Platelet reactivity after clopidogrel treatment assessed with point-of-care analysis and early drug-eluting stent thrombosis.

Sibbing, D; Braun, S; Morath, T; Mehilli, J; Vogt, W; Schömig, A; Kastrati, A; von Beckerath, N

doi:10.1016/j.jacc.2008.11.030

2009

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Titel:: Platelet reactivity after clopidogrel treatment assessed with point-of-care analysis and early drug-eluting stent thrombosis.
Dokumenttyp:: Evaluation Studies; Journal Article; Multicenter Study; Article
Autor(en):: Sibbing, D; Braun, S; Morath, T; Mehilli, J; Vogt, W; Schömig, A; Kastrati, A; von Beckerath, N
Abstract:: OBJECTIVES: The aim of this prospective trial was to assess whether platelet reactivity to clopidogrel assessed with multiple electrode platelet aggregometry (MEA) correlates with the risk of early drug-eluting stent thrombosis (ST). BACKGROUND: Studies using light transmission aggregometry (LTA) have shown that insufficient suppression of platelet reactivity to adenosine diphosphate (ADP) after clopidogrel treatment is associated with an increased risk of adverse cardiovascular events after percutaneous coronary intervention (PCI). However, LTA is time- and labor-intensive and inconvenient for the routine. A point-of-care assay with similar predictive power would be of great value. METHODS: Between February 2007 and April 2008, a total of 1,608 consecutive patients with coronary artery disease and planned drug-eluting stent implantation were enrolled. Before PCI, all patients received 600 mg clopidogrel. Blood was obtained directly before PCI. The ADP-induced platelet aggregation was assessed in whole blood with MEA on a Multiplate analyzer (Dynabyte, Munich, Germany). The primary end point was definite ST at 30 days. RESULTS: The upper quintile of patients according to MEA measurements (n = 323) was defined as clopidogrel low responders. Compared with normal responders (n = 1,285), low responders had a significantly higher risk of definite ST within 30 days (2.2% vs. 0.2%; odds ratio [OR]: 9.4; 95% confidence interval [CI]: 3.1 to 28.4; p < 0.0001). Mortality rates were 1.2% in low versus 0.4% in normal responders (OR: 3.2; 95% CI: 0.9 to 11.1; p = 0.07). The composite of death or ST was higher in low versus normal responders (3.1% vs. 0.6%; OR: 5.1; 95% CI: 2.2 to 11.6; p < 0.001). CONCLUSIONS: Low response to clopidogrel assessed with MEA is significantly associated with an increased risk of ST. Further studies are warranted to evaluate the ability of MEA to guide antiplatelet therapy in patients undergoing PCI.
Zeitschriftentitel:: J Am Coll Cardiol
Jahr:: 2009
Band / Volume:: 53
Heft / Issue:: 10
Seitenangaben Beitrag:: 849-56
Sprache:: eng
Volltext / DOI:: doi:10.1016/j.jacc.2008.11.030
PubMed:: http://view.ncbi.nlm.nih.gov/pubmed/19264241
Print-ISSN:: 0735-1097
TUM Einrichtung:: I. Medizinische Klinik und Poliklinik (Kardiologie); Institut für Laboratoriumsmedizin (keine SAP-Zuordnung!)
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mediaTUM Gesamtbestand Einrichtungen Schools TUM School of Medicine and Health Departments Clinical Medicine Lehr- und Forschungskooperationen mit den Kliniken und Instituten am Deutschen Herzzentrum Institut für Laboratoriumsmedizin (DHM) (Prof. Holdenrieder)2009

mediaTUM Gesamtbestand Einrichtungen Schools TUM School of Medicine and Health Departments Clinical Medicine Klinik und Poliklinik für Innere Medizin I, Kardiologie (Prof. Laugwitz)2009