In this issue ofCardiac Electrophysiology Clinics, guest editors Drs. Maully J. Shah and Raina Bianca Tan bring their considerable expertise to the topic ofComplex 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.