Dr. Mertens is currently Section Head Echocardiography at The Hospital for Sick Children in Toronto, and Associate Professor at the University of Toronto.
Mertens obtained his medical degree at the University of Leuven, Belgium, as well as a doctoral degree in Medical Sciences (Physiology and Molecular Biology). He trained in Paediatrics and Paediatric Cardiology at the University Hospitals Leuven in Belgium and at The Mayo Clinic in Rochester, MN (USA). He worked as a paediatric cardiologist at the University Hospitals in Leuven between 1998 and 2008. His clinical expertise is in paediatric echocardiography, and his research interests focus on studying cardiac function in children.