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N-terminal pro B-type natriuretic peptide in the early evaluation of suspected acute myocardial infarction. 2011

Philip Haaf, and Cathrin Balmelli, and Tobias Reichlin, and Raphael Twerenbold, and Miriam Reiter, and Julia Meissner, and Nora Schaub, and Claudia Stelzig, and Michael Freese, and Patricia Paniz, and Christophe Meune, and Beatrice Drexler, and Heike Freidank, and Katrin Winkler, and Willibald Hochholzer, and Christian Mueller
Department of Internal Medicine, University Hospital, Basel, Switzerland.

BACKGROUND Myocardial ischemia is a strong trigger of N-terminal pro-B-type natriuretic peptide (NT-proBNP) release. As ischemia precedes necrosis in acute myocardial infarction, we hypothesized that NT-proBNP might be useful in the early diagnosis and risk stratification of patients with suspected acute myocardial infarction. METHODS In a prospective multicenter study, NT-proBNP was measured at presentation in 658 consecutive patients with acute chest pain. The final diagnosis was adjudicated by 2 independent cardiologists. Patients were followed long term regarding mortality. RESULTS Acute myocardial infarction was the adjudicated final diagnosis in 117 patients (18%). NT-proBNP levels at presentation were significantly higher in acute myocardial infarction as compared with patients with other final diagnoses (median 886 pg/mL vs 135 pg/mL, P <.001). The diagnostic accuracy of NT-proBNP for acute myocardial infarction as quantified by the area under the receiver operating characteristic curve (AUC) was 0.79 (95% confidence interval [CI], 0.75-0.83). When added to cardiac troponin T, NT-proBNP significantly increased the AUC from 0.89 (95% CI, 0.84-0.93) to 0.91 (95% CI, 0.88-0.94; P=.033). Cumulative 24-month mortality rates were 0% in the first, 1.3% in the second, 8.3% in the third, and 23.3% in the fourth quartile of NT-proBNP (P <.001). NT-proBNP (AUC 0.85, 95% CI, 0.81-0.89) predicted all-cause mortality independently of and more accurately than both cardiac troponin T (AUC 0.66, 95% CI, 0.58-0.74; P <.001) and the Thrombolysis in Myocardial Infarction risk score (AUC 0.79, 95% CI, 0.74-0.84; P <.001). Net reclassification improvement (Thrombolysis in Myocardial Infarction vs additionally NT-proBNP) was 0.188 (P <.009), and integrated discrimination improvement was 0.100 (P <.001). CONCLUSIONS Use of NT-proBNP improves the early diagnosis and risk stratification of patients with suspected acute myocardial infarction.

UI MeSH Term Description Entries
D007391 International Cooperation The interaction of persons or groups of persons representing various nations in the pursuit of a common goal or interest. Foreign Aid,Treaties,Aid, Foreign,Cooperation, International,Treaty
D008297 Male Males
D008875 Middle Aged An adult aged 45 - 64 years. Middle Age
D009203 Myocardial Infarction NECROSIS of the MYOCARDIUM caused by an obstruction of the blood supply to the heart (CORONARY CIRCULATION). Cardiovascular Stroke,Heart Attack,Myocardial Infarct,Cardiovascular Strokes,Heart Attacks,Infarct, Myocardial,Infarction, Myocardial,Infarctions, Myocardial,Infarcts, Myocardial,Myocardial Infarctions,Myocardial Infarcts,Stroke, Cardiovascular,Strokes, Cardiovascular
D010446 Peptide Fragments Partial proteins formed by partial hydrolysis of complete proteins or generated through PROTEIN ENGINEERING techniques. Peptide Fragment,Fragment, Peptide,Fragments, Peptide
D011237 Predictive Value of Tests In screening and diagnostic tests, the probability that a person with a positive test is a true positive (i.e., has the disease), is referred to as the predictive value of a positive test; whereas, the predictive value of a negative test is the probability that the person with a negative test does not have the disease. Predictive value is related to the sensitivity and specificity of the test. Negative Predictive Value,Positive Predictive Value,Predictive Value Of Test,Predictive Values Of Tests,Negative Predictive Values,Positive Predictive Values,Predictive Value, Negative,Predictive Value, Positive
D011379 Prognosis A prediction of the probable outcome of a disease based on a individual's condition and the usual course of the disease as seen in similar situations. Prognostic Factor,Prognostic Factors,Factor, Prognostic,Factors, Prognostic,Prognoses
D011446 Prospective Studies Observation of a population for a sufficient number of persons over a sufficient number of years to generate incidence or mortality rates subsequent to the selection of the study group. Prospective Study,Studies, Prospective,Study, Prospective
D005260 Female Females
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man

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