Transcatheter patch occlusion of ventricular septal defect in Down syndrome.

Closure of perimembranous ventricular septal defects in patients with Down syndrome, either surgically or by Amplatzer occluders, carries a high risk of complete heart block. We report 5 closures using the transcatheter patch, a wireless bioabsorbable device without any reported heart block to date. The median defect size was 11 mm. Small devices were used in 4 patients and a medium size in 1. The patch was released after 48 hours in 3 patients and immediately in the other 2. Of the 5 patients, 3 were followed up for >5 years and 2 for 1 year. None of these patients had atrioventricular block during their follow-up. In conclusion, the transcatheter patch might be superior in terms of cardiac conduction system protection in patients with Down syndrome after ventricular septal defect closure.