1 Department of Anesthesia & Critical Care Division, Montreal Heart Institute, Université de Montréal, Montreal, Quebec, Canada. Electronic address: andre.denault@umontreal.ca.
2 Department of Cardiovascular Medicine, Stanford University, Stanford, Calif.
3 Department of Cardiac Surgery, Critical Care Division, Montreal Heart Institute, Université de Montréal, Montreal, Quebec, Canada.
4 Department of Medicine, Montreal Heart Institute, Université de Montréal, Montreal, Quebec, Canada.
5 Department of Anesthesia & Critical Care Division, Montreal Heart Institute, Université de Montréal, Montreal, Quebec, Canada.