Figure 2From: Differences of cardiac output measurements by open-circuit acetylene uptake in pulmonary arterial hypertension and chronic thromboembolic pulmonary hypertension: a cohort studyIndividual differences in cardiac output between thermodilution and acetylene uptake in patients with pulmonary arterial hypertension (a) and chronic thromboembolic hypertension (b), plotted against the average corresponding values (L/min). The solid line represents the mean or bias of the differences; the dashed lines represent the upper and normal limits of agreement.Back to article page