Nico A Blom MD, PhD, is Pediatric Cardiologist at the Department of Pediatric Cardiology of the Leiden University Medical Center (LUMC), Leiden, The Netherlands. The Leiden University Medical Center is part of the Center of Congenital Heart Disease Amsterdam/Leiden. He is a member of the Dutch Society of Cardiology, the Dutch Society of Pediatrics/Section Pediatric Cardiology, the Association for European Pediatric Cardiology (AEPC), and the Working Group Dysrhythmias and Electrophysiology of the AEPC. Following his pediatrics training at the pediatrics training in the Academical Medical Center, Amsterdam, he undertook further training in pediatric cardiology followed by electrophysiology at the Leiden University Medical Center (LUMC). He has been the Head of the Pediatric Catheterization and EP laboratory in the LUMC since 2000.