In this issue of Cardiac Electrophysiology Clinics, guest editors Drs. Maully J. Shah and Raina Bianca Tan bring their considerable expertise to the topic of Complex Arrhythmias in Pediatrics and Congenital Heart Disease. Top experts discuss key topics in this area, including advances in medical imaging, catheter-based interventions, and device therapy that have improved the ability to manage complex arrhythmias in pediatric patients, offering affected children better outcomes and quality of life.