Normalizing Flow-Mediated Dilation to Shear Stress
Author Information
Author(s): Jaume Padilla, Blair D. Johnson, Sean C. Newcomer, Daniel P. Wilhite, Timothy D. Mickleborough, Alyce D. Fly, Kieren J. Mather, Janet P. Wallace
Primary Institution: Indiana University
Hypothesis
Normalization of FMD to SSAUC eliminates the influences of variable shear stress found among populations.
Conclusion
Normalization of FMD to SSAUC eliminates the influences of variable shear stress and solidifies the utility of the FMD:SSAUC ratio as an index of endothelial function.
Supporting Evidence
- The study demonstrated distinct magnitudes of occlusion-induced ischemia and hyperemic shear stress.
- Differences in peak FMD were abolished when normalizing FMD to SSAUC.
- The findings support the utility of the FMD:SSAUC ratio as a more accurate index of endothelial function.
Takeaway
This study shows that when we measure how blood vessels widen, normalizing the results helps us get a clearer picture of how healthy the blood vessels are, regardless of different blood flow conditions.
Methodology
The study involved 20 healthy young adults undergoing different durations of forearm cuff occlusion to measure flow-mediated dilation and shear stress.
Potential Biases
Potential carry-over effects from repeated measures on the same day.
Limitations
The study was conducted on a small sample of healthy individuals, which may limit the generalizability of the findings to clinical populations.
Participant Demographics
20 healthy, physically active young adults (10 men, 10 women) aged 25.3 ± 0.6 years.
Statistical Information
P-Value
p = 0.785
Statistical Significance
p<0.0001
Digital Object Identifier (DOI)
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