Why the study?
To assess the feasibility and performance of the Turbulence index as a quantitative tool for carotid artery flow turbulence, and compare blood flow patterns of the CCA and CB at different ages and cardiac phases in healthy adults.
Does high-frame rate vector flow imaging reliably quantify blood flow turbulence in the carotid arteries of healthy adults?
Does high-frame rate vector flow imaging reliably quantify blood flow turbulence in the carotid arteries of healthy adults?
High-frame rate vector flow imaging provides a reliable quantitative method for assessing carotid blood flow turbulence, demonstrating significantly higher turbulence in the carotid bulb compared to the common carotid artery.
Tur index feasible for healthy carotid flow quantification; leaves open clinical utility pending validation in disease.
OBJECTIVES: To assess the feasibility and performance of Turbulence (Tur) index as a quantitative tool for carotid artery flow turbulence; to detect and compare the blood flow patterns of common carotid artery (CCA) and carotid bulb (CB) at different ages and cardiac phases in healthy adults, and thus interpret the evolvement of etiology difference between CCA and CB. METHODS: Carotid flow characteristics of 40 healthy volunteers were evaluated quantitatively by a high-frame rate vector flow imaging. Three types of flow patterns were defined depending on the distributive range of complex flow during systole in CB. Comparison of mean Tur value in CCA and CB at different age groups and cardiac phases was performed. And the correlation between Tur value and the diameter ratio of proximal internal carotid artery to common carotid artery (DRpro-ica/cca) was tested. RESULTS: Mean Tur values in CB were remarkably higher than that in CCA, whether during systole or diastole (P < .001). Meanwhile Tur values in CB during systole were significantly higher than that during diastole (P < .001). Flow complexity of CB showed variations among 40 participants especially in systole, whereas the flow pattern of CCA was relatively consistent. Mean Tur values were positively correlated with DRpro-ica/cca in CB (ρ = 0.69, P < .05). CONCLUSIONS: V Flow imaging provided a reliable method-Tur, for quantitative analysis of carotid blood flow. It had potential to be further applied in distinguishing complex hemodynamic characteristics in high-risk people of carotid diseases for the risk stratification of cardiovascular events.
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Dong et al. (2022) studied this question.