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Serial development of pulmonary hypertension in patients with idiopathic pulmonary fibrosis.

BACKGROUND: Idiopathic pulmonary fibrosis (IPF) is a disease with very high mortality.

OBJECTIVE: We sought to characterize serial changes in pulmonary artery pressures (PAP) in patients with advanced IPF who survive to transplant.

METHODS: Retrospective analysis of IPF patients comparing mean PAP at the time of initial evaluation for transplan- tation (mPAP(baseline)) with mPAP at the time of transplant (mPAP(follow-up)). The measurements were correlated with New York Heart Association (NYHA) functional class and oxygen requirements.

RESULTS: The final cohort consisted of 44 patients with serial right heart catheterization data. The mean mPAP(baseline) and mPAP(follow-up) were 22.5 and 32.7 mm Hg, respectively. 38.6% (17/44) of the patients had pulmonary hypertension (PH) at baseline. The majority of the non-PH patients developed PH during the serial time interval with a subsequent incidence of 77.8%. At the time of transplant, 86.4% of the patients had PH. There was a significant association between transplant NYHA class, severity of PH and oxygen requirements. Transplant NYHA class IV patients had a higher rate of mPAP change. The severity of PH at the time of transplant did not affect transplant outcomes.

CONCLUSION: PH is common and progressive in patients with advanced IPF who are transplant candidates. Serial change and severity of PAP elevations have a significant association with oxygen requirements and functional status, but not transplant outcomes. Whether or not progressive PH has a significant impact on outcomes without transplantation requires further study.

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