As survival rates improve, more individuals with congenital heart disease are growing up and encountering new clinical concerns in adulthood. This HWC 2026 session covers long-term outcomes, surveillance and management approaches, and the specialized care needed in adults with CHD. Topics also address management of residual lesions, arrhythmias, heart failure, and pregnancy considerations as well as best practice for structured transitional care between pediatric and adult cardiology services. Specific attention is drawn to the necessity of necessity of lifelong follow-up and multidisciplinary coordination to maximize quality of life and minimize morbidity.