Table of Contents Author Guidelines Submit a Manuscript
The Scientific World Journal
Volume 2013, Article ID 562763, 10 pages
http://dx.doi.org/10.1155/2013/562763
Research Article

Associates of an Elevated Natriuretic Peptide Level in Stable Heart Failure Patients: Implications for Targeted Management

1Chronic Cardiovascular Disease Management Unit, St. Vincent's Healthcare Group/St. Michael's Hospital, Dublin, Ireland
2School of Medicine & Medical Science, UCD Conway Institute, University College Dublin, Dublin 4, Ireland

Received 14 August 2013; Accepted 10 October 2013

Academic Editors: C. Amarelli and C. Carbucicchio

Copyright © 2013 Aftab Jan et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Background. Persistently elevated natriuretic peptide (NP) levels in heart failure (HF) patients are associated with impaired prognosis. Recent work suggests that NP-guided therapy can improve outcome, but the mechanisms behind an elevated BNP remain unclear. Among the potential stimuli for NP in clinically stable patients are persistent occult fluid overload, wall stress, inflammation, fibrosis, and ischemia. The purpose of this study was to identify associates of B-type natriuretic peptide (BNP) in a stable HF population. Methods. In a prospective observational study of 179 stable HF patients, the association between BNP and markers of collagen metabolism, inflammation, and Doppler-echocardiographic parameters including left ventricular ejection fraction (LVEF), left atrial volume index (LAVI), and E/e prime (E/e′) was measured. Results. Univariable associates of elevated BNP were age, LVEF, LAVI, E/e′, creatinine, and markers of collagen turnover. In a multiple linear regression model, age, creatinine, and LVEF remained significant associates of BNP. E/e′ and markers of collagen turnover had a persistent impact on BNP independent of these covariates. Conclusion. Multiple variables are associated with persistently elevated BNP levels in stable HF patients. Clarification of the relative importance of NP stimuli may help refine NP-guided therapy, potentially improving outcome for this at-risk population.