What happens when a child is born with a heart that isn’t built to last—but must survive against the odds? Congenital heart disease remains the most common birth defect worldwide, with an even greater impact in low- and middle-income countries where access to specialized care is limited. This book takes you into the heart of pediatric cardiology through a compelling series of real-world cases—each one unique, complex, and deeply human. It explores the tough decisions, breakthrough procedures, and emotional journeys behind every successful intervention. More than a clinical guide, it is a tribute to the skill, resilience, and innovation of interventional pediatric cardiologists who fight for every heartbeat. A must-read for healthcare professionals, students, and anyone passionate about pediatric cardiology, this book underscores why advancing care for congenital heart disease isn’t just a medical mission—it’s a moral one. Radityo Prakoso, M.D., FIHA., FACC., FESC., FSCAI., is an interventional pediatric cardiologist, recognized for his contributions to zero-fluoroscopy and critical congenital heart disease interventions. He serves as the President of the Indonesian Heart Association (2022–2025). His expertise in complex transcatheter interventions has played a key role in establishing Indonesia as a center for cutting-edge congenital heart disease treatment. This recognition has positioned him as a distinguished international speaker at a prestigious interventional pediatric cardiology congress.