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Kim JT, Heo SH, Choi KH, Nam TS, Choi SM, Lee SH, Park MS, Kim BC, Kim MK, Saver JL, Cho KH. Clinical Implications of Changes in Individual Platelet Reactivity to Aspirin Over Time in Acute Ischemic Stroke. Stroke 2015. [PMID: 26219647 DOI: 10.1161/strokeaha.115.009428] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
BACKGROUND AND PURPOSE Time-dependent changes in individual platelet reactivity have been detected in patients with coronary artery disease. Therefore, we sought to evaluate the time-dependent changes in platelet reactivity to aspirin during the acute stage after ischemic stroke and the clinical implications of variable patient responses to aspirin in acute ischemic stroke. METHODS We conducted a single-center, prospective, observational study. The acute aspirin reaction unit (ARU) was measured after 3 hours of aspirin loading, with higher values indicating increased platelet reactivity despite aspirin therapy. The follow-up ARU was measured on the fifth day of consecutive aspirin intake. The numeric difference between the follow-up ARU and the acute ARU was defined as ΔARU and was stratified into quartiles. Early neurological deterioration was regarded as an early clinical outcome. RESULTS Both the acute ARU (476±69 IU) and the follow-up ARU (451±68 IU) were measured in 349 patients in this study. Early neurological deterioration was observed in 72 patients (20.6%). Changes in aspirin platelet reactivity over time showed an approximately Gaussian distribution. The highest ΔARU quartile was independently associated with early neurological deterioration (odds ratio, 3.19; 95% confidence interval, 1.43-7.10; P=0.005) by multivariate logistic regression analysis. CONCLUSIONS The results of our study showed that the increase in platelet reactivity to aspirin over time is independently associated with early neurological deterioration in patients with acute ischemic stroke. In addition, during the acute stage of ischemic stroke, serial platelet reactivity assays may be more useful than a single assay for identifying the clinical implications of aspirin platelet reactivity after ischemic stroke.
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Affiliation(s)
- Joon-Tae Kim
- From the Department of Neurology, Chonnam National University Hospital, Gwangju, Korea (J.-T.K., K.-H.C., T.-S.N., S.-M.C., S.-H.L., M.-S.P., B.C.K., M.-K.K., K.-H.C.); Department of Radiology, Chonnam National University Hwasun Hospital, Hwasun, Korea (S.-H.H.); and Stroke Center and Department of Neurology, David Geffen School of Medicine, University of California, Los Angeles (J.L.S.).
| | - Suk-Hee Heo
- From the Department of Neurology, Chonnam National University Hospital, Gwangju, Korea (J.-T.K., K.-H.C., T.-S.N., S.-M.C., S.-H.L., M.-S.P., B.C.K., M.-K.K., K.-H.C.); Department of Radiology, Chonnam National University Hwasun Hospital, Hwasun, Korea (S.-H.H.); and Stroke Center and Department of Neurology, David Geffen School of Medicine, University of California, Los Angeles (J.L.S.)
| | - Kang-Ho Choi
- From the Department of Neurology, Chonnam National University Hospital, Gwangju, Korea (J.-T.K., K.-H.C., T.-S.N., S.-M.C., S.-H.L., M.-S.P., B.C.K., M.-K.K., K.-H.C.); Department of Radiology, Chonnam National University Hwasun Hospital, Hwasun, Korea (S.-H.H.); and Stroke Center and Department of Neurology, David Geffen School of Medicine, University of California, Los Angeles (J.L.S.)
| | - Tai-Seung Nam
- From the Department of Neurology, Chonnam National University Hospital, Gwangju, Korea (J.-T.K., K.-H.C., T.-S.N., S.-M.C., S.-H.L., M.-S.P., B.C.K., M.-K.K., K.-H.C.); Department of Radiology, Chonnam National University Hwasun Hospital, Hwasun, Korea (S.-H.H.); and Stroke Center and Department of Neurology, David Geffen School of Medicine, University of California, Los Angeles (J.L.S.)
| | - Seong-Min Choi
- From the Department of Neurology, Chonnam National University Hospital, Gwangju, Korea (J.-T.K., K.-H.C., T.-S.N., S.-M.C., S.-H.L., M.-S.P., B.C.K., M.-K.K., K.-H.C.); Department of Radiology, Chonnam National University Hwasun Hospital, Hwasun, Korea (S.-H.H.); and Stroke Center and Department of Neurology, David Geffen School of Medicine, University of California, Los Angeles (J.L.S.)
| | - Seung-Han Lee
- From the Department of Neurology, Chonnam National University Hospital, Gwangju, Korea (J.-T.K., K.-H.C., T.-S.N., S.-M.C., S.-H.L., M.-S.P., B.C.K., M.-K.K., K.-H.C.); Department of Radiology, Chonnam National University Hwasun Hospital, Hwasun, Korea (S.-H.H.); and Stroke Center and Department of Neurology, David Geffen School of Medicine, University of California, Los Angeles (J.L.S.)
| | - Man-Seok Park
- From the Department of Neurology, Chonnam National University Hospital, Gwangju, Korea (J.-T.K., K.-H.C., T.-S.N., S.-M.C., S.-H.L., M.-S.P., B.C.K., M.-K.K., K.-H.C.); Department of Radiology, Chonnam National University Hwasun Hospital, Hwasun, Korea (S.-H.H.); and Stroke Center and Department of Neurology, David Geffen School of Medicine, University of California, Los Angeles (J.L.S.)
| | - Byeong C Kim
- From the Department of Neurology, Chonnam National University Hospital, Gwangju, Korea (J.-T.K., K.-H.C., T.-S.N., S.-M.C., S.-H.L., M.-S.P., B.C.K., M.-K.K., K.-H.C.); Department of Radiology, Chonnam National University Hwasun Hospital, Hwasun, Korea (S.-H.H.); and Stroke Center and Department of Neurology, David Geffen School of Medicine, University of California, Los Angeles (J.L.S.)
| | - Myeong-Kyu Kim
- From the Department of Neurology, Chonnam National University Hospital, Gwangju, Korea (J.-T.K., K.-H.C., T.-S.N., S.-M.C., S.-H.L., M.-S.P., B.C.K., M.-K.K., K.-H.C.); Department of Radiology, Chonnam National University Hwasun Hospital, Hwasun, Korea (S.-H.H.); and Stroke Center and Department of Neurology, David Geffen School of Medicine, University of California, Los Angeles (J.L.S.)
| | - Jeffrey L Saver
- From the Department of Neurology, Chonnam National University Hospital, Gwangju, Korea (J.-T.K., K.-H.C., T.-S.N., S.-M.C., S.-H.L., M.-S.P., B.C.K., M.-K.K., K.-H.C.); Department of Radiology, Chonnam National University Hwasun Hospital, Hwasun, Korea (S.-H.H.); and Stroke Center and Department of Neurology, David Geffen School of Medicine, University of California, Los Angeles (J.L.S.)
| | - Ki-Hyun Cho
- From the Department of Neurology, Chonnam National University Hospital, Gwangju, Korea (J.-T.K., K.-H.C., T.-S.N., S.-M.C., S.-H.L., M.-S.P., B.C.K., M.-K.K., K.-H.C.); Department of Radiology, Chonnam National University Hwasun Hospital, Hwasun, Korea (S.-H.H.); and Stroke Center and Department of Neurology, David Geffen School of Medicine, University of California, Los Angeles (J.L.S.)
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