Dr. Stephenson is an Associate Professor at the University of Toronto, and Section Head of Cardiac Electrophysiology at The Hospital for Sick Children. Her undergraduate degree was done at Mount Holyoke College, where she graduated with Honors in Biology and High Honors in Philosophy with a focus on medical ethics in the pediatric population. She received her MD from Columbia University, College of Physicians and Surgeons and her MSc in Clinical Epidemiology from the University of Toronto. Her pediatric residency, cardiology fellowship, and electrophysiology fellowship were all done at Children’s Hospital, Boston. Dr. Stephenson’s research work in electrophysiology has focused on clinical investigations, centered on several topics in the field of electrophysiology and heart function, particularly as related to pediatric use of pacemakers, cardiac resynchronization therapy, and implantable cardioverter defibrillators. She has been a member of the SickKids REB since 2007 and Chair of the SickKids Research Ethics Board since January 2015.