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Updated: Mar 11, 2026
08:42
Ultrasound Assessment of Endothelial-Dependent Flow-Mediated Vasodilation of the Brachial Artery in Clinical Research
Published on: October 22, 2014
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Both flow-mediated dilation and constriction are associated with changes in blood flow and shear
Tommaso Gori1, Urs von Henning1, Selina Muxel1
1Kardiologie I, Zentrum für Kardiologie und DZHK Standort Rhein-Main, Mainz, Germany.
Clinical Hemorheology and Microcirculation
|November 19, 2016
Summary
Changes in blood flow are key determinants of flow-mediated dilation (FMD) and low-flow mediated vasoconstriction (L-FMC). These endothelial function measures are influenced by blood flow, highlighting their role in shear-induced vasomotion.
Area of Science:
- Cardiovascular Physiology
- Endothelial Function Assessment
- Vascular Biology
Background:
- Flow-mediated dilation (FMD) assesses endothelium-dependent vasodilation in response to increased blood flow.
- Low-flow mediated vasoconstriction (L-FMC) is a newer measure of endothelial function, with less understood relationships to blood flow and cardiovascular risk factors.
- This study investigates FMD and L-FMC in patients with coronary artery disease.
Discussion:
- Blood flow changes are the primary drivers for both FMD and L-FMC.
- Both FMD and L-FMC reflect endothelium-dependent, shear-induced vasomotion.
- L-FMC is a significant predictor of FMD, even when accounting for blood flow variations.
Key Insights:
- Blood flow and shear rate show modest associations with FMD and L-FMC.
- Age, sex, and coronary artery disease extent strongly relate to endothelial function but explain limited variance.
- Incorporating blood flow changes significantly increases the explained variance for both FMD and L-FMC.
Outlook:
- Further research can explore the clinical utility of L-FMC in cardiovascular risk stratification.
- Understanding the interplay between blood flow dynamics and endothelial responses can refine cardiovascular health assessments.
- These findings support the use of FMD and L-FMC as complementary measures of vascular health.
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