Pr Lucile Houyel is a pediatric cardiologist and cardiac morphologist at Hôpital Necker-Enfants Malades, Paris, France. She is Deputy Head of Department since 2021 and co-coordinates the M3C (French Congenital Cardiac Complex Malformations network) with Pr Damien Bonnet. She is specialized in anatomy of congenital cardiac defects, echocardiography and heart transplantation. She is member of the Working Group “Cardiac Morphology” of the Association of European Pediatric Cardiologists (AEPC), member of the Working Group “Anatomy, Development and Pathology” of the European Society of Cardiology (ESC), and first vice-president of the International Society for Nomenclature of Pediatric and Congenital Heart Disease (ISNPCHD).