Pulse wave velocity and augmentation index, but not intima-media thickness, are early indicators of vascular damage in hypercholesterolemic children
Version of Record online: 26 FEB 2010
© 2010 The Authors. Journal Compilation © 2010 Stichting European Society for Clinical Investigation Journal Foundation
European Journal of Clinical Investigation
Volume 40, Issue 3, pages 250–257, March 2010
How to Cite
Riggio, S., Mandraffino, G., Sardo, M. A., Iudicello, R., Camarda, N., Imbalzano, E., Alibrandi, A., Saitta, C., Carerj, S., Arrigo, T. and Saitta, A. (2010), Pulse wave velocity and augmentation index, but not intima-media thickness, are early indicators of vascular damage in hypercholesterolemic children. European Journal of Clinical Investigation, 40: 250–257. doi: 10.1111/j.1365-2362.2010.02260.x
- Issue online: 26 FEB 2010
- Version of Record online: 26 FEB 2010
- Received 28 May 2009; accepted 11 January 2010
- Arterial stiffness;
- augmentation index;
- intima-media thickness;
- pulse wave velocity
Eur J Clin Invest 2010; 40 (3): 250–257
Background Arterial stiffness is an important determinant of cardiovascular risk. It is associated with several cardiovascular risk factors, including hypertension, diabetes and cigarette smoking. However, there are conflicting data about the relationship between arterial stiffness and hypercholesterolemia. Furthermore, augmentation index (AIx), a measure of systemic arterial stiffness, has not been previously investigated in hypercholesterolemic (HCh) children. Aim of our study was to evaluate local and systemic arterial stiffness as well as carotid intima-media thickness (IMT) in HCh children and also to investigate the relation between serum cholesterol levels and arterial stiffness.
Materials and methods We determined lipid profile, body mass index, blood pressure, heart rate, carotid IMT and several arterial stiffness parameters, as β-index, elastic modulus (Ep), arterial compliance (AC), pulse wave velocity (PWV) and AIx, in 44 untreated HCh children (mean age 10·7 ± 2·8 years; 18 with familial hypercholesterolemia, FH, and 26 with primary hypercholesterolemia, PHC) and 18 age- and sex-matched controls. HCh children never received any medication, including antihypertensive and lipid lowering drugs.
Results Respect to controls and to PHC, FH had significantly higher (P < 0·001) β-index (5·22 ± 1·13 vs. 3·13 ± 0·74 and 3·60 ± 1·02), PWV (4·72 ± 0·72 m s−1 vs. 3·66 ± 0·55 m s−1 and 4·10 ± 0·67 m s−1), AIx (3·55 ± 3·97% vs. −4·43 ± 4·09% and 0·61 ± 2·39%) and Ep (64·4 ± 19·6 kPa vs. 36·2 ± 11·3 kPa and 42·9 ± 13·1), whereas AC (1·25 ± 0·48 mm2 kPa−1 vs. 1·9 ± 0·43 mm2 kPa−1 and 1·62 ± 0·43 mm2 kPa−1) was lower (P < 0·001). There was no significant difference in carotid IMT and blood pressure values between the groups. The multiple regression analysis showed a significant association of arterial stiffness values with plasma cholesterol levels (P < 0·0001).
Conclusion Our findings show that local and systemic arterial stiffness are increased in asymptomatic, normotensive HCh children, suggesting that HCh plays a key role in arterial mechanical impairment since the paediatric age.