Is N-terminal pro B-type natriuretic peptide (NT-proBNP) a useful screening test for angiographic findings in patients with stable coronary disease?

Background Whether N-terminal pro B-type notriuretic peptide (NT-proBNP) is a useful screening tool for angiographic coronary artery disease in patients with angina is not known. Therefore, the purpose of this study was to assess the diagnostic test performance of NT-proBNP in detecting coronary atherosclerotic lesions, as assessed by coronary angiography. Methods We examined 1034 patients referred for diagnostic angiography because of symptoms or signs of coronary artery disease. The diagnostic value of NT-proBNP in predicting clinically significant coronary disease was assessed. Results in a multiple logistic regression model, NT-proBNP above the upper normal lit-nit (125 pg/mL) predicted clinically significant coronary disease at angiography independently of traditional cardiovascular risk factors and invasive measurements of left ventricular function (odds ratio 2.1, 95% Cl 1.3-3.2, P = .001). The ability of NT-proBNP in detecting clinically significant coronary disease at angiography was modest, however, with sensitivity of 0.61, specificity 0.60, accuracy 61 (95% Cl 58-64), positive likelihood ratio 1.5 (95% Cl 1.3-1.8), negative likelihood ratio 0.7 (95% Cl 0.6-0.8), and area under the ROC curve 0.61 (95% Cl 0.58-0.64). Conclusions NT-proBNP is associated with clinically significant coronary disease at angiography, independently of left ventricular dysfunction. However, NT-proBNP is not a useful screening test for diagnosing significant angiographic lesions in patients with stable coronary disease.