Figure 3From: Capillary pCO2 helps distinguishing idiopathic pulmonary arterial hypertension from pulmonary hypertension due to heart failure with preserved ejection fraction Diagnostic performance of pCO 2 . a) Sensitivity and specificity of pcCO2 for a diagnosis of PH-HFpEF. b) Positive and negative predictive value of pcCO2 for a diagnosis of PH-HFpEF.Back to article page