1 Intensive-care Unit, Yves Le Foll Hospital, Saint-Brieuc, France.
2 Department of Anesthesia and Critical Care, Pontchaillou, University Hospital of Rennes, Rennes, France.
3 Department of Thoracic and Cardiovascular Surgery, Signal and Image Treatment Laboratory (LTSI), Inserm U1099, Pontchaillou University Hospital, University of Rennes 1, Rennes, France.
4 Service de Cardiologie, Univ Rennes, CHU de Rennes, Inserm LTSI U1099, F-35000, Rennes, France.
5 Department of Surgery, University of California Davis Medical Center, Sacramento, CA, USA.
6 CIC 1414 (Centre d'Investigation Clinique de Rennes), Univ Rennes, CHU Rennes, Inserm, F-35000, Rennes, France.
7 Institut NUMECAN-UMR_A 1341, UMR_S 1241, Univ Rennes, CHU de Rennes, Inra, Inserm, F-35000, Rennes, France.