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Updated: Jun 7, 2026

Ultrasound Assessment of Endothelial-Dependent Flow-Mediated Vasodilation of the Brachial Artery in Clinical Research
Published on: October 22, 2014
Association between brachial-ankle pulse wave velocity and endothelium-dependent and -independent coronary vasomotor
Tomohide Yoshino1, Ichiro Nakae, Tetsuya Matsumoto
1Departments of Cardiovascular and Respiratory Medicine, Shiga University of Medical Science, Seta, Otsu, Japan.
Insights
Increased brachial-ankle pulse wave velocity (baPWV) is linked to impaired coronary blood vessel function. This non-invasive measure may help assess cardiovascular risk, especially in diabetic individuals.
Area of Science:
- Cardiovascular Medicine
- Vascular Physiology
- Diagnostic Imaging
Background:
- Coronary endothelial function and brachial-ankle pulse wave velocity (baPWV) are established predictors of cardiovascular events.
- Understanding the interplay between vascular stiffness (baPWV) and coronary vasodilatory capacity is crucial for risk stratification.
Purpose of the Study:
- To investigate the relationship between baPWV and both endothelium-dependent and -independent coronary vasodilatory functions.
- To assess the clinical utility of baPWV in evaluating coronary vascular health.
Main Methods:
- Sixty-five patients without significant coronary stenosis underwent baPWV measurement.
- Coronary blood flow (CBF) and epicardial coronary artery diameter changes were assessed after intracoronary administration of bradykinin (endothelium-dependent), nitroglycerin, and papaverine (endothelium-independent).
Main Results:
- A significant inverse correlation was observed between baPWV and coronary artery diameter/CBF responses to bradykinin, nitroglycerin, and papaverine.
- Multivariate analysis identified diabetes as an independent predictor associated with higher baPWV and impaired coronary vasodilation.
Conclusions:
- Elevated baPWV is associated with both endothelial-dependent and -independent coronary vasodilatory dysfunction.
- baPWV serves as a valuable, non-invasive tool for assessing coronary risk factors, particularly in diabetic patients.
Abstract:
1. Coronary endothelial function and brachial-ankle pulse wave velocity (baPWV) are independent predictors of cardiovascular events. Thus, in the present study we examined the relationship between baPWV and endothelium-dependent and -independent coronary vasodilatory functions. 2. Sixty-five patients (12 diabetic and 53 non-diabetic) with no significant stenosis of the coronary artery were studied and baPWV determined. After cardiac catheterization, graded doses of bradykinin (BK; 0.2, 0.6 and 2.0 μg/min), nitroglycerin (NTG; 250 μg) and papaverine (Pa; 12 mg) were administered into the left anterior descending coronary artery. Coronary blood flow (CBF) was measured using a Doppler flow wire. 3. In the 65 patients, an inverse correlation was found between baPWV and the percentage change in epicardial coronary artery diameter (Δ%CoD), as well as the percentage change in CBF (Δ%CBF), following administration of BK (endothelium-dependent vasodilator). Moreover, inverse correlations were found between baPWV and Δ%CoD following administration of NTG (endothelium-independent vasodilator) and Δ%CBF following administration of Pa (endothelium-independent vasodilator). 4. Multivariate analysis revealed diabetes to be independently and significantly associated with baPWV, BK-induced Δ%CBF and Δ%CoD and Pa-induced Δ%CBF. 5. In conclusion, the results of the present study suggest that increased baPWV is associated with endothelium-dependent and -independent coronary vasodilatory dysfunction. Non-invasive and straightforward baPWV measurement may be useful for the assessment of coronary risk factors, particularly in diabetic patients.
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