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The relationship between shear stress and flow‐mediated dilatation: implications for the assessment of endothelial function

Pyke, Kyra E., Tschakovsky, Michael E.·2005·The Journal of Physiology

Abstract

Endothelium‐dependent flow‐mediated dilatation (FMD) describes the vasodilatory response of a vessel to elevations in blood flow‐associated shear stress. Nitric oxide (NO), one of many vasoactive substances released by the endothelium in response to shear stress, is of particular interest to researchers as it is an antiatherogenic molecule, and a reduction in its bioavailability may play a role in the pathogenesis of vascular disease. The goal of many human studies is to create a shear stress stimulus that produces an NO‐dependent response in order to use the FMD measurements as an assay of NO bioavailability. The most common non‐invasive technique is the ‘reactive hyperaemia test’ which produces a large, transient shear stress profile and a corresponding FMD. Importantly, not all FMD is NO mediated and the stimulus creation technique is a critical determinant of NO dependence. The purpose of this review is to (1) explain that the mechanisms of FMD depend on the nature of the shear stress stimulus (stimulus response specificity), (2) provide an update to the current guidelines for FMD assessment, and (3) summarize the issues that surround the clinical utility of measuring both NO‐ and non‐NO‐mediated FMD. Future research should include (1) the identification and partitioning of mechanisms responsible for FMD in response to various shear stress profiles, (2) investigation of stimulus response specificity in coronary arteries, and (3) investigation of non‐NO FMD mechanisms and their connection to the development of vascular disease and occurrence of cardiovascular events.

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Metadata

Authors
Pyke, K. E., & Tschakovsky, M. E.
Venue
The Journal of Physiology
Publisher
Wiley
Published
2005-10
Volume
568
Issue
2
Pages
357-369
ISSN
  • 0022-3751 (ISSN-L)
  • 1469-7793
OpenAlex
W2120662805
Cited by
614
References
76
FWCI
21.85
Type
journal article
Language
en
Open access
closed

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CoChat. (2026). Citation check: The relationship between shear stress and flow‐mediated dilatation: implications for the assessment of endothelial function. https://app.cochat.ai/papers/10.1113/jphysiol.2005.089755
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Pyke, K. E., & Tschakovsky, M. E. (2005). The relationship between shear stress and flow‐mediated dilatation: implications for the assessment of endothelial function. The Journal of Physiology. https://doi.org/10.1113/jphysiol.2005.089755

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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).

Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.