Fig. 1From: Mixed venous oxygen tension is a crucial prognostic factor in pulmonary hypertension: a retrospective cohort studyKaplan–Meier survival curves stratified by the presence of tissue hypoxia (PvO2 < 35 mmHg) in patients with PAH. A Group treated with selective pulmonary vasodilators (P = 0.001). B Untreated group (P < 0.001). PAH pulmonary arterial hypertension, PvO2 mixed venous oxygen tensionBack to article page