Fig. 1From: The clinical characteristics of patients with pulmonary hypertension combined with obstructive sleep apnoeaFlow chart of patient inclusion and exclusion. RHC, right heart catheterization; liver and kidney insufficiency, defined as a liver enzyme more than 3 times the normal value and a creatinine clearance rate < 30 ml/min; BMI, body mass index; mPAP, mean pulmonary artery pressureBack to article page