Serial analyses of N-terminal pro-B-type natriuretic peptide in patients with nonST-segment elevation acute coronary syndromes
A Fragmin and fast Revascularisation during InStability in coronary artery disease (FRISC)-II substudy
Bertil Lindahl, MD, PhD*, ,*,
Johan Lindbäck, MSc ,
Tomas Jernberg, MD, PhD ,
Nina Johnston, MD*,
Mats Stridsberg, MD, PhD ,
Per Venge, MD, PhD and
Lars Wallentin, MD, PhD*,
* Department of Medical Sciences and Cardiology
Department of Medical Sciences and Clinical Chemistry
Uppsala Clinical Research Center, University Hospital, Uppsala, Sweden

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Figure 1 (A) Box-plots showing plasma levels of NT-proB-type natriuretic peptide (NT-proBNP) at randomization, day 2, 6 weeks, 3 and 6 months in patients with measurements at all five occasions (p < 0.001). (B) Box-plots showing plasma levels of NT-proBNP at randomization, day 2, 6 weeks, 3 and 6 months in all patients with measurements of NT-proBNP (p < 0.001).
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Figure 2 Box plots showing plasma levels of NT-proB-type natriuretic peptide (NT-proBNP) at randomization, day 2, 6 weeks, 3 and 6 months in patients: 1) without elevation of cardiac troponin T (TnT); 2) with elevation of cardiac TnT, but without elevated C-reactive protein (CRP); and 3) with elevation of both cardiac TnT and CRP. URL = upper reference level.
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Figure 3 (A) Percentage of patients (n = 1,123) with left ventricular ejection fraction (LV-EF) below 0.45 estimated by echocardiography before discharge in relation to tertiles of the NT-proB-type natriuretic peptide (NT-proBNP) levels at randomization and tertiles of the percentage decrease of NT-proBNP from randomization to day 2. (B) Percentage of patients with Thrombolysis In Myocardial Infarction (TIMI) flow grade 3 in the coronary arteries in patients randomized to the invasive strategy (n = 474) in relation to tertiles of the NT-proBNP levels at randomization and tertiles of the percentage decrease of NT-proBNP from randomization to day 2.
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Figure 4 (Left) Adjusted odds ratio (95% confidence interval) for death at two years for nonST-segment elevation acute coronary syndromes patients with elevated NT-proB-type natriuretic peptide (NT-proBNP) in relation to when NT-proBNP is measured. The odds ratio applies to a doubling of NT-proBNP level at each time point (e.g., an NT-proBNP level at inclusion of 800 ng/l vs. 400 ng/l is associated with a 1.4-fold higher risk of subsequent death, compared with a 1.9-fold higher risk for a similar increase in NT-proBNP level at six months). Adjustment is made for age, gender, diabetes, previous myocardial infarction, creatinine level, ST-segment depression, cardiac troponin T, and C-reactive protein elevation. (Right) Mortality from time of blood sample to end of follow-up at two years in relation to two different cut-offs of NT-proBNP. HC = high cut-off: 1,000 ng/l; URL = upper reference level: 184 ng/l for men and 268 ng/l for women.
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