The Role of Ultrasound Shear Wave Dispersion Imaging in Evaluating Carotid Viscoelasticity:A Preliminary Study

doi:10.37015/AUDT.2019.190816

Abstract

Abstract:

Objective: To evaluate the carotid viscoelasticity using ultrasound shear wave dispersion imaging (USWD) and determine its feasibility.

Methods: Forty-five volunteers were recruited and divided into the group1 (≥50 years old) and group 2 (<50 years old). The shear wave elastic modulus (SWE-A_R and SWE-P_R) and shear wave dispersion indexes (SWD-A_R and SWD-P_R), which located at the anterior and posterior walls of the common carotid artery (CCA), were obtained by USWD, and compared with pulse wave velocity (PWV). Pearson correlation analysis was applied to analyze the related factors of viscoelasticity.

Results: Before and after body mass index, systolic blood pressure (SBP) and diastolic blood pressure (DBP) were adjusted, SWE-A_R, SWE-P_R, SWD-A_R and SWD-P_R were all higher in the group 2 than those of group 1 (all P < 0.05). In all subjects, SWE was negatively correlated with age, SBP, DBP and PWV, respectively (r = -0.282, -0.374, -0.321, -0.256 and all P < 0.05). The SWD was negatively correlated with PWV in the group 1, while positively correlated with SBP in the group 2 (r=-0.393 and r=0.366, all P < 0.05).

Conclusion: The viscoelasticity of arterial wall can be assessed by USWD. It provides a new way to describe arterial disease for clinical study.

Key words: Shear wave dispersion; Carotid artery; Pulse wave velocity; Viscoelasticity

Xianghong Luo, MD, Jianhui Zhang, MD, Sihui Shao, MD, Min Yan, MD, Rong Wu, MD, Lianfang Du, MD, Zhaojun Li, MD. The Role of Ultrasound Shear Wave Dispersion Imaging in Evaluating Carotid Viscoelasticity:A Preliminary Study. Advanced Ultrasound in Diagnosis and Therapy, 2019, 3(3): 97-102.

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