Acute Decompensation of Pulmonary Hypertension

Inclusion Criteria: * Adult patients over 18 years * Diagnosis of Pulmonary arterial hypertension or non-operable chronic thromboembolic pulmonary hypertension established by right cardiac catheterization prior to inclusion in the study * Patients admitted in intensive care unit for acute decompensation of pulmonary hypertension requiring intravenous diuretic therapy ± use of inotropes or vasopressors. * Patients must have given their written informed consent to participate in the study after having received adequate previous information and prior to any study-specific procedures Exclusion Criteria: * Patients with post-capillary pulmonary hypertension * Patients with pulmonary hypertension associated with chronic respiratory disease * Patients with pulmonary hypertension with unclear/or multifactorial mechanisms * Patients with operable chronic thromboembolic pulmonary hypertension * Shock due to another cause than acute decompensation of pulmonary hypertension * Pregnant women, or breast feeding women * Adult protected person * Person deprived of liberty * Person admitted without consent * Pregnant or breastfeeding women