Clinical Research Directory

Inclusion Criteria: Patients with pulmonary arterial hypertension or chronic thromboembolic pulmonary hypertension diagnosed after 1st March 2018 (incident cases) who: * are aged \> 3 months at the time of enrollment * fulfill the following hemodinamic criteria: mean pulmonary arterial pressure (mPAP) of 25 mm Hg or more, mean pulmonary arterial wedge pressure (PAWP) or left ventricular end-diastolic pressure (PVEDP) of 15 mm Hg or less, pulmonary vascular resistance (PVR) of 3 Woods. Patients with pulmonary arterial hypertension or chronic thromboembolic pulmonary hypertension diagnosed before 1st March 2018 (prevalent cases) who: * are aged \> 3 months at the time of enrollment * fulfill the following hemodinamic criteria: mean pulmonary arterial pressure (mPAP) of 25 mm Hg or more, mean pulmonary arterial wedge pressure (PAWP) or left ventricular end-diastolic pressure (PVEDP) of 15 mm Hg or less, pulmonary vascular resistance (PVR) of 3 Woods