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Published in: Journal of Cardiovascular Translational Research 4/2017

Open Access 01-08-2017 | Original Article

Disaggregation Following Agonist-Induced Platelet Activation in Patients on Dual Antiplatelet Therapy

Authors: Patricia P. Wadowski, Beate Eichelberger, Christoph W. Kopp, Joseph Pultar, Daniela Seidinger, Renate Koppensteiner, Irene M. Lang, Simon Panzer, Thomas Gremmel

Published in: Journal of Cardiovascular Translational Research | Issue 4/2017

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Abstract

Disaggregation as the difference between maximal and final platelet aggregation by light transmission aggregometry indicates the stability of platelet aggregates. We evaluated the extent of disaggregation after platelet stimulation with adenosine diphosphate (ADP), arachidonic acid (AA), collagen, epinephrine, and thrombin receptor-activating peptide (TRAP)-6 in 323 patients on dual antiplatelet therapy with daily aspirin and clopidogrel (group 1), prasugrel (group 2), or ticagrelor (group 3) therapy. All patients in group 1 underwent elective angioplasty and stenting, whereas all patients included in groups 2 and 3 suffered from acute coronary syndromes (STEMI or NSTEMI) and underwent urgent PCI. Significant differences between maximal and final platelet aggregation were observed with all agonists throughout the groups (all p<0.001). Disaggregation was highest using AA (clopidogrel 36.5%; prasugrel/ticagrelor 100%) and ADP (clopidogrel 21.7%; prasugrel/ticagrelor 100%). In contrast, low disaggregation was observed after platelet stimulation with collagen and TRAP-6 in clopidogrel-treated patients, and after platelet stimulation with collagen and epinephrine in prasugrel- and ticagrelor-treated patients. In conclusion, pathways of platelet activation that are not inhibited by standard antiplatelet therapy allow persisting platelet aggregation and may at least in part be responsible for adverse ischemic events.
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Metadata
Title
Disaggregation Following Agonist-Induced Platelet Activation in Patients on Dual Antiplatelet Therapy
Authors
Patricia P. Wadowski
Beate Eichelberger
Christoph W. Kopp
Joseph Pultar
Daniela Seidinger
Renate Koppensteiner
Irene M. Lang
Simon Panzer
Thomas Gremmel
Publication date
01-08-2017
Publisher
Springer US
Published in
Journal of Cardiovascular Translational Research / Issue 4/2017
Print ISSN: 1937-5387
Electronic ISSN: 1937-5395
DOI
https://doi.org/10.1007/s12265-017-9746-0

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