Change-a Multi-center Chronic Thromboembolic Pulmonary Hypertension （CTEPH） Database in China

Inclusion Criteria: 1. Patients must be diagnosed with chronic thromboembolic pulmonary hypertension (CTEPH) 2. Patients must be willing to provide informed consent 3. Patients must meet the following criteria for CTEPH: a mean pulmonary artery pressures (mPAP) ≥20 mmHg combined with a pulmonary vascular resistance (PVR) ≥ 3 WU and pulmonary arterial wedge pressure (PAWP)≤ 15 mmHg documented at right heart catheterization with radiographic evidence of organized thrombi involving the pulmonary arteries after 3 months of effective anticoagulation. Exclusion Criteria: 1. Main cause of PH other than CTEPH 2. Participation in a therapeutic clinical trial with an unknown drug; 3. Withdrawal or lack of informed consent.