1 From the Arrhythmia Services, Schulich Heart Centre, Sunnybrook Health Sciences Centre and Division of Cardiology, Women's College Hospital, University of Toronto, Ontario, Canada (E.C., M.S.). [email protected].
2 From the Arrhythmia Services, Schulich Heart Centre, Sunnybrook Health Sciences Centre and Division of Cardiology, Women's College Hospital, University of Toronto, Ontario, Canada (E.C., M.S.).