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Updated: Jul 26, 2026

Ultrasound Assessment of Endothelial-Dependent Flow-Mediated Vasodilation of the Brachial Artery in Clinical Research
Published on: October 22, 2014
Imaging of the endothelial dysfunction in coronary atherosclerosis
J T Kuikka1, O T Raitakari, K L Gould
1Department of Clinical Physiology and Nuclear Medicine, Kuopio University Hospital and Niuvanniemi Hospital, Finland. jkuikka@uku.fi
Insights
Coronary endothelial dysfunction, an early sign of atherosclerosis, can be detected non-invasively. Early detection enables interventions to prevent cardiovascular events and procedures like revascularisation.
Area of Science:
- Cardiovascular Medicine
- Medical Imaging
- Vascular Biology
Background:
- Coronary endothelial dysfunction involves vasoconstriction to vasodilators, indicating early coronary atherosclerosis.
- It is linked to coronary artery disease (CAD), benefiting from risk factor management over revascularisation.
- Early detection of vascular changes is crucial for preventing cardiovascular events.
Purpose of the Study:
- To review non-invasive methods for detecting coronary endothelial dysfunction and early atherosclerosis.
- To assess the utility of current technologies in identifying functional and anatomical vascular changes.
Main Methods:
- Review of non-invasive imaging techniques for assessing coronary vasculature.
- Evaluation of positron emission tomography (PET) and magnetic resonance imaging (MRI).
- Comparison with intracoronary ultrasonography as a benchmark.
Main Results:
- Non-invasive methods are increasingly important for identifying endothelial dysfunction.
- PET and MRI show growing significance in detecting early coronary atherosclerosis.
- Intracoronary ultrasonography remains the most accurate diagnostic method.
Conclusions:
- Early detection of coronary endothelial dysfunction is key for preventative strategies.
- Non-invasive imaging like PET and MRI are vital for identifying early atherosclerosis.
- Integrated management of risk factors is superior to revascularisation for patient outcomes.
Abstract:
Coronary endothelial dysfunction is characterised by coronary vasoconstrictive responses to endothelium-dependent vasodilators. It is associated with coronary artery disease (CAD) and is considered an early phase of coronary atherosclerosis. Patients with CAD benefit from vigorous risk factor interventions and medical treatment, with a marked decrease in coronary events and an improvement in survival that are not reported following revascularisation procedures. Therefore, early detection of anatomical and functional changes in the coronary vasculature due to atherosclerosis provides the basis for integrated pharmacological, dietary and lifestyle modifications to prevent cardiovascular events and revascularisation procedures. The question arises as to whether these alterations in regional myocardial tone can be detected by any of the current non-invasive methods. Several methods are reviewed. We consider that intracoronary ultrasonography is the most accurate method, but non-invasive positron emission tomography and magnetic resonance imaging technology is of growing importance for identifying endothelial dysfunction of early coronary atherosclerosis.
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