1 Department of Critical Care Medicine, Sunnybrook Health Sciences Centre, Toronto, Ontario, Canada; Division of Cardiology, St Michael's Hospital, Toronto, Ontario, Canada; Temerty Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada. Electronic address: varinder.randhawa@gmail.com.
2 Division of Cardiology, Department of Critical Care, University of Alberta, Edmonton, Alberta, Canada.
3 Division of Cardiology, University of Ottawa Heart Institute, Ottawa, Ontario, Canada.
4 Department of Anaesthesiology, Montréal Heart Institute, Université de Montréal, Montréal, Québec, Canada.
5 Intensive Care Department of Paediatrics, The Royal Childrens Hospital, Melbourne, Victoria, Australia.
6 Harrington Heart Vascular Institute, University Hospitals and Case Western Reserve University, Cleveland, Ohio, USA.