Long-Term Outcomes After Percutaneous Closure of Ostium Secundum Atrial Septal Defect in the Young: A Nationwide Cohort Study.

OBJECTIVES:This study sought to assess procedural characteristics, early clinical outcome, and long-term complications after transcatheter closure of atrial septal defect (ASD) in children. BACKGROUND:Transcatheter closure has become the preferred strategy in most cases of isolated secundum ASD. However, reported experience in the pediatric population is limited. METHODS:A 1998 to 2016 retrospective multicenter study was performed in 9 French tertiary institutions. All children who had an attempt of percutaneous ASD closure with an Amplatzer Septal Occluder were included. RESULTS:In 1,326 children (39% males; median age, 9 years [0.7 to 18]; weight, 29 kg [3.6 to 92]), transcatheter ASD closure was performed. Median ASD size was 15 mm (3 to 41); 254 (19.1%) patients had a large ASD (≥20 mm/m2). Procedural success rate was 95.3% (95% confidence interval: 93.9% to 96.3%). No death was observed but periprocedural complications occurred in 24 patients (1.8%). After a median follow-up of 3.5 years (range 6 months to 18 years; 173 patients [13%] followed >10 years), delayed major complications were minimal (n = 12; 1.04%) including no death and/or cardiac erosion. Periprocedural and delayed complications rates were significantly higher in children ≤15 kg (5.2% vs. 1.5%; p = 0.007 and 3.1% vs. 0.7%; p < 0.007, respectively) and those with large ASD (3.5% vs. 1.4%; p = 0.008 and 1.7% vs. 0.7%; p = 0.052, respectively). CONCLUSIONS:Transcatheter ASD closure using Amplatzer Septal Occluder is safe in children with a minimal rate of periprocedural complications and a favorable long-term outcome, especially with no death or cardiac erosion despite a substantial proportion of large defects. Children ≤15 kg and those with large ASDs had a greater risk of complications.