Value of the circumferential strain of the blood vessel in estimating the carotid arterial elasticity of the patients with hypertension
10.3760/cma.j.issn.1004-4477.2010.10.005
- VernacularTitle:血管环向应变在评价高血压患者颈动脉弹性中的价值
- Author:
Lei XU
;
Tiesheng CAO
;
Xi LIU
;
Li ZHANG
;
Jia WANG
;
Sheng CHEN
;
Jie LIU
;
Yunyou DUAN
- Publication Type:Journal Article
- Keywords:
Ultrasonography;
Carotid arteries;
Elasticity;
Circumferential strain
- From:
Chinese Journal of Ultrasonography
2010;19(10):842-845
- CountryChina
- Language:Chinese
-
Abstract:
Objective To investigate the clinical value of circumferential strain and strain rate in estimating the carotid elasticity. Methods Thirty-five consecutive patients of hypertension were enrolled in this study as the patient group and 36 healthy volunteers whose ages were matched with the patient group were included as controls. The intima-media thickness(IMT) of common carotid arteries of both the patients and controls were measured using RF-Data technique of ultrasound vascular measurement and the following traditional parameters reflecting common carotid elasticity were obtained: pulse wave velocity (PWV),arterial compliance (AC). While the new parameters reflecting vascular strain including endovascular longitudinal strain(EN-LS), endovascular circumferential strain(EN-CS), endovascular longitudinal strain rate(EN-LSR) ,endovascular circumferential strain rate(EN-CSR), adventitial longitudinal strain(EP-LS),adventitial circumferential strain ( EP-CS ), adventitial longitudinal strain rate ( EP-LSR ), adventitial circumferential strain rate(EP-CSR) were collected using the technique of X-strain. All the corresponding parameters were compared between hypertensive group and controls. The correlations between elasticity and hemodynamic parameters were analyzed. Results In the hypertension patients,PWV was higher while AC,EN-CS,EN-CSR,EP-CS and EP-CSR were lower than that of the control group( P ＜0.05). No significant differences were detected in the longitudinal strain and strain rate. In the hypertension group,AC correlated positively with PWV, while EN-CS, EN-CSR, EP-CS and EP-CSR correlated negatively with PWV and positively with AC. Conclusions Circumferential strain and strain rate conform well to the mechanical principle and the characteristic anatomic and histological structure of the vessels and may be used to reflect the early changes of the vascular elasticity.
