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Hypertension and cognition.

Ingmar Skoog1

  • 1Institute of Clinical Neuroscience, Section of Psychiatry, Sahlgrenska Hospital, Göteborg University, Göteborg, Sweden. Ingmar.Skoog@neuro.gu.se

International Psychogeriatrics
|September 30, 2005
PubMed
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High blood pressure is a risk factor for dementia and Alzheimer's disease (AD). Managing hypertension may significantly reduce dementia prevalence, despite complex associations between blood pressure and AD progression.

Area of Science:

  • Neurology
  • Cardiovascular Science
  • Gerontology

Background:

  • Hypertension is a known risk factor for cerebrovascular diseases, including stroke, white-matter lesions, and vascular dementia.
  • Elevated blood pressure is increasingly recognized as a potential precursor to Alzheimer's disease (AD) pathology, though paradoxically, blood pressure often declines in the years preceding dementia onset.
  • The relationship between hypertension and AD neuropathology is complex and not fully understood, necessitating further investigation into underlying mechanisms.

Purpose of the Study:

  • To explore the intricate relationship between hypertension and Alzheimer's disease (AD).
  • To investigate the potential mechanisms linking high blood pressure to AD pathogenesis and dementia.
  • To assess the impact of hypertension management on the overall burden of dementia.

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Main Methods:

  • This study synthesizes existing research on hypertension and its association with neurological disorders.
  • It reviews epidemiological data linking blood pressure trajectories to dementia onset and progression.
  • The analysis considers potential pathophysiological mechanisms connecting hypertension, cerebrovascular disease, and AD.

Main Results:

  • Hypertension is consistently linked to increased risk of stroke, vascular dementia, and potentially Alzheimer's disease.
  • A complex pattern emerges where high blood pressure may precede AD by decades, yet decrease closer to dementia diagnosis.
  • Hypertension may exacerbate AD by promoting cerebrovascular damage or share common underlying pathogenic pathways with AD.

Conclusions:

  • The interplay between hypertension and AD is multifaceted, involving potential acceleration of AD by hypertensive cerebrovascular damage.
  • Shared biological mechanisms may underlie both hypertension and AD pathogenesis.
  • Effective management of hypertension presents a significant public health opportunity to reduce the global incidence of dementia and AD.