Abstract
Since December 2001, a total of 52 obese schoolchildren and 38 non-obese controls have undergone vascular ultrasound at our institution. From this cohort, we enrolled 40 obese children (16 girls, median age 12 years, mean body mass index (BMI) 27.5±4.6 kg/m2) and 26 non-obese peers (12 girls, median age 12 years, mean BMI 16.1±2.4 kg/m2) for the present study. We analysed the association between obesity, subclinical atherosclerosis and haemorheological variables, including whole blood viscosity (WBV) at four different shear rates (200 s-1, 30 s-1, 5 s-1 and 1 s-1), plasma viscosity, and serum lipid concentrations. Blood lipids and apolipoproteins were also determined and correlated with carotid intima-media thickness (IMT) and flow-mediated dilatation (FMD) of the brachial artery, measured by high-resolution ultrasonography. WBV at 200 s-1, 30 s-1 and 5 s-1, as well as plasma viscosity, were significantly higher in the obesity group (all P <0.01). No difference was seen for WBV at 1 s-1, erythrocyte aggregation and haematocrit. WBV at high shear rates was significantly associated with BMI, increased IMT and decreased FMD ( P <0.05). After controlling for BMI on stepwise linear regression, WBV at 30 s-1 was the strongest predictor of IMT ( P <0.01) and FMD ( P <0.05) among our study variables. Conclusion: Hyperviscosity is related to subclinical atherosclerosis in obese schoolchildren. Viscosity parameters contribute new information in addition to body mass index, blood pressure and blood lipids and may help to facilitate risk stratification in obese paediatric patients.
Similar content being viewed by others
Abbreviations
- BMI :
-
body mass index
- CCA :
-
common carotid artery
- FMD :
-
flow-mediated dilatation
- ICA :
-
internal carotid artery
- IMT :
-
intima-media thickness
- TC :
-
total cholestrol
- TG :
-
total triglycerides
- WBV :
-
whole blood viscosity
References
Berenson GS (2002) Childhood risk factors predict adult risk associated with subclinical cardiovascular disease. The Bogalusa Heart Study. Am J Cardiol 90: 3L–7L
Blann A, Bignell A, McCollum C (1998) Von Willebrand factor, fibrinogen and other plasma proteins as determinants of plasma viscosity. Atherosclerosis 139: 317–322
Brun JF, Aloulou I, Varlet-Marie E (2004) Hemorheological aspects of the metabolic syndrome: markers of insulin resistance, obesity or hyperinsulinemia? Clin Hemorheol Microcirc 30: 203–209
Cacciari E, Balsamo A, Palareti G, Cassio A, Argento R, Poggi M, Tassoni P, Cicognani A, Tacconi M, Pascucci MG (1988) Haemorheologic and fibrinolytic evaluation in obese children and adolescents. Eur J Pediatr 147: 381–394
Cam H, Pusuroglu K, Aydin A, Ercan M (2003) Effects of hemorheological factors on the development of hypertension in diabetic children. J Trop Pediatr 49: 164–167
Celermajer DS, Soerensen KE, Gooch VM, Spiegelhalter DJ, Miller OI, Sullivan ID, Lloyd JK, Deanfield JE (1992) Non-invasive detection of endothelial dysfunction in children and adults at risk of atherosclerosis. Lancet 340: 1111–1115
Chen W, Srinivasan SR, Li S, Xu J, Berenson GS (2005) Metabolic syndrome variables at low levels in childhood are beneficially associated with adulthood cardiovascular risk: the Bogalusa Heart Study. Diabetes Care 28: 126–131
Ciuffetti G, Schillaci G, Lombardini R, Pirro M, Vaudo G, Mannarino E (2005) Prognostic impact of low-shear whole blood viscosity in hypertensive men. Eur J Clin Invest 35: 93–98
Dalmau Serra J, Vaya Montana A, Martinez Silvestre M, Blesa Baviera LC, Aznar Lucea J (1996) New markers of atherogenic risk: hemorrheological profile in children and adolescents with familial hypercholesterolemia. An Esp Pediatr 45: 393–397
De Groot E, Hovingh GK, Wiegman A, Duriez P, Smit AJ, Fruchart JC, Kastelein JJP (2004) Measurement of arterial wall thickness as a surrogate marker for atherosclerosis. Circulation 109: III-33–III-38
Fanari P, Somazzi R, Nasrawi F, Ticozzelli P, Grugni G, Agosti R, Longhini E (1993) Haemorheological changes in obese adolescents after short-term diet. Int J Obes Relat Metab Disord 17: 487–494
Fowkes FG, Pell JP, Donnan PT, Housley E, Lowe GD, Riemersma RA, Prescott RJ (1994) Sex differences in susceptibility to etiologic factors for peripheral atherosclerosis. Importance of plasma fibrinogen and blood viscosity. Arterioscler Thromb Vasc Biol 14: 862–868
Haszon I, Papp F, Kovacs J, Bors M, Nemeth I, Bereczki C, Turi S (2003) Platelet aggregation, blood viscosity and serum lipids in hypertensive and obese children. Eur J Pediatr 162: 385-390
Iannuzzi A, Licenziati MR, Acampora C, Salvatore V, Auriemma L, Romano ML, Panico S, Rubba P, Trevisan M (2004) Increased carotid intima-media thickness and stiffness in obese children. Diabetes Care 27: 2506–2508
Irace C, Ciamei M, Crivaro A, Fiaschi E, Madia A, Cortese C, Gnasso A (2003) Hematocrit is associated with carotid atherosclerosis in men but not in women. Coron Artery Dis 14: 279–284
Järvisalo MJ, Putto-Laurila A, Jartti L, Lehtimäki T, Solakivi T, Rönnemaa T, Raitakari OT (2002) Carotid artery intima-media thickness in children with type 1 diabetes. Diabetes 51: 493–498
Lee AJ, Mowbray PI, Lowe GD, Rumley A, Fowkes FG, Allan PL (1998) Blood viscosity and elevated carotid intima-media thickness in men and women: the Edinburgh Artery Study. Circulation 97: 1467–1473
Lee CYJ, Kim KC, Park HW, Song JH, Lee CH (2004) Rheological properties of erythrocytes from male hypercholesterolemia. Microvasc Res 67: 133–138
Levenson J, Gariepy J, Del-Pino M, Salomon J, Denarie N, Simon A (2000) Association of plasma viscosity and carotid thickening in a French working cohort. Am J Hypertens 13: 753–758
Lo Presti R, Sinagra D, Montana M, Scarpitta AM, Catania A, Caimi G (2002) Haemorheological profile in metabolic syndrome. Clin Hemorheol Microcirc 26: 241–247
Lowe GDO, Lee AJ, Rumley A, Price JF, Fowkes FGR (1997) Blood viscosity and risk of cardiovascular events: the Edinburgh Artery Study. Br J Haematol 96: 168–173
Nordby G, Moan A, Kjeldsen SE, Os I (1995) Relationship between hemorheological factors and insulin sensitivity in normotensive and hypertensive premenopausal women. Am J Hypertens 8: 439–444
Sola E, Vaya A, Contreras T, Falco C, Corella D, Hernandez A, Aznar J (2004) Rheological profile in severe and morbid obesity. Preliminary results. Clin Hemorheol Microcirc 30: 415–418
Sorof JM, Alexandrov AV, Cardwell G, Portman RJ (2003) Carotid artery intimal-medial thickness and left ventricular hypertrophy in children with elevated blood pressure. Pediatrics 111: 61–66
Sweetnam PM, Thomas HF, Yarnell JWG, Beswick AD, Baker IA, Elwood PC (1996) Fibrinogen, viscosity, and the 10-year incidence of ischaemic heart disease: the Caerphilly and Speedwell studies. Eur Heart J 17: 1814–1820
Tonstad S, Joakimsen O, Stenland-Bugge E, Leren TP, Ose L, Rusell D, Bonaa KH (1996) Risk factors related to carotid intima-media thickness and plaque in children with familial hypercholesterolemia and control subjects. Arterioscler Thromb Vasc Biol 16: 984–991
Woo KS, Chook P, Yu CW, Sung RY, Qiao M, Leung SS, Lam CW, Metreweli C, Celermajer DS (2004) Overweight in children is associated with arterial endothelial dysfunction and intima-media thickening. Int J Obes Relat Metab Disord 28: 852–857
Zhu H, Wang ZW (2000) Establishing a quality control standard for blood viscosity determination (in Chinese). Chin J Clin Lab Sci 18: 95–96
Zhu WH, Huang XM, He J, Li MX, Neubauer H (2005) Arterial intima-media thickening and endothelial dysfunction in obese Chinese children. Eur J Pediatr 164: 337–344
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Zhu, W., Li, M., Huang, X. et al. Association of hyperviscosity and subclinical atherosclerosis in obese schoolchildren. Eur J Pediatr 164, 639–645 (2005). https://doi.org/10.1007/s00431-005-1725-9
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s00431-005-1725-9