Figure 1From: Differences of cardiac output measurements by open-circuit acetylene uptake in pulmonary arterial hypertension and chronic thromboembolic pulmonary hypertension: a cohort studyCardiac output measurements by thermodilution compared with results obtained by the acetylene technique in patients with pulmonary arterial hypertension (a) and chronic thromboembolic hypertension (b). The solid line represents the bisecting line.Back to article page