Brain arterial dilatation and the risk of Alzheimer's disease

Jose Gutierrez, Vanessa Guzman, Farid Khasiyev, Jennifer Manly, Nicole Schupf, Howard Andrews, Richard Mayeux, Adam M. Brickman

Research output: Contribution to journalArticlepeer-review

24 Scopus citations

Abstract

Introduction: We tested the hypothesis that brain arterial dilatation increases the risk of Alzheimer's dementia (AD). Methods: We studied dementia-free participants in the Washington Heights-Inwood Columbia Aging Project who had a brain MRI and post-MRI dementia adjudication. We measured the axial T2-proton density diameters of the intracranial carotids and basilar diameters and used Cox models to obtain AD hazard ratios and 95% intervals. Results: Of 953 participants (mean age 77 ± 7 y, women 64%, 71% nonwhite)followed on average for 3 ± 3 years, 76 (8%)developed AD. In a model adjusted for demographics, vascular risks, apolipoprotein E (APOE)-ε4, and white matter hyperintensities, larger carotid diameters increased the risk of AD, defined categorically as ≥ 90th percentile (HR 4.34, 1.70–11.11)or continuously (HR 1.44 per SD, 1.07–1.94). Discussion: Understanding the pathophysiology of the association between AD and brain arterial dilatation may reveal new clues to the vascular contributions to AD.

Original languageEnglish (US)
Pages (from-to)666-674
Number of pages9
JournalAlzheimer's and Dementia
Volume15
Issue number5
DOIs
StatePublished - May 2019
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2019 the Alzheimer's Association

Keywords

  • Alzheimer's disease
  • Brain arterial diameters
  • Brain arterial dilatation
  • Carotid artery
  • Dementia
  • Dolichoectasia

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