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Original Article
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Volume 345:1014-1021 October 4, 2001 Number 14
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The Prognostic Value of B-Type Natriuretic Peptide in Patients with Acute Coronary Syndromes
James A. de Lemos, M.D., David A. Morrow, M.D., M.P.H., Jane H. Bentley, B.Sc., Torbjorn Omland, M.D., Ph.D., M.P.H., Marc S. Sabatine, M.D., Carolyn H. McCabe, B.S., Christian Hall, M.D., Ph.D., Christopher P. Cannon, M.D., and Eugene Braunwald, M.D.

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ABSTRACT

Background Brain (B-type) natriuretic peptide is a neurohormone synthesized predominantly in ventricular myocardium. Although the circulating level of this neurohormone has been shown to provide independent prognostic information in patients with transmural myocardial infarction, few data are available for patients with acute coronary syndromes in the absence of ST-segment elevation.

Methods We measured B-type natriuretic peptide in plasma specimens obtained a mean (±SD) of 40±20 hours after the onset of ischemic symptoms in 2525 patients from the Orbofiban in Patients with Unstable Coronary Syndromes–Thrombolysis in Myocardial Infarction 16 study.

Results The base-line level of B-type natriuretic peptide was correlated with the risk of death, heart failure, and myocardial infarction at 30 days and 10 months. The unadjusted rate of death increased in a stepwise fashion among patients in increasing quartiles of base-line B-type natriuretic peptide levels (P<0.001). This association remained significant in subgroups of patients who had myocardial infarction with ST-segment elevation (P=0.02), patients who had myocardial infarction without ST-segment elevation (P<0.001), and patients who had unstable angina (P<0.001). After adjustment for independent predictors of the long-term risk of death, the odds ratios for death at 10 months in the second, third, and fourth quartiles of B-type natriuretic peptide were 3.8 (95 percent confidence interval, 1.1 to 13.3), 4.0 (95 percent confidence interval, 1.2 to 13.7), and 5.8 (95 percent confidence interval, 1.7 to 19.7). The level of B-type natriuretic peptide was also associated with the risk of new or recurrent myocardial infarction (P=0.01) and new or worsening heart failure (P<0.001) at 10 months.

Conclusions A single measurement of B-type natriuretic peptide, obtained in the first few days after the onset of ischemic symptoms, provides predictive information for use in risk stratification across the spectrum of acute coronary syndromes. Cardiac neurohormonal activation may be a unifying feature among patients at high risk for death after acute coronary syndromes.


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From the Thrombolysis in Myocardial Infarction Study Group, Boston (J.A.D., D.A.M., M.S.S., C.H.M., C.P.C., E.B.); the Donald W. Reynolds Cardiovascular Clinical Research Center, University of Texas, Southwestern Medical School, Dallas (J.A.D.); the Cardiovascular Division and Department of Medicine, Brigham and Women's Hospital, Boston (D.A.M., M.S.S., C.H.M., C.P.C., E.B.); the Nottingham Clinical Research Group, Nottingham, United Kingdom (J.H.B.); and the Research Institute for Internal Medicine, National Hospital, University of Oslo, Oslo, Norway (T.O., C.H.).

Address reprint requests to Dr. de Lemos at UT Southwestern Medical Center, 5323 Harry Hines Blvd., Rm. CS7.142, Dallas, TX 75390-9047, or at james.delemos{at}utsouthwestern.edu.

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