Functional classification of heart failure before and after implementing a healthcare transition program for youth and young adults transferring from a pediatric to an adult congenital heart disease clinics.

Objective: To describe changes in functional status between the last pediatric and first adult congenital heart disease (CHD) clinic visits in patients with moderate to severe CHD after implementing a healthcare transition (HCT) planning program.

Design: Quasi-experimental design. Patients were followed prospectively following the implementation of the intervention; Control patients transitioned from the Pediatric CHD Clinic into Adult CHD Clinic before the intervention.