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Assessment of platelet function in patients with stroke using multiple electrode platelet aggregometry: a prospective observational study

BACKGROUND: There is a link between high on-treatment platelet reactivity (HPR) and adverse vascular events in stroke. This study aimed to compare multiple electrode platelet aggregometry (MEA), in healthy subjects and ischaemic stroke patients, and between patients naive to antiplatelet drugs (AP)...

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Autores principales: Sabra, Ahmed, Stanford, Sophia N., Storton, Sharon, Lawrence, Matthew, D’Silva, Lindsay, Morris, Roger H. K., Evans, Vanessa, Wani, Mushtaq, Potter, John F., Evans, Phillip A.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: BioMed Central 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5148854/
https://www.ncbi.nlm.nih.gov/pubmed/27938345
http://dx.doi.org/10.1186/s12883-016-0778-x
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author Sabra, Ahmed
Stanford, Sophia N.
Storton, Sharon
Lawrence, Matthew
D’Silva, Lindsay
Morris, Roger H. K.
Evans, Vanessa
Wani, Mushtaq
Potter, John F.
Evans, Phillip A.
author_facet Sabra, Ahmed
Stanford, Sophia N.
Storton, Sharon
Lawrence, Matthew
D’Silva, Lindsay
Morris, Roger H. K.
Evans, Vanessa
Wani, Mushtaq
Potter, John F.
Evans, Phillip A.
author_sort Sabra, Ahmed
collection PubMed
description BACKGROUND: There is a link between high on-treatment platelet reactivity (HPR) and adverse vascular events in stroke. This study aimed to compare multiple electrode platelet aggregometry (MEA), in healthy subjects and ischaemic stroke patients, and between patients naive to antiplatelet drugs (AP) and those on regular low dose AP. We also aimed to determine prevalence of HPR at baseline and at 3–5 days after loading doses of aspirin. METHODS: Patients with first ever ischaemic stroke were age and sex-matched to a healthy control group. Three venous blood samples were collected: on admission before any treatment given (baseline); at 24 h and 3–5 days after standard treatment. MEA was determined using a Mutliplate® analyser and agonists tested were arachidonic acid (ASPI), adenosine diphosphate (ADP) and collagen (COL). RESULTS: Seventy patients (mean age 73 years [SD 13]; 42 men, 28 women) were age and sex-matched to 72 healthy subjects. Thirty-three patients were on antiplatelet drugs (AP) prior to stroke onset and 37 were AP-naive. MEA results for all agonists were significantly increased in AP-naive patients compared to healthy subjects: ADP 98 ± 31 vs 81 ± 24, p < 0.005; ASPI 117 ± 31 vs 98 ± 27, p < 0.005; COL 100 ± 25 vs 82 ± 20, p < 0.005. For patients on long term AP, 33% (10/30) of patients were considered aspirin-resistant. At 3–5 days following loading doses of aspirin, only 11.1% were aspirin resistant based on an ASPI cut-off value of 40 AU*min. CONCLUSIONS: Many patients receiving low dose aspirin met the criteria of aspirin resistance but this was much lower at 3–5 days following loading doses of aspirin. Future studies are needed to establish the causes of HPR and potential benefits of individualizing AP treatment based on platelet function testing.
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spelling pubmed-51488542016-12-16 Assessment of platelet function in patients with stroke using multiple electrode platelet aggregometry: a prospective observational study Sabra, Ahmed Stanford, Sophia N. Storton, Sharon Lawrence, Matthew D’Silva, Lindsay Morris, Roger H. K. Evans, Vanessa Wani, Mushtaq Potter, John F. Evans, Phillip A. BMC Neurol Research Article BACKGROUND: There is a link between high on-treatment platelet reactivity (HPR) and adverse vascular events in stroke. This study aimed to compare multiple electrode platelet aggregometry (MEA), in healthy subjects and ischaemic stroke patients, and between patients naive to antiplatelet drugs (AP) and those on regular low dose AP. We also aimed to determine prevalence of HPR at baseline and at 3–5 days after loading doses of aspirin. METHODS: Patients with first ever ischaemic stroke were age and sex-matched to a healthy control group. Three venous blood samples were collected: on admission before any treatment given (baseline); at 24 h and 3–5 days after standard treatment. MEA was determined using a Mutliplate® analyser and agonists tested were arachidonic acid (ASPI), adenosine diphosphate (ADP) and collagen (COL). RESULTS: Seventy patients (mean age 73 years [SD 13]; 42 men, 28 women) were age and sex-matched to 72 healthy subjects. Thirty-three patients were on antiplatelet drugs (AP) prior to stroke onset and 37 were AP-naive. MEA results for all agonists were significantly increased in AP-naive patients compared to healthy subjects: ADP 98 ± 31 vs 81 ± 24, p < 0.005; ASPI 117 ± 31 vs 98 ± 27, p < 0.005; COL 100 ± 25 vs 82 ± 20, p < 0.005. For patients on long term AP, 33% (10/30) of patients were considered aspirin-resistant. At 3–5 days following loading doses of aspirin, only 11.1% were aspirin resistant based on an ASPI cut-off value of 40 AU*min. CONCLUSIONS: Many patients receiving low dose aspirin met the criteria of aspirin resistance but this was much lower at 3–5 days following loading doses of aspirin. Future studies are needed to establish the causes of HPR and potential benefits of individualizing AP treatment based on platelet function testing. BioMed Central 2016-12-09 /pmc/articles/PMC5148854/ /pubmed/27938345 http://dx.doi.org/10.1186/s12883-016-0778-x Text en © The Author(s). 2016 Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.
spellingShingle Research Article
Sabra, Ahmed
Stanford, Sophia N.
Storton, Sharon
Lawrence, Matthew
D’Silva, Lindsay
Morris, Roger H. K.
Evans, Vanessa
Wani, Mushtaq
Potter, John F.
Evans, Phillip A.
Assessment of platelet function in patients with stroke using multiple electrode platelet aggregometry: a prospective observational study
title Assessment of platelet function in patients with stroke using multiple electrode platelet aggregometry: a prospective observational study
title_full Assessment of platelet function in patients with stroke using multiple electrode platelet aggregometry: a prospective observational study
title_fullStr Assessment of platelet function in patients with stroke using multiple electrode platelet aggregometry: a prospective observational study
title_full_unstemmed Assessment of platelet function in patients with stroke using multiple electrode platelet aggregometry: a prospective observational study
title_short Assessment of platelet function in patients with stroke using multiple electrode platelet aggregometry: a prospective observational study
title_sort assessment of platelet function in patients with stroke using multiple electrode platelet aggregometry: a prospective observational study
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5148854/
https://www.ncbi.nlm.nih.gov/pubmed/27938345
http://dx.doi.org/10.1186/s12883-016-0778-x
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