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Sökning: WFRF:(Jarolim P.)

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  • Eisen, A., et al. (författare)
  • High-Sensitivity Troponin I in Stable Patients with Atherosclerotic Disease in the TRA 2 degrees P - TIMI 50 Trial
  • 2017
  • Ingår i: Clinical Chemistry. - : Oxford University Press (OUP). - 0009-9147 .- 1530-8561. ; 63:1, s. 307-315
  • Tidskriftsartikel (refereegranskat)abstract
    • BACKGROUND: Cardiac troponin I, measured with a high-sensitivity assay (hs-TnI), is well-established for risk prediction in acute coronary syndromes. However, its prognostic role in stable atherosclerotic disease, particularly for future myocardial infarction (MI), is less well defined. METHODS: We measured hs-TnI (Abbott ARCHITECT) in 15 833 patients with prior MI, ischemic stroke, or peripheral arterial disease from the placebo controlled Thrombin Receptor Antagonist in Secondary Prevention of Atherothrombotic Ischemic Events (TRA 2 degrees P) Thrombolysis in Myocardial Infarction (TIMI) 50 trial of the platelet inhibitor vorapaxar, excluding patients with recent MI (<30 days). hs-TnI was categorized into 5 groups based on the detection limit (1.9 ng/L), 99th percentile reference limit (26 ng/L), and tertiles in between (1.9-26 ng/L), as well as sex-specific reference limits. RESULTS: Higher hs-TnI concentration was associated with older age, male sex, and increased atherosclerosis burden. hs-TnI identified a graded 3-year risk of cardiovascular death, MI, or stroke from 5.0% to 18.6% (P < 0.001), driven by cardiovascular death and MI (P < 0.001). This risk was independent of established clinical risk indicators, B-type natriuretic peptide and C-reactive protein [adjusted hazard ratio 2.70 (95% CI, 1.96-3.71), P < 0.001 for hs-TnI >26 ng/L vs <1.9 ng/L]. In patients with prior MI, there was a pattern of greater absolute benefit with vorapaxar in patients with an increased hs-TnI (absolute risk difference 1.9% with hs-TnI >26 ng/L vs 0.3% with hs-TnI <1.9 ng/L; P interaction = 0.82). CONCLUSIONS: In stable patients with established atherosclerosis, hs-TnI concentrations effectively stratified the risk of new or recurrent cardiovascular (CV) events, in particular CV death and MI. High-risk patients with prior MI identified by increased hs-TnI had a substantial absolute improvement in net clinical outcome with vorapaxar. (C) 2016 American Association for Clinical Chemistry
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  • Saenger, A. K., et al. (författare)
  • Multicenter analytical evaluation of a high-sensitivity troponin T assay
  • 2011
  • Ingår i: Clinica Chimica Acta. - : Elsevier BV. - 0009-8981 .- 1873-3492. ; 412:9-10, s. 748-754
  • Tidskriftsartikel (refereegranskat)abstract
    • Background: High-sensitivity cardiac troponin assays are being introduced clinically for earlier diagnosis of acute myocardial infarction (AMI). We evaluated the analytical performance of a high-sensitivity cardiac troponin T assay (hscTnT. Roche Diagnostics) in a multicenter, international trial. Methods: Three US and 5 European sites evaluated hscTnT on the Modular (R) Analytics E170, cobas (R) 6000, Elecsys 2010, and cobas (R) e 411. Precision, accuracy, reportable range, an inter-laboratory comparison trial, and the 99th percentile of a reference population were assessed. Results: Total imprecision (CVs) were 4.6-36.8% between 3.4 and 10.3 ng/L hscTnT. Assay linearity was up to 10,000 ng/L and the limit of blank and detection were 3 and 5 ng/L, respectively. The 99th percentile reference limit was 14.2 ng/L (n = 533). No significant differences between specimen types, assay incubation time, or reagent lots existed. A substantial positive bias (76%) exists between the 4th generation and hscTnT assays at the low end of the measuring range (< 50 ng/L). hscTnT serum pool concentrations were within 2SD limits of the mean of means in the comparison trial, indicating comparable results across multiple platforms and laboratories. Conclusion: The Roche hscTnT assay conforms to guideline precision requirements and will likely identify additional patients with myocardial injury suspicious for AMI.
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