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Heart Lung Circ. 2008 Dec;17(6):497-501. doi: 10.1016/j.hlc.2008.06.001. Epub 2008 Aug 21.

Diagnostic and prognostic significance of plasma N-terminal-pro-brain natriuretic peptide in decompensated heart failure with preserved ejection fraction.

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1
Department of Cardiac Services, Flinders Medical Centre, Adelaide 5042, Australia. biju.paul@fmc.sa.gov.au

Abstract

BACKGROUND:

Preserved ventricular function is increasingly recognised in CHF. Although, NTpro-BNP is a well-established diagnostic marker in heart failure with impaired EF, its significance in heart failure with preserved EF is unclear. NT pro-BNP is secreted from the ventricular wall and plasma levels correlate to ventricular function. This study sought to determine the diagnostic and prognostic significance of plasma NTpro-BNP in patients with preserved EF heart failure.

METHODS:

We recruited 133 consecutive patients with decompensated HF. The primary end point was death or hospital readmission.

RESULTS:

Median (IQR) NTpro-BNP level at admission was elevated at 5043 ng/L (2693-10,784) and was significantly lower in preserved EF, 3569 ng/L (1707-6340) than in impaired EF, 6363 ng/L (3648-13,250) (P=0.001). Eight (6%) and 19 (14%) patients died after 1 and 6 months, respectively. In a regression analysis, worsening of NTpro-BNP levels after treatment was not predictive of mortality in heart failure with preserved EF (P=0.83). Levels at discharge correlated with readmission rates at 6 months in both groups, i.e. impaired (P=0.03) and preserved EF (P=0.02).

CONCLUSION:

NTpro-BNP is a reliable diagnostic marker of decompensation. However, in preserved EF heart failure, the plasma levels are significantly lower and a worsening in levels after treatment is not predictive of mortality.

PMID:
18722158
DOI:
10.1016/j.hlc.2008.06.001
[Indexed for MEDLINE]
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