Shear Wave Dispersion Imaging for Measuring Carotid Elasticity and Viscosity

doi:10.37015/AUDT.2021.200071

Abstract

Abstract:

Objective: To assess the viscoelasticity of the carotid artery using shear wave dispersion Imaging and to determine the relevant factors.
Methods: Ninety volunteers were recruited and divided into elder group and young group. Shear wave dispersion (SWD) imaging was applied to measure carotid viscoelasticity. The other arterial parameters, including arterial pulse wave velocity (PWV), inner diameter (CD), intima-medium thickness (CIMT), peak systolic velocity (PSV), mean flow velocity (MFV), and velocity time integral (VTI) of the common carotid artery (CCA) were also recorded by using ultrasound measurement.
Results: Measurements showed the SWD were lower, while CD, CIMT and PWV were higher in the elder group than those of young group. However, SWD was negatively correlated with VTI, and PSV respectively (r = -0.492 and -0.533, all P < 0.05). SWD was also positively correlated with MFV (r = 0.354, P < 0.05). In elder group, SWD was negatively correlated with PSV and PWV, respectively (r = -0.372 and -0.422, all P < 0.05) while in young group, SWD positively correlated with CD, CIMT and MFV (r = 0.531, 0.462 and 0.479 respectively, and all P < 0.05).
Conclusion: SWD imaging shown relationship with ultrasound parameters of carotid artery and has a potential for assessment of arterial viscoelasticity.

Key words: Shear wave dispersion; Viscoelasticity; Carotid artery; Ultrasound

Zhaojun Li, MD, PhD, Cuiqin Shen, MS, Qingqing Chen, MB, Lei Sha, MB, Xianghong Luo, MD, PhD, Lianfang Du, MD, PhD. Shear Wave Dispersion Imaging for Measuring Carotid Elasticity and Viscosity. Advanced Ultrasound in Diagnosis and Therapy, 2022, 6(1): 14-21.

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