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Multicenter Study
Validation of N-terminal pro-brain natriuretic peptide cut-off values for risk stratification of pulmonary embolism.
- Mareike Lankeit, David Jiménez, Maciej Kostrubiec, Claudia Dellas, Katherina Kuhnert, Gerd Hasenfuß, Piotr Pruszczyk, and Stavros Konstantinides.
- Center for Thrombosis and Hemostasis (CTH), University Medical Center Mainz, Johannes Gutenberg University of Mainz, Mainz Dept of Cardiology and Pneumology, Heart Center of the Georg August University of Goettingen, Goettingen, Germany mareike.lankeit@unimedizin-mainz.de.
- Eur. Respir. J. 2014 Jun 1;43(6):1669-77.
AbstractThe optimal N-terminal pro-brain natriuretic peptide (NT-proBNP) cut-off value for risk stratification of pulmonary embolism remains controversial. In this study we validated and compared different proposed NT-proBNP cut-off values in 688 normotensive patients with pulmonary embolism. During the first 30 days, 28 (4.1%) patients reached the primary outcome (pulmonary embolism-related death or complications) and 29 (4.2%) patients died. Receiver operating characteristic analysis yielded an area under the curve of 0.70 (0.60-0.80) for NT-proBNP. A cut-off value of 600 pg·mL(-1) was associated with the best prognostic performance (sensitivity 86% and specificity 50%) and the highest odds ratio (6.04 (95% CI 2.07-17.59), p=0.001) compared to the cut-off values of 1000, 500 or 300 pg·mL(-1). Using multivariable logistic regression analysis, NT-proBNP ≥ 600 pg·mL(-1) had a prognostic impact on top of that of the simplified Pulmonary Embolism Severity Index and right ventricular dysfunction on echocardiography (OR 4.27 (95% CI 1.22-15.01); p=0.024, c-index 0.741). The use of a stepwise approach based on the simplified Pulmonary Embolism Severity Index, NT-proBNP ≥ 600 pg·mL(-1) and echocardiography helped optimise risk assessment. Our findings confirm the prognostic value of NT-proBNP and suggest that a cut-off value of 600 pg·mL(-1) is most appropriate for risk stratification of normotensive patients with pulmonary embolism. NT-proBNP should be used in combination with a clinical score and an imaging procedure for detecting right ventricular dysfunction.©ERS 2014.
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