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Vascular dementia: a construct in evolution

D W Desmond1

  • 1Department of Neurology, College of Physicians and Surgeons, Columbia University, New York, New York, USA.

Cerebrovascular and Brain Metabolism Reviews
|January 1, 1996
PubMed
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Cerebrovascular disease (CVD) is a significant cause of dementia, often overlooked. Research highlights its role alongside other factors in cognitive decline, emphasizing the need for better diagnosis and public health strategies.

Area of Science:

  • Neurology
  • Vascular Medicine
  • Public Health

Background:

  • The understanding of cerebrovascular disease (CVD) as a cause of dementia has evolved since the late 1800s.
  • While infarct characteristics are important, recent research indicates a combination of factors contribute to dementia, including white matter disease, vascular risk factors (e.g., diabetes), comorbid illnesses, genetics, and host characteristics.

Purpose of the Study:

  • To review the evolving understanding of cerebrovascular disease (CVD) as a basis for dementia.
  • To discuss the prevalence, incidence, and challenges in diagnosing vascular dementia (VaD).

Main Methods:

  • Literature review and synthesis of existing studies on CVD and dementia.
  • Analysis of factors contributing to dementia, including infarct characteristics, white matter disease, and vascular risk factors.

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  • Discussion of methodological challenges in VaD research, such as lesion characterization, cognitive assessment, and diagnosis.

    • Main Results:

    • CVD is a leading cause of dementia, second to Alzheimer's disease in Western countries and most common in some Asian countries.
    • Prevalence and incidence studies consistently show an elevated risk of dementia associated with CVD.
    • Underestimation of VaD frequency may occur due to lack of brain imaging and decreased survival in CVD patients.

    Conclusions:

    • Vascular dementia (VaD) remains a significant public health concern.
    • Methodological variability in research contributes to ongoing debate but does not negate the importance of CVD in dementia.
    • Further research is needed to address diagnostic challenges and improve understanding of VaD.