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Evaluation of endothelial dysfunction in hypertensive children and adolescents

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Abstract

Background

Atherosclerotic changes can be attributed to early endothelial damage in individuals with hypertension. We aimed to explore the relationship between endothelial dysfunction and hypertension in newly diagnosed children without end-organ damage, considering carotid intima-media thickness (CIMT), flow-mediated dilatation (FMD), and functional capillaroscopy parameters. We also analyzed the differences between dipper and non-dipper patients.

Methods

In this cross-sectional study, 20 patients diagnosed with essential hypertension with no target organ damage, and 20 age and sex-matched healthy volunteers were enrolled. The patient group comprised newly diagnosed individuals not receiving antihypertensive treatment. Hypertensive patients were divided into two groups (dipper and non-dipper patients). The measurements of CIMT, brachial FMD, and functional capillaroscopy were performed before starting treatment.

Results

Among the patients, 11 were boys, and 9 were girls, with a median age of 16.0 (2.13) years. Of 20 hypertensive patients, 10 were dipper and 10 were non-dipper. Significant differences were observed between the hypertensive patients and controls in terms of CIMT (p = 0.04), brachial artery FMD (p = 0.02), and functional capillary density (p < 0.001). Hypertensive patients exhibited increased CIMT, reduced brachial artery FMD, and lower capillary density. However, there were no differences between dippers and non-dippers regarding age, sex, height SDS, weight SDS, CIMT SDS, brachial artery FMD, and capillary density.

Conclusions

Understanding the vascular consequences associated with essential hypertension emphasizes the importance of early detection and management of hypertension. Herein, we have effectively highlighted significant endothelial changes through the analysis of three parameters in newly diagnosed children without apparent target organ damage.

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Data Availability

The data are available from the corresponding author upon request.

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Correspondence to Kenan Doğan.

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Ethical approval

The protocol of the study was approved by the Ethical Commission for Research from Kocaeli University School of Medicine (KÜ-GOKAEK-2023/03.07). Informed consent was obtained from all participants before the study.

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Doğan, K., Başar, E.Z., Aytaç, M.B. et al. Evaluation of endothelial dysfunction in hypertensive children and adolescents. Pediatr Nephrol 39, 1193–1199 (2024). https://doi.org/10.1007/s00467-023-06205-4

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