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Published on: February 7, 2015
Early Carotid Structural and Functional Changes Associated With Elevated Blood Pressure in Children: A Multimodal
Hui Wang1, Yuanyuan Sheng1, Xueyuan Lin1
1Department of Ultrasound, Shenzhen Medical Ultrasound Engineering Center, Shenzhen People's Hospital, Shenzhen, Guangdong, China.
Insights
Childhood hypertension is linked to early carotid artery changes, including increased thickness and stiffness. Advanced ultrasound techniques can detect these subtle vascular alterations in children with elevated blood pressure (BP).
Area of Science:
- Pediatric Cardiology
- Vascular Ultrasound
- Hypertension Research
Background:
- Childhood hypertension predicts adult cardiovascular disease.
- The carotid artery is a key target organ for elevated blood pressure (BP).
- Early detection of vascular changes in children is crucial.
Purpose of the Study:
- To assess the association between carotid ultrasound indices and elevated BP in children.
- To identify early vascular changes using multimodal ultrasound imaging.
- To evaluate the utility of ultrahigh frequency ultrasound in detecting subtle vascular changes.
Main Methods:
- A case-control observational study of 118 children (aged 10-11 years).
- Carotid ultrasound measurements included CIMT, uhf-CIMT, CMT, I/M ratio, and rf-PWV.
- Multivariate linear regression models adjusted for age, sex, and BMI were used.
Main Results:
- Children with elevated BP showed higher uhf-CIMT, CMT, rf-PWV, and lower I/M ratio compared to normal BP group (p < 0.05).
- Systolic BP was most strongly associated with CMT (r = 0.45).
- Elevated BP remained independently associated with CMT, uhf-CIMT, I/M, and rf-PWV after adjustments (p < 0.05).
Conclusions:
- Elevated BP in children is associated with early carotid structural remodeling and increased arterial stiffness.
- Ultrahigh frequency ultrasound shows promise in detecting subtle vascular changes in pediatric hypertension.
- Early vascular assessment in children with elevated BP is essential for cardiovascular risk stratification.
Abstract:
Childhood hypertension is closely associated with cardiovascular disease in adulthood, and the carotid artery is one of the principal target organs affected by elevated blood pressure (BP). The purpose of this study is to assess the association between carotid ultrasound-derived indices and elevated BP in children and to identify early vascular changes using multimodal ultrasound imaging. This case-control observational study included 118 children aged 10-11 years, of whom 55 had elevated BP and 63 had normal BP. Carotid ultrasound measurements included carotid diameter, conventional carotid intima-media thickness (CIMT), ultrahigh frequency CIMT (uhf-CIMT), carotid intima thickness, carotid media thickness (CMT), intima-to-media ratio (I/M), and radiofrequency-derived pulse wave velocity (rf-PWV). Associations between ultrasound parameters and BP were evaluated using multivariate linear regression models adjusted for age, sex, and body mass index. Children with elevated BP had higher values of uhf-CIMT, CMT, rf-PWV and lower values of I/M compared with children with normal BP (all p < 0.05). Systolic BP with the strongest association observed for CMT (r = 0.45). After adjustment for potential confounders, elevated BP remained independently associated with CMT, uhf-CIMT, I/M, and rf-PWV (all p < 0.05). Rf-PWV was significantly associated with carotid structural indices, particularly the I/M ratio (p < 0.05). Elevated BP in children is associated with early carotid structural remodeling and increased arterial stiffness. Ultrahigh frequency ultrasound may facilitate the detection of subtle vascular changes in pediatric with elevated BP.
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