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Chinese Journal of Medical Ultrasound (Electronic Edition) ›› 2021, Vol. 18 ›› Issue (01): 33-39. doi: 10.3877/cma.j.issn.1672-6448.2021.01.008

Special Issue:

• Peripheral Vascular Ultrasound • Previous Articles     Next Articles

Assessment of activity of Takayasu arteritis by contrast-enhanced ultrasonography

Ran Liu1, Jingzhi Li1, Mingyu Xia1, Xinyu Zhao1, Liyong Du1, Yang Hua1,()   

  1. 1. Department of Vascular Ultrasound, Xuanwu Hospital, Capital Medical University, Beijing, 100053, China
  • Received:2020-08-07 Online:2021-01-01 Published:2021-01-01
  • Contact: Yang Hua

Abstract:

Objective

To investigate the correlation between clinical activity and the enhancement of vessel wall acquired by contrast-enhanced ultrasound sonography (CEUS) in patients with Takayasu arteritis (TA), and to evaluate whether CEUS can be used to assess the disease activity of TA.

Methods

A total of 37 TA patients with 62 carotid arteries affected were enrolled form January 2019 to January 2020 retrospectively at Xuanwu Hospital of Capital Medical University. The patients were divided into either an active group (17 patients) or an inactive group (20 patients) for statistical analysis. Contrast-enhanced ultrasound combined with clinical manifestations and laboratory results were used to analyze the characteristics of carotid artery wall structure in the two groups, as well as the correlation of parameters of contrast-enhanced ultrasound and inflammatory factors.

Results

In the 37 patients, a total of 62 carotid arteries were involved, including 28 carotid arteries in the active group and 34 in the inactive group. Erythrocyte sedimentation rate (ESR) (Z=-2.12, P=0.03) and C-reactive protein (CRP) (t=2.54, P=0.02) in the active group were significantly higher than those in the inactive group.The carotid wall thickness (t=0.60, P=0.55) and stenotic severity (χ2=0.63, P=0.43) assessed had no significant difference between the two groups (P>0.05). The neovascularization detected by CEUS in the active group was significantly higher than that in the inactive group (χ2=10.42, P<0.01). The slope of CEUS time-intensity curve (Z=1.75, P<0.01), peak intensity (Z=1.62, P=0.03), and area under curve (Z=2.01, P<0.01) in the active group were significantly increased, and the time to peak (t=-4.24, P<0.01) in the active group was significantly shorter than that in the inactive group.CRP was positively correlated with slope (r=0.51, P<0.01), PI (r=0.49, P<0.01), and AUC (r=0.49, P<0.01), and negatively correlated with TTP (r=-0.63, P<0.01). ESR was also positively correlated with slope (r=0.51, P<0.01), PI (r=0.47, P<0.01) and AUC (r=0.55, P<0.01), and negatively correlated with TTP (r=-0.72, P<0.01).

Conclusion

The neovascularization assessed by CEUS is highly related to the TA activity, and peak intensity of CEUS is significantly correlated with inflammatory factors. CEUS could be used as an alternative imaging method to assess disease activity for TA patients, and can provide a basis for clinicians to formulate the best treatment plan.

Key words: Carotid arteries, Takayasu arteritis, Contrast-enhanced ultrasound

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