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Comparison of effects of bare metal versus drug-eluting stent implantation on biomarker levels following percutaneous coronary intervention for non-ST-elevation acute coronary syndrome

Comparison of effects of bare metal versus drug-eluting stent implantation on biomarker levels following percutaneous coronary intervention for non-ST-elevation acute coronary syndrome

American Journal of Cardiology 97(10): 1473-1477

Drug-eluting stents (DESs) deliver biphasic (early and late) elution of anti-inflammatory compounds. We therefore hypothesized that DESs would be associated with early reductions in inflammatory biomarker release after percutaneous coronary intervention (PCI). A total of 741 patients with non-ST-elevation acute coronary syndrome underwent PCI in the Randomized Trial to Evaluate the Relative PROTECTion against Post-PCI Microvascular Dysfunction and Post-PCI Ischemia among Anti-Platelet and Anti-Thrombotic Agents (PROTECT) Thrombolysis In Myocardial Infarction 30 study of eptifibatide and reduced-dose antithrombin compared with bivalirudin. Serial biomarkers C-reactive protein, troponin, creatine kinase-MB, soluble CD40 ligand, interleukin-6, prothrombin fragment F1.2, and RANTES (regulated on activation, normal T-cell expressed and secreted) were assessed through 24 hours after PCI. DES use was at the investigator's discretion. Patients treated with DESs (n = 665) versus bare metal stents (n = 139) were more likely to have patent arteries before PCI (92.0% vs 86.6%, p = 0.04), Thrombolysis In Myocardial Infarction myocardial perfusion grade 3 (57.9% vs 47.7%, p = 0.033), and the left anterior descending artery as the culprit artery (38.5% vs 18.3%, p <0.001). The increase in C-reactive protein and troponin was lower among patients undergoing DES implantation (median 2.1 vs 3.5 mg/L for C-reactive protein, median 0.11 vs 0.41 ng/ml for troponin), even after adjustment for randomized treatment, clopidogrel before treatment, diabetes mellitus status, epicardial patency, left anterior descending artery location, and myocardial perfusion (p = 0.036 and p = 0.039, respectively). Interleukin-6 was lower with DESs on univariate analysis but not multivariate analysis. Creatine kinase-MB, soluble sCD40 ligand, prothrombin fragment F1.2, and RANTES did not differ by DES use. In conclusion, patients undergoing DES implantation achieved more reductions in periprocedural markers of inflammation and necrosis than patients receiving bare metal stents among those with non-ST-elevation acute coronary syndrome.

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Accession: 011883442

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PMID: 16679086

DOI: 10.1016/j.amjcard.2005.12.037

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