1 Section of Cardiology, Department of Internal Medicine, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, MB, Canada.
2 Institute of Cardiovascular Sciences, St. Boniface Hospital, University of Manitoba, Winnipeg, MB, Canada.
3 Department of Radiology, St. Boniface Hospital, University of Manitoba, Winnipeg, MB, Canada.
4 Department of Physiology and Pathophysiology, Max Rady College of Medicine, Rady Faculty of Health Sciences, University of Manitoba, Rm Y3531, Bergen Cardiac Care Centre, St. Boniface Hospital 409 Tache Avenue, Winnipeg, MB R2H 2A6, Canada.