GORE® Cardioform ASD Occluder experience in transcatheter closure of 'complex' atrial septal defects

OBJECTIVE To evaluate the GORE® Cardioform ASD Occluder (GCO) (WL Gore & Associates, Flagstaff, AZ) device for "complex" atrial septal defects (ASD) closure. BACKGROUND Transcatheter ASD closure is still challenging in "complex" clinical/anatomic settings. This study evaluated the results of GCO in closure of "complex" ASD in a tertiary referral center. METHODS Between January 2020 and March 2021, 72 patients with significant ASD were submitted to transcatheter closure with GCO at our Institution. Based on clinical/anatomic characteristics, they were classified as "complex" (n = 36, Group I) or "simple" (n = 36, Group II). We considered as "complex", defects with rim deficiency ( 1.2 or diameter/patient BSA > 20 mm/m2 ) or within a multifenestrated septum. Procedure results and early outcome were compared between the groups. RESULTS Absolute and relative ASD size (20 ± 4 vs. 15 ± 3 mm, p