Figure 1From: Experience with exercise right heart catheterization in the diagnosis of pulmonary hypertension: a retrospective studyPatients and diagnostic groups after right heart catheterization. HFnEF, heart failure with normal ejection fraction, PAH, pulmonary arterial hypertension; PH, pulmonary hypertension; COPD, chronic obstructive pulmonary disease; CTEPH, chronic thromboembolic pulmonary hypertension; TPG, transpulmonary pressure gradient.Back to article page