15 CTEPH centers will be enrolled in the study. The epidemiology, diagnosis， treatments (pulmonary endarterectomy (PEA) and balloon pulmonary angioplasty (BPA)), and long-term prognosis of CTEPH will be evaluated.
The Change Database is a prospective, observational multi-center disease registry, which will collect data on patients with chronic thromboembolic pulmonary hypertension (CTEPH) in China. The registry will run for approximately 5 years. It aims to illustrate the epidemiology, management and longterm outcomes of CTEPH.