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  • Title: Heterogeneity of the prognostic significance of B-type natriuretic peptide levels on admission in patients hospitalized for acute heart failure syndromes.
    Author: Minami Y, Kajimoto K, Sato N, Hagiwara N, Takano T, Mebazaa A, ATTEND Study Investigators.
    Journal: Eur J Intern Med; 2016 Jun; 31():41-9. PubMed ID: 26880295.
    Abstract:
    BACKGROUND: We hypothesized that variation in baseline characteristics of patients with acute heart failure syndromes (AHFS) affects the prognostic significance of B-type natriuretic peptide (BNP) levels because of heterogeneity of this patient population. We evaluated the association of elevated BNP levels on admission with an increased risk of adverse clinical outcomes in subgroups of patients hospitalized for AHFS. METHODS: This study included patients from the acute decompensated heart failure syndromes (ATTEND) study, a multicenter prospective cohort of 4501 AHFS patients with BNP data on admission. RESULTS: The geometric mean BNP level was 654.9pg/mL (95% confidence interval: 636.1-674.2), and the optimal cut-off value for all-cause death was 1157pg/mL. All-cause mortality after admission was significantly higher in patients with high BNP levels (>1157pg/mL) than in those with low BNP levels (≤1157pg/mL) (median follow-up: 508days, log-rank P<0.001). Subgroup analyses were performed to evaluate the heterogeneity of the prognostic significance of BNP levels. The effect of high BNP levels on the risk of all-cause mortality was significantly greater in the subgroup of patients with a non-hypertensive etiology, low creatinine levels (<1.3mg/dL), and high sodium levels (≥135mEq/L) than in those without these factors (P=0.024, P<0.001, and P<0.001 for the interaction, respectively). CONCLUSIONS: The present analysis shows that underlying etiology of heart failure (i.e., hypertensive), renal function, and sodium levels should be considered for assessing the clinical significance of elevated BNP levels on admission in relation to the risk of adverse outcome after hospitalization for AHFS.
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