Journal article
Structural MRI markers of brain aging early after ischemic stroke
- Abstract:
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Objective: To examine associations between ischemic stroke, vascular risk factors, and MRI markers of brain aging.
Methods: Eighty-one patients (mean age 67.5 ± 13.1 years, 31 left-sided, 61 men) with confirmed first-ever (n = 66) or recurrent (n = 15) ischemic stroke underwent 3T MRI scanning within 6 weeks of symptom onset (mean 26 ± 9 days). Age-matched controls (n = 40) completed identical testing. Multivariate regression analyses examined associations between group membership and MRI markers of brain aging (cortical thickness, total brain volume, white matter hyperintensity [WMH] volume, hippocampal volume), normalized against intracranial volume, and the effects of vascular risk factors on these relationships.
Results: First-ever stroke was associated with smaller hippocampal volume (p = 0.025) and greater WMH volume (p = 0.004) relative to controls. Recurrent stroke was in turn associated with smaller hippocampal volume relative to both first-ever stroke (p = 0.017) and controls (p = 0.001). These associations remained significant after adjustment for age, sex, education, and, in stroke patients, infarct volume. Total brain volume was not significantly smaller in first-ever stroke patients than in controls (p = 0.056), but the association became significant after further adjustment for atrial fibrillation (p = 0.036). Cortical thickness and brain volumes did not differ as a function of stroke type, infarct volume, or etiology.
Conclusions: Brain structure is likely to be compromised before ischemic stroke by vascular risk factors. Smaller hippocampal and total brain volumes and increased WMH load represent proxies for underlying vascular brain injury.
- Publication status:
- Published
- Peer review status:
- Peer reviewed
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(Preview, Version of record, 750.9KB, Terms of use)
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- Publisher copy:
- 10.1212/wnl.0000000000004086
Authors
- Publisher:
- Wolters Kluwer Health, Inc.
- Journal:
- Neurology More from this journal
- Volume:
- 89
- Issue:
- 2
- Pages:
- 116-124
- Place of publication:
- United States
- Publication date:
- 2017-06-09
- Acceptance date:
- 2017-03-16
- DOI:
- EISSN:
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1526-632X
- ISSN:
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0028-3878
- Pmid:
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28600458
- Language:
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English
- Keywords:
- Pubs id:
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701417
- Local pid:
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pubs:701417
- Deposit date:
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2020-07-10
Terms of use
- Copyright holder:
- Werden et al.
- Copyright date:
- 2017
- Rights statement:
- © 2017 The Author(s). Published by Wolters Kluwer Health, Inc. on behalf of the American Academy of Neurology. This is an open access article distributed under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives License 4.0 (CC BY-NC-ND)
- Licence:
- CC Attribution-NonCommercial-NoDerivatives (CC BY-NC-ND)
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