The investigators hypothesize that the airway pressures generated by High Flow Oxygen Therapy could have a beneficial impact in patients with heart failure, particularly by lowering capillary pulmonary arterial pressures. However, results compared to Non-Invasive Ventilation are difficult to predict due to the lack of data in the literature.
Major patient
Patient who has undergone cardiac surgery with extracorporeal circulation for more than 24 hours and has been extubated for at least 6 hours.
Pre-operative heart failure with left ventricular ejection fraction < 40%.
Invasive monitoring by pulmonary arterial catheter (Swan-Ganz) with transpulmonary thermodilution and by radial arterial catheter intended for use in the intra- and post-operative monitoring of the patient.
Contraindication to the use of NIV or HFO
Patient with orotracheal intubation or tracheotomy
Renal failure with hemodialysis or hemofiltration
Uncontrolled state of shock (PAS<90 mmHg and/or cardiac index<1.8 L/min/m² and/or norepinephrine>0.2 μg/kg/min and/or dobutamine>10 μg/kg/min)
University Hospital, Rouen
Lead sponsor