Related Experiment Videos

Blood pressure levels before dementia

Diana B Petitti1, Valerie C Crooks, J Galen Buckwalter

  • 1Department of Research and Evaluation, Kaiser Permanente Southern California, 100 S. Los Robles, Pasadena, CA 91101, USA.

Archives of Neurology
|January 12, 2005
PubMed

Insights

Blood pressure (BP) decline, particularly diastolic BP, may precede dementia development. This study examined BP trends over 10 years in relation to cognitive status, finding significant declines in women who developed dementia.

Area of Science:

  • Neuroscience
  • Gerontology
  • Epidemiology

Background:

  • The relationship between blood pressure (BP) and dementia is complex and not fully understood.
  • Some research suggests that dementia may precede and influence BP levels.

Purpose of the Study:

  • To investigate the longitudinal association between blood pressure (BP) over a 10-year period and the prevalence of dementia.
  • To compare BP trajectories in individuals with and without cognitive impairment.

Main Methods:

  • A retrospective review of BP measurements from 965 participants in a health plan over 10 years prior to cognitive classification.
  • Participants were categorized into three groups: dementia (n=300), cognitive impairment (n=285), and unimpaired (n=585).
  • Longitudinal BP data (systolic and diastolic) were analyzed in relation to cognitive status.

Main Results:

  • Systolic BP increased over time in unimpaired individuals, with a blunted increase in women who developed cognitive impairment or dementia.
  • Diastolic BP significantly declined over time across all groups (P<.001).
  • Women who developed dementia exhibited a significantly greater adjusted rate of diastolic BP decline compared to unimpaired women (P = .04).

Conclusions:

  • The findings support the hypothesis that declining blood pressure, especially diastolic BP, may be a precursor to dementia.
  • The complex association between BP and dementia is influenced by factors such as age at data collection.
  • Future research should prioritize prospective data collection with participants free of cognitive impairment at enrollment for valid inferences.
Abstract

Related Concept Videos

Hypertension I: Introduction01:28

Hypertension I: Introduction

Hypertension is a widespread, long-term medical condition where blood pressure in the arteries remains elevated. It is characterized by systolic blood pressure readings of 130 mm Hg or above or diastolic blood pressure (DBP) readings of 80 mm Hg or higher. Unmanaged hypertension poses significant health risks, making the distinction between primary (or essential) hypertension and secondary hypertension crucial, as their management and implications vary.Primary HypertensionPrimary hypertension,...
Blood Pressure01:24

Blood Pressure

The movement of blood in a human body, commonly referred to as blood flow, is determined by the volume of blood that traverses a certain section of the bodily system per unit time. It is the rhythmic contraction of the heart's ventricles that primarily instigates this movement. As the ventricles contract, blood is forced into the prominent arteries, which then flow from areas of greater pressure to lower pressure areas. This movement continues into smaller arteries and arterioles and...
Blood Pressure01:30

Blood Pressure

Blood pressure (BP) is the pressure or force of blood exerted on the artery's walls as it circulates through the body. It is essential for maintaining blood flow throughout the body.
The average BP in an adult is typically around 120/80 mmHg (millimeters of mercury). In this measurement, the numerator (120) indicates the systolic pressure, which is the pressure in the arteries during the contraction of the heart's ventricles as blood is expelled. The denominator (80) represents the diastolic...
Alterations in Blood Pressure01:30

Alterations in Blood Pressure

Alterations in blood pressure, such as hypertension (high blood pressure) and hypotension (low blood pressure), significantly affect human health. Understanding these conditions' classifications, causes, and symptoms is essential for effective management and treatment.
Hypertension (High blood pressure)
Hypertension occurs when blood pressure readings consistently exceed the normal range. It is diagnosed when systolic blood pressure (the top number, indicating pressure while the heart beats)...
Special considerations while measuring blood pressure01:28

Special considerations while measuring blood pressure

When assessing blood pressure (BP), healthcare professionals must consider various factors and potential unexpected outcomes to ensure accurate readings and provide proper patient care. Adhering to these guidelines is essential to achieving the most reliable results.
Monitoring Both Arms:
Monitoring BP in both arms during the initial assessment is advisable, as the systolic value may differ by five to ten mm Hg between arms. For subsequent BP assessments, use the arm with the higher reading.
Pre-Procedural Guidelines for Assessing Blood Pressure01:10

Pre-Procedural Guidelines for Assessing Blood Pressure

Accurate blood pressure assessment is crucial for diagnosing and managing various health conditions. To ensure the reliability of these measurements, healthcare professionals must adhere to standardized pre-procedural guidelines. These guidelines enhance patient safety and improve the overall quality of healthcare. The following steps are essential for obtaining accurate and consistent blood pressure readings, from using the appropriate tools to ensuring effective communication with the patient.