Improved diagnostics and surgical techniques have drastically enhanced survival rates in pediatric cardiology and congenital heart defects. Congenital heart anomalies, once fatal in infancy, are now routinely managed with interventional cardiology and staged surgical repair. Early fetal echocardiography allows prenatal diagnosis, facilitating immediate postnatal planning. Pediatric cardiologists utilize 3D imaging, catheter-based procedures, and hybrid techniques that reduce the need for open-heart surgeries. Long-term care also addresses potential complications such as arrhythmias, growth delays, and psychosocial impacts. Transitioning care into adolescence and adulthood has become a priority, ensuring continuity for congenital heart disease survivors. The growing sophistication of cardiac genetics and regenerative research offers a promising future for both detection and therapy in this intricate field.