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Related Experiment Video

Updated: Jun 5, 2025

Implantation of Combined Telemetric ECG and Blood Pressure Transmitters to Determine Spontaneous Baroreflex Sensitivity in Conscious Mice
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Baroreflex Sensitivity and Long-Term Dementia Risk in Older Adults.

Yuan Ma1, Yiwen Zhang1, Rikuta Hamaya1,2

  • 1Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston, MA (Y.M., Y.Z., R.H., A.H.).

Hypertension (Dallas, Tex. : 1979)
|December 13, 2024
PubMed
Summary
This summary is machine-generated.

Reduced baroreflex sensitivity (BRS), a key blood pressure regulator, is linked to higher dementia risk in older adults not taking blood pressure medication. This finding suggests BRS may be a novel biomarker for dementia prevention.

Keywords:
Alzheimer diseasebaroreflexblood pressurecohort studiesdementiahypertension

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Area of Science:

  • Cardiovascular Physiology
  • Neuroscience
  • Gerontology

Background:

  • Elevated blood pressure variability is associated with increased dementia risk.
  • The role of baroreflex sensitivity (BRS), a crucial blood pressure stabilizing mechanism, in dementia risk remains unclear.

Purpose of the Study:

  • To investigate the association between cardiac baroreflex sensitivity (BRS) and the risk of developing dementia in older adults.
  • To determine if BRS is an independent predictor of dementia risk.

Main Methods:

  • Cardiac BRS was measured in 1819 older adults from the community-based Rotterdam Study using beat-to-beat blood pressure recordings.
  • Participants were followed for incident dementia and all-cause mortality over a median of 14.8 years.
  • Statistical analyses adjusted for average blood pressure and blood pressure variability.

Main Results:

  • A total of 421 participants developed dementia during follow-up.
  • Reduced BRS was significantly associated with an increased risk of dementia, but only in participants not using antihypertensive medications (aHR: 1.60, 95% CI: 1.07-2.40).
  • Reduced BRS was also linked to a higher risk of all-cause mortality (aHR: 1.76, 95% CI: 1.32-2.35).

Conclusions:

  • Impaired baroreflex sensitivity may contribute to hypertension-related brain damage and dementia risk.
  • BRS could serve as a novel biomarker for early dementia detection and prevention, particularly in individuals with hypertension.
  • These findings highlight the importance of BRS beyond conventional blood pressure measures in assessing dementia risk.