Primary Outcome Measures:
Data describing the natural history of idiopathic and familial pulmonary arterial hypertension were derived from a registry conducted at our institution prior to 2006. Since then, targeted therapies for pulmonary arterial hypertension have been introduced in China. It is probably that the prognosis of Chinese patients with WHO group I pulmonary arterial hypertension and WHO group IV pulmonary hypertension due to chronic thromboembolic pulmonary hypertension has also been improved as western countries. Therefore, the aim of the present study was to describe real-world outcome of Chinese patients with pulmonary arterial hypertension and chronic thromboembolic pulmonary hypertension and identify factors that may predict outcome. Our study will provide an updated picture of the clinical course of a more broadly defined scope of pulmonary hypertension and the effects of current therapy on survival, enabling the collection of data on demographics, clinical course, treatments, and outcomes.