PO-03-144 FIRST LATIN AMERICAN RETROSPECTIVE REGISTRY OF CARDIAC ABLATION IN PEDIATRIC AND CONGENITAL HEART DISEASE PATIENTS. A LAHRS REGISTRY

Abstract

Tachyarrhythmias are common in the pediatric and congenital heart disease patients. Ablation has been proved as an effective and safe therapeutic alternative in this population. There are international registries on the use of catheter ablation in children and congenital heart disease, but not from Latin America To assess the clinical characteristics of pediatric and congenital heart disease patients undergoing invasive EP procedures, type of arrhythmias, employed approaches and techniques and success, complications and recurrence rates. A descriptive and analytical observational study was carried out. A closed coded online form available for 6 months was used. All electrophysiologists who practice in Latin America were invited to participate through LAHRS electronic media (https://lahrs.org/). Participation was not mandatory, it was not encouraged by any economic or material goods, and informed consent for the use of the data was required. Consecutive electrophysiological catheter procedures were included in children under 18 years of age or patients older than 18 with congenital heart disease, between 2017 and 2021. A total of 1200 procedures were reported, and all were included. Sixteen physicians from 6 Latin American countries participated. 58 % (703) of the patients were male; mean age at the time of the procedure was 12,7± 7,1 years and the mean weight was 46,4 ± 14,4 kg and 10,5 %(126) had congenital heart disease. In 17 % (212) a 3D mapping system was used. In 94,5 % (1135) ablation was attempted, using a conventional catheter in 87,6 % (1052) of them. Radiofrequency was the most commonly used energy source, representing 91% of the cases.The most frequent substrates were accessory pathways in 80,5 % (967) of which 68% were manifest, followed by AV nodal reentry in 18 % (217) and atrial tachycardia in 5,4 % (65). Additionally, there were 5% (60) atrial flutters, 3,9% (47) ventricular tachycardias, and 1,75% (21) PVCs. Acute success rate was 98 % (1117). Mean total procedural time was 107,6 ± 42,7 minutes and the total fluoroscopy time was 17,5 ± 11,2 minutes. There was a complication rate of 2,7% (32), including complete AV block in 3 patients. The recurrence rate was 9%. This is the first retrospective registry of pediatric ablation in Latin America. In line with previously reported registries, ablation has proved to be an effective and safe alternative for the treatment of pediatric patients with arrhythmias