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Am J Cardiol. 2011 Apr 15;107(8):1191-5. doi: 10.1016/j.amjcard.2010.12.018. Epub 2011 Feb 4.

Acute changes in N-terminal pro-B-type natriuretic peptide during hospitalization and risk of readmission and mortality in patients with heart failure.

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  • 1Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA. hmichta1@jhmi.edu

Abstract

The level of N-terminal pro-B-type natriuretic peptide (NT-proBNP) is a predictor of adverse events in patients with heart failure. We examined the relation between acute changes in NT-proBNP during a single hospitalization and subsequent mortality and readmission. The data from a cohort of 241 consecutive patients aged ≥ 25 years who had been admitted to an urban tertiary care hospital with a primary diagnosis of heart failure were analyzed. Creatinine and NT-proBNP were measured at admission and at discharge of the first admission. The patient demographics, co-morbidities, and length of stay were collected. The patients were prospectively grouped into 2 categories according to the acute changes in NT-proBNP: a decrease of ≥ 50% or <50% from admission to discharge. The primary composite outcome was readmission or death within 1 year of the first hospital admission. The unadjusted hazard ratio of readmission/death was 1.40 (95% confidence interval 0.97 to 2.01; p = 0.07) for those with a < 50% decrease in NT-proBNP compared to their counterparts with a ≥ 50% decrease. After adjustment for age, gender, race, and admission creatinine and NT-proBNP, the risk of readmission/death was 57% greater for those with a < 50% decrease (hazard ratio 1.57, 95% confidence interval 1.08 to 2.28; p = 0.02). An adjustment for co-morbidity, length of stay, and left ventricular ejection fraction did not significantly change this relation. Reductions in NT-proBNP of < 50% during an acute hospitalization for heart failure might be associated with an increased hazard of readmission/death, independent of age, gender, race, creatinine, admission NT-proBNP, co-morbidities, left ventricular ejection fraction, and length of stay. In conclusion, patients with a < 50% reduction in NT-proBNP might benefit from more intensive medical treatment, monitoring, and follow-up.

Copyright © 2011 Elsevier Inc. All rights reserved.

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