Chronic Thromboembolic Disease Registry

Inclusion Criteria: * Patients referred with CTED and/or CTEPH defined as: 1. Mean pulmonary arterial pressure (mPAP) \> 20 mmHg at rest with pulmonary vascular resistance (PVR) \> 2 Wood units (WU); or if mPAP ≤ 20 mmHg or PVR ≤ 2 WU at rest, have exercise limitations from chronic thromboembolic pulmonary disease (CTEPD) without pulmonary hypertension (PH) 2. Radiologic finding of chronic thromboembolic disease, including abnormal ventilation perfusion scan, pulmonary angiogram, computer tomographic pulmonary angiogram, or magnetic resonance pulmonary angiogram 3. Post-embolic exercise intolerance and evidence of chronic thromboembolic disease in the absence of resting pulmonary hypertension * Treatment with anticoagulation for ≥ 3 months before diagnosis of CTEPH or CTEPD without PH * Age ≥ 18 years Exclusion Criteria: * Main cause of PH other than World Health Organization (WHO) group 4 (CTEPH) * Patient's refusal to participate in clinical research and/or receive intervention