Respiratory and Hemodynamic Changes Induced in Mechanically Ventilated Patients for COVID-19

Inclusion Criteria: * hospitalized in intensive care for a SARS-CoV2 infection * requiring invasive ventilation, * intubated for less than 72 hours with PaO2/FiO2 ratio \< 200 mmHg Exclusion Criteria: * Patient mechanically ventilated for 72 hours or more * Patient with documented respiratory co-infection * Patient with a contraindication to pulmonary artery catheter insertion: High risk of bleeding, pre-existing high degree of atrioventricular heart block , Pace Maker * Patient with spontaneous ventilation * Patient with severe ARDS with static compliance of the respiratory system \< 20 mL/cmH2O * Patient with severe ARDS with indication of prone positioning at inclusion. * Patient with a cardiac condition that renders the measurement of pulmonary artery occlusion pressure uninterpretable as a surrogate for left ventricle end diastolic pressure (severe mitral insufficiency, severe mitral stricture, severe aortic insufficiency). * Patient with intracardiac shunt * Patient with ECMO * Minors and pregnant women. * Person not affiliated to or not benefiting from a social security scheme.