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  • Title: Prognostic factors for pulmonary embolism: the prep study, a prospective multicenter cohort study.
    Author: Sanchez O, Trinquart L, Caille V, Couturaud F, Pacouret G, Meneveau N, Verschuren F, Roy PM, Parent F, Righini M, Perrier A, Lorut C, Tardy B, Benoit MO, Chatellier G, Meyer G.
    Journal: Am J Respir Crit Care Med; 2010 Jan 15; 181(2):168-73. PubMed ID: 19910608.
    Abstract:
    RATIONALE: The short-term prognosis of pulmonary embolism (PE) depends on hemodynamic status and underlying disease. The prognostic value of right ventricular dysfunction and injury is less well established. OBJECTIVES: To evaluate prognostic factors of PE in a multicenter prospective cohort study. METHODS: Echocardiography, brain natriuretic peptide (BNP), N-terminal-proBNP and cardiac troponin I measurements were done on admission of 570 consecutive patients with an acute PE. A predictive model was based on independent predictors of 30-day adverse events defined as death, secondary cardiogenic shock, or recurrent venous thromboembolism. MEASUREMENTS AND MAIN RESULTS: At 30 days, 42 patients (7.4%; 95% confidence interval [CI], 5.5-9.8%) had adverse events. On multivariate analysis, altered mental state (odds ratio [OR] 6.8; 95% confidence interval [CI], 2.0-23.3), shock on admission (OR 2.8; 95% CI, 1.1-7.5), cancer (OR 2.9; 95% CI, 1.2-6.9), BNP (OR 1.3 for an increase of 250 ng/L; 95% CI, 1.1-1.6) and right to left ventricle diameter ratio (OR 1.2 for an increase of 0.1; 95% CI, 1.1-1.4) were associated with 30-days of adverse events. The predictive performance of the model was good (area under receiver operating characteristics curve 0.84 [95% CI, 0.78-0.90]), making it possible to develop a bedside prognostic score. CONCLUSIONS: BNP and echocardiography may be useful determinants of the short-term outcome for patients with PE, together with clinical findings. Patients with PE can be stratified according to the initial risk of adverse outcome, using a simple score based on clinical, echocardiographic, and biochemical variables.
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