Tricuspid Valve Tethering Is Associated with Residual Regurgitation after Valve Repair in Hypoplastic Left Heart Syndrome: A Three-Dimensional Echocardiographic Study

•TR mechanisms and factors related to surgical success in HLHS were assessed on 3DE. •Preoperative TV tethering is associated with residual TR after valve repair. •Preoperative tricuspid leaflet prolapse is associated with successful repair. •Valve repair improves TR by reducing annular size but does not change tether volume. Background Tricuspid valve regurgitation (TR) is a risk factor for morbidity and mortality in children with hypoplastic...