What is idiopathic pulmonary arterial hypertension (IPAH) (precapillary pulmonary hypertension)?

Updated: Jul 08, 2020
  • Author: Ronald J Oudiz, MD, FACP, FACC, FCCP; Chief Editor: Zab Mosenifar, MD, FACP, FCCP  more...
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Idiopathic pulmonary arterial hypertension (IPAH) is a rare disease characterized by elevated pulmonary artery pressure with no apparent cause. IPAH is also termed precapillary pulmonary hypertension and was previously termed primary pulmonary hypertension. The term IPAH is now the preferred term for pulmonary arterial hypertension of unknown etiology; thus, IPAH represents pulmonary vascular disease with a spectrum of clinical presentations.

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