Evaluation of the Effectiveness of Non-invasive Ventilation on the Reperfusion Pulmonary Edema Post Pulmonary Artery Angioplasty in the Post Embolic Pulmonary Hypertension

Inclusion criteria: * Age ≥ 18 years * First and /or second procedure of pulmonary artery angioplasty * Mean pulmonary arterial pressure ≥ 40 mmHg and/or pulmonary vascular resistance ≥ 8 WU (Wood unit) * Patient who signed informed consent * Patients affiliated to a social security program Exclusion criteria: * severe neurological disease: Coma Glasgow Scale \< 8, severe cognitive decline, postural instability, loss of autonomy. * psychiatric disease (illness) * sepsis, severe sepsis and septic shock, according to definitions and diagnostic criteria for sepsis of 'Surviving Sepsis Campaign 2012' * severe respiratory failure defined by a total lung capacity (TLC)\< 50% of the predicted value and/or expiratory volume in 1 second (FEV) \< 30% of predicted value * obstructive sleep apnea syndrome with Continuous Positive Airway treatment * preexisting hemorrhagic syndrome or coagulation factors deficiency * severe renal insufficiency with glomerular filtration rate \< 30 ml/min * severe hepatic failure with hepatic encephalopathy, hemodynamic disorder, decompensates cirrhosis, metabolic disorder( metabolic acidosis, hypoglycemia) hepatorenal syndrome, coagulation disorder (factor V\< 50%,disseminated intravascular coagulation) * patient refusal of participation in the study program * subjects not affiliated to social security program