Prof. Dr. Natasja de Groot, cardiologist-electrophysiologist is appointed at Erasmus University Medical Center and Delft University of Technology. She is chief of the research unit Translational Electrophysiology, Department of Cardiology. Her research focuses on unravelling the electrical mechanism of cardiac arrhythmias, particularly arrhythmias in (pediatric) patients with congenital heart disease and (post-operative) atrial fibrillation. For this purpose, she has developed unique signal recording and processing technologies. With insights obtained from these technologies, she develops, tests and implements novel diagnostic instruments and therapies. She is a Fellow of the EHRA, co-chair of EHRA 2025 and is involved in writing various international guidelines of the European Society of Cardiology, European Heart Rhythm Association and Heart Rhythm Society. In her clinical work, she focuses on ablation therapy of patients with congenital heart disease and atrial tachyarrhythmias.