This book presents a series of illustrative cases to highlight the decision-making process in pursuing an interventional management strategy and the procedural details of performing catheter-based interventions in patients with adult congenital heart disease (ACHD). Each case provides a brief prior history of the patient, summary of current symptoms, pertinent physical examination findings, key imaging findings used to determine the indication for intervention as well as the technical feasibility of a transcatheter intervention. Potential management options and the rationale for why a transcatheter intervention was the optimal management strategy, and post-procedure management strategies are also discussed.