Angioplasty of Distal Lesions for Carriers of Inoperable Post-embolic HTP

Inclusion Criteria: * Patients over 18 years * Patients with a pulmonary hypertension diagnosed by right catheterisation, with a mean arterial pressure \>30 mmHg and arterial pulmonary resistance \> 3 UW. * Patients with group 4 (Dana point) pulmonary hypertension, thromboembolic. * Chronic thrombosis visible to scanner, pulmonary IRM angiogram or to pulmonary angiogram. * Patient's file refused by the reference center multidisciplinary coordination meetings for surgical thromboendartériectomy or refusal from the patient to be operate. * Absence of counter-argument to the femoral venous or jugular way. * Normal kidney function or moderatly degraded (clearance\>30 mL) or dialysed renal failure * Persons affiliated to national social security * Signed free consent by patients Exclusion Criteria: * Pulmonary hypertension pos-embolic operated by thromboendarteriectomy * Pulmonary hypertension Group 1 of Dana Point, meaning idiopathic, familial, post-anorectics, associate with a congenital heart disease associated to a scleroderma, associated to a chronic hemolytic disease * Pulmonary hypertension Group 2 of Dana Point, associated with a left cardiovascular disease * Pulmonary hypertension Group 3 of Dana Point, associated to a respiratory disease * Pulmonary hypertension Group 5 of Dana Point, of unclear or multifactorial mechanism * Hypersensitivity to HEXABRIX, to iodinated contrast product or one of its components * Obvious thyrotoxicosis * Protected major persons * Pregnant or breastfeeding women * Persons deprived of liberty * Persons in emergency situations. * No consent signed or approoved * Persons no affiliated to national social security