Inclusion Criteria:  Patients hospitalized in intensive care unit and coronary unit of the Sherbrooke hospital/CHUS. Accepts healthy volunteers: 4 to 6 age- and sex-matched HV will be recruited and imaged at the end of the inclusion window for the assessment of cardiac energy tracer's uptake and as ref. controls.  Exclusion Criteria:  Pediatric patients Albumin allergy Moribond patients Patients too much unstable for the imaging procedure (clinical judgment) Unavailable tracers, staff, PET scan in a maximum delay of 72 hours