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  • Title: Does preoperative B-type natriuretic peptide better predict adverse outcome and prolonged length of stay than the standard European System for Cardiac Operative Risk Evaluation after cardiac surgery?
    Author: Fellahi JL, Daccache G, Rubes D, Massetti M, Gérard JL, Hanouz JL.
    Journal: J Cardiothorac Vasc Anesth; 2011 Apr; 25(2):256-62. PubMed ID: 20674395.
    Abstract:
    OBJECTIVES: Although B-type natriuretic peptide (BNP) strongly predicts cardiac morbidity and mortality, the European System for Cardiac Operative Risk Evaluation (EuroSCORE) has a modest predictive value to identify a composite operative risk after cardiac surgery. The authors tested the hypothesis that a single preoperative BNP measurement would be superior to standard EuroSCORE in predicting composite adverse outcomes after cardiac surgery. DESIGN: A prospective observational study. SETTING: A teaching university hospital. PARTICIPANTS: Two hundred eight adult patients. INTERVENTIONS: Conventional cardiac surgery with cardiopulmonary bypass. MEASUREMENTS AND MAIN RESULTS: The preoperative additive EuroSCORE and BNP measurement were performed in all patients. Postoperative nonfatal major adverse cardiac events (malignant ventricular arrhythmia, myocardial infarction, and cardiac dysfunction), all-cause mortality, and prolonged lengths of stay were chosen as study endpoints. Predictive abilities of both EuroSCORE and BNP were assessed using logistic regression and compared with receiver operating characteristic (ROC) curves. Thirty-six (17%, 95% confidence interval [CI], 12%-22%) patients experienced 49 events over the study period. The areas under the ROC curves assessing the utility of EuroSCORE and BNP in predicting adverse outcome and prolonged in-hospital stay were 0.59 (95% CI, 0.48-0.69) versus 0.76 (95% CI, 0.68-0.85; p < 0.001) and 0.65 (95% CI, 0.57-0.74) versus 0.71 (95% CI, 0.63-0.80; p = 0.147), respectively. Using logistic regression, BNP considered as a dichotomized variable was the only independent predictor of adverse cardiac outcome (adjusted odds ratio = 10.7; 95% CI, 4.1-27.8; p < 0.001). CONCLUSIONS: Preoperative BNP measurement is a strong, independent, and more accurate predictor of adverse outcome than EuroSCORE in patients undergoing cardiac surgery. BNP could be considered as a simple and objective tool for the detection of high-risk patients after cardiac surgery.
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