What is the role of cardiac catheterization in idiopathic pulmonary arterial hypertension (IPAH)?

Updated: Jul 08, 2020
  • Author: Ronald J Oudiz, MD, FACP, FACC, FCCP; Chief Editor: Zab Mosenifar, MD, FACP, FCCP  more...
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Cardiac catheterization is the criterion standard test to definitively confirm any form of PAH. It is essential in the workup of all patients suspected of IPAH. Excluding left-sided heart disease, including diastolic dysfunction, is especially important in these patients because of major treatment implications. Catheterization is also performed to determine pulmonary vasoreactivity, which can be prognostic and figures in the initiation and titration of high-dose calcium channel blocker (CCB) therapy.

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