Safety and efficacy of transcatheter closure of outlet-type ventricular septal defects in children and adults with Amplatzer Duct Occluder II

Background/purpose: Outlet-type VSD is frequently associated with aortic valve prolapse that surgery is frequently required. The literature regarding outcomes of transcatheter closure of outlet-type VSDs is scant. This study was conducted to know the safety and efficacy of transcatheter closure of outlet-type ventricular septal defects (VSDs) with Amplatzer Duct Occluder II (ADO II). Methods: Medical records of patients underwent attempted transcatheter closure of outlet-type VSD with ADO II between October 2013 and August 2019 were retrospectively reviewed. Results: Among 49 patients, transcatheter closure was successful in 45 (91.8%; 33 males and 12 females; mean [+/- standard deviation] age and body weight: 15.8 (+/- 17.7) years and 36.6 (+/- 23.3) kg, respectively). The median VSD diameter was 4.0 mm (range: 1.2-6.0 mm). Device closure failed in four because the sheath could not be advanced through a prograde or retrograde route in one patient, occluder embolization in the two patients, and failed right ventricular disc anchoring in one patient. After a mean follow-up of 22.7 months (range: 0.3-51.1 months), only nine (20.0%) patients had increased severity in aortic regurgitation (AR) on the echocardiography. Preprocedural AR decreased in severity or even disappeared in 11 (24.4%) patients. No heart block or device failure occurred during follow-up. A trivial-to-small residual shunt was detected in 19 patients (42.2%) in the most recent echocardiography. Conclusion: Transcatheter closure of outlet-type VSDs with ADO II is feasible. Although no significant aggravation of AR was observed in the short-to-mid-term follow-up, long-term follow-up is mandatory. Copyright (C) 2020, Formosan Medical Association. Published by Elsevier Taiwan LLC.