RESEARCH SUPPORT, NON-U.S. GOV'T
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Portopulmonary hypertension: a report from the US-based REVEAL Registry.

Chest 2012 April
BACKGROUND: We evaluated survival and hospitalization rates in patients with group 1 portopulmonary hypertension (PoPH) in the Registry to Evaluate Early and Long-term Pulmonary Arterial Hypertension Disease Management (REVEAL Registry).

METHODS: The REVEAL Registry is a multicenter, observational, US-based study evaluating demographics and management of patients with pulmonary arterial hypertension (PAH). Outcomes were examined using Kaplan-Meier time-to-event estimates and compared with patients with idiopathic PAH (IPAH) or familial PAH (FPAH).

RESULTS: One hundred seventy-four patients with PoPH were enrolled in the REVEAL Registry (IPAH/FPAH; n = 1,478) from March 2006 to December 2009. Mean age was 53 ± 10 years, 52% were female, 32% were newly diagnosed, and 6% were New York Heart Association/World Health Organization functional class IV. Outcome parameters were worse for PoPH vs IPAH/FPAH, respectively: 2-year survival from enrollment (67% vs 85%, P < .001), 5-year survival from time of diagnosis (40% vs 64%, P < .001), and 2-year freedom from all-cause hospitalization (49% vs 59%, P = .019). However, despite worse outcomes, hemodynamic parameters at diagnosis were better for PoPH vs IPAH/FPAH, respectively: mean pulmonary artery pressure (49 mm Hg vs 53 mm Hg, P < .001), mean right atrial pressure (9 mm Hg vs 10 mm Hg, P = .005), pulmonary vascular resistance (8 Wood units vs 12 Wood units, P < .001), and cardiac output (5 L/min vs 4 L/min, P < .001). Compared with patients with IPAH/FPAH, patients with PoPH were less likely to be on a PAH-specific therapy at enrollment (P < .001), suggesting potential delays in therapy for patients with PoPH.

CONCLUSIONS: Patients with PoPH had significantly poorer survival and all-cause hospitalization rates compared with patients with IPAH/FPAH, despite having better hemodynamics at diagnosis. Further studies should investigate such outcomes and differences in treatment patterns.

TRIAL REGISTRY: ClinicalTrials.gov; No.: NCT00370214; URL: www.clinicaltrials.gov.

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