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Related Concept Videos

Blood Studies for Cardiovascular System I: Cardiac Biomarkers01:20

Blood Studies for Cardiovascular System I: Cardiac Biomarkers

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Cardiac biomarkers are enzymes, proteins, and hormones released into the blood when cardiac cells are injured. They are powerful tools for triaging.
The essential diagnostic tools for detecting myocardial necrosis and monitoring individuals suspected of having acute coronary syndrome (ACS) include:
Troponins
Troponins, particularly cardiac troponins I and T, are the most precise and sensitive markers of myocardial injury. They are detectable within 4-6 hours of myocardial injury and remain...
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Blood Studies for Cardiovascular System II: CRP, Hcy, and Cardiac Natriuretic Peptide Markers01:19

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Cardiac biomarkers are critical in diagnosing, prognosing, and managing cardiovascular diseases. Routine measurement of specific biomarkers such as B-type natriuretic peptide (BNP), C-reactive protein (CRP), and homocysteine (Hcy) is common practice in clinical settings to evaluate heart function and predict cardiovascular events.
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Cardiac myocytes produce these hormones in response to ventricular stretching...
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Related Experiment Video

Updated: Jan 7, 2026

Dried Blood Spot Collection of Health Biomarkers to Maximize Participation in Population Studies
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Biomarkers.

Francesca M Chappell1, Roberto Duarte2, Maria Del C Valdes Hernandez3

  • 1Centre for Clinical Brain Sciences, University of Edinburgh, Edinburgh, Scotland, United Kingdom.

Alzheimer'S & Dementia : the Journal of the Alzheimer'S Association
|December 25, 2025
PubMed
Summary
This summary is machine-generated.

Enlarged perivascular spaces (PVS) visible on MRI are linked to lower cognitive performance in adults. Higher PVS volumes may predict cognitive decline, highlighting their impact on brain health.

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Area of Science:

  • Neuroimaging and Cognitive Science
  • Vascular Neurology
  • Aging Research

Background:

  • Perivascular spaces (PVS) are fluid-filled spaces surrounding blood vessels in the brain.
  • Enlarged PVS are detectable via magnetic resonance imaging (MRI) and associated with aging and cerebrovascular disease.
  • The link between PVS volume and cognitive function in adults is not well understood.

Purpose of the Study:

  • To investigate the association between PVS volumes and cognitive performance in adults.
  • To determine if PVS volume predicts cognitive decline over time.

Main Methods:

  • Utilized MRI and cognitive data from 14 cohorts.
  • Computed PVS volumes in basal ganglia (BG-PVS) and white matter (CSO-PVS).
  • Conducted cross-sectional and longitudinal meta-analyses using mixed-effects models and logistic regression.

Main Results:

  • Higher PVS volumes correlated with lower cognitive scores across studies, even after adjustments.
  • A 10% increase in CSO-PVS volume was associated with a 2% decrease in cognitive score.
  • Elevated PVS volumes predicted increased likelihood of cognitive impairment in longitudinal analyses, though with population variability.

Conclusions:

  • MRI-visible PVS volume is implicated in cognitive decline related to aging, vascular, and neurodegenerative processes.
  • Further longitudinal studies are required to solidify these associations.
  • Exploring alternative PVS measures may offer greater sensitivity to cognitive decline.