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  • Title: [Prognostic value of admission B-type natriuretic peptide on outcome for patients with congestive heart failure].
    Author: Deng XT, Shi GL, Wang RX, Zhao JX, Zheng JG, Bao YF.
    Journal: Zhonghua Xin Xue Guan Bing Za Zhi; 2012 Jun; 40(6):462-6. PubMed ID: 22943638.
    Abstract:
    OBJECTIVE: To observe the prognostic value of admission B-type natriuretic peptide (BNP) on outcome for patients with congestive heart failure (CHF). METHODS: Blood BNP levels, routine echocardiography and tissue Doppler image were obtained in 162 CHF patients [95 male, mean age: (71.8±3.7) years] at admission. Patients were divided into high BNP (BNP>1500 ng/L, n=104) and low BNP (BNP≤1500 ng/L, n=58) groups. All patients were followed up for 2 years and clinical characteristics, echocardiography including Doppler image and cardiovascular events results were analyzed. Data were also compared between patients with (n=48) or without (n=107) cardiovascular events. RESULTS: Left ventricular ejection fractions (LVEF) was significantly lower [(40.9±5.6)% vs. (44.0±5.9)%, P<0.01] while the total cardiovascular events rate (49.1% vs. 21.0%, P<0.01) and cardiac mortality rate (25.5% vs. 9.0%, P<0.01) were significantly higher in high BNP group than in low BNP group. BNP level at admission in event group was significantly higher than in event-free group [(2875.4±325.7) ng/L vs. (1136.9±298.6) ng/L, P<0.000]. BNP level was positively related to Tei-index (r=0.793, P<0.001) and negatively correlated with LVEF (r=-0.57, P<0.001). Multiple logistic regression analysis demonstrated that BNP, LVEF, Tei-index and β-blocker use were independent risk factors for cardiovascular events. The area under the ROC curve for predicting cardiovascular death within 2 years in event group by BNP was 0.795 (95%CI 0.693-0.935, sensitivity: 72.31% and specificity: 84.62%, cut-off BNP value: 1910 ng/L). The event risk was 2.17 times higher in CHF patients with admission BNP>1910 ng/L compared CHF patients with admission BNP≤1910 ng/L (95%CI: 1.852-2.954, P=0.000). CONCLUSION: Admission BNP level, LVEF, Tei-index and β-blocker use are independent risk factors for cardiovascular events in patients with CHF. Patients with higher admission BNP level (>1910 ng/L) is linked with worse prognosis in this patient cohort.
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