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Intracranial artery stenosis and progression from mild cognitive impairment to Alzheimer disease

Jie Zhu1, Yanjiang Wang, Jing Li

  • 1From the Department of Neurology, Daping Hospital, Third Military Medical University, Chongqing, China.

Neurology
|February 4, 2014
PubMed
Abstract

Insights

Intracranial arterial stenosis accelerates cognitive decline in individuals with mild cognitive impairment (MCI), increasing the risk of developing Alzheimer disease (AD) dementia.

Area of Science:

  • Neurology
  • Neuroscience
  • Medical Imaging

Background:

  • Mild cognitive impairment (MCI) is a transitional stage between normal cognition and Alzheimer disease (AD).
  • Vascular factors, including intracranial arterial stenosis, may influence cognitive decline and dementia progression.

Purpose of the Study:

  • To investigate the association between intracranial arterial stenosis and the progression from MCI to AD dementia.
  • To evaluate the impact of stenosis severity on cognitive and functional decline in MCI patients.

Main Methods:

  • Longitudinal study of 423 MCI participants over 4 years with annual clinical and neuropsychological assessments.
  • CT angiography used to quantify intracranial arterial stenosis.
  • Mixed-effects regression and Cox proportional hazards models employed to analyze progression rates and dementia risk.

Main Results:

  • Participants with moderate or severe intracranial arterial stenosis showed faster cognitive and functional decline.
  • Intracranial arterial stenosis significantly elevated the risk of progressing to AD dementia.
  • These findings persisted after adjusting for demographic, vascular, and MRI lesion variables.

Conclusions:

  • Intracranial arterial stenosis is a significant risk factor for the progression from MCI to Alzheimer disease dementia.
  • Early identification and management of intracranial arterial stenosis may be crucial in preventing AD dementia.

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