O-2 | Timing of Balloon Atrial Septostomy and Outcomes in Hybrid Stage 1 Palliation for Hypoplastic Left Heart Syndrome

Transcatheter balloon atrial septostomy (BAS) is often completed to enlarge the septal defect in patients with hypoplastic left heart syndrome (HLHS) palliated a hybrid stage 1 (HS1) procedure. The optimal timing of BAS relation HS1 has not been discussed literature. at our institution variable and based on anecdotal experiences. We hypothesized that same day completion would decrease hospital length stay, increase ICU-free days, improve hemodynamic markers cardiac function, transplant-free survival during first year life. retrospectively reviewed HLHS from January 2009 July 2022 center. excluded other single ventricle variants, those initially HS1, who did have or had it performed prior an initial intervention than BAS. Patients were divided into two groups: together (Group 1) > after 2). identified 118 underwent palliation, 92 whom met inclusion criteria, including 22 (23.9%) Group 1. Demographic data between groups statistically different. Median for 2 was 9 days (p<0.001). significantly lower stay (17 vs 27 p<0.001), higher recorded cerebral near infrared spectroscopy (NIRS) troughs (51% 45%, p=0.02), 30-day post-BAS/discharge brain natriuretic peptide levels (257 825 pg/mL, p<0.001) compared 2. trended greater (19 16 p=0.15), proportion 15 indexed admission (72.7% 48.6%, p=0.05). There no difference 1-year mortality, but median hospital-free age (321 267 Same resulted shorter improved more ICU/hospital-free experienced.