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Figure 1: The distribution of the study cohort RHC = Right heart catheterization, PAH = Pulmonary arterial hypertension, Pts., patients, WHO = World Health Organization, IPAH = Idiopathic pulmonary arterial hypertension, PAH-ACHD = Congenital heart disease-associated pulmonary arterial hypertension, PAH-ACTD = Connective tissue disease-associated pulmonary arterial hypertension, HPAH = Heritable pulmonary arterial hypertension, Po-APAH = Portal hypertension-associated pulmonary arterial hypertension (portopulmonary hypertension)

Figure 1: The distribution of the study cohort RHC = Right heart catheterization, PAH = Pulmonary arterial hypertension, Pts., patients, WHO = World Health Organization, IPAH = Idiopathic pulmonary arterial hypertension, PAH-ACHD = Congenital heart disease-associated pulmonary arterial hypertension, PAH-ACTD = Connective tissue disease-associated pulmonary arterial hypertension, HPAH = Heritable pulmonary arterial hypertension, Po-APAH = Portal hypertension-associated pulmonary arterial hypertension (portopulmonary hypertension)