effusion, or thrombi at the site of ablation. Conclusions: The retrograde aortic approach can be safely employed with a high success rate for ablation of left-sided accessory pathways in children. (C) 2016 Japanese Heart Rhythm Society. Published by Elsevier B.V