doi: 10.1161/CIRCULATIONAHA.104.532663
(Circulation. 2005;112:1789-1797.)
© 2005 American Heart Association, Inc.
Pediatric Cardiology |
Arterial Distensibility in Adolescents
The Influence of Adiposity, the Metabolic Syndrome, and Classic Risk Factors
From the Division of Community Health Sciences, St George’s, University of London (P.H.W., J.A.G., C.O., D.G.C.) and the Vascular Physiology Unit, Great Ormond Street Hospital (A.E.D., M.K., J.E.D.), London, United Kingdom.
Correspondence to Professor P.H. Whincup, Division of Community Health Sciences, St George’s, University of London, London SW17 0RE, United Kingdom. E-mail p.whincup{at}sgul.ac.uk
Received January 5, 2005; revision received June 30, 2005; accepted July 6, 2005.
Background— Atherosclerosis develops from childhood, but the determinants of this preclinical stage remain uncertain. We examined the relations of classic coronary risk factors, adiposity and its associated metabolic disturbances, to arterial distensibility (a marker of early arterial disease) in 13- to 15-year-olds, some of whom had previously been studied at ages 9 to 11 years.
Methods and Results— Brachial artery distensibility was measured by a noninvasive ultrasound technique in 471 British children in whom measures of adiposity, blood pressure, fasting blood lipids, and insulin had been made. All adiposity measures showed strong graded inverse relationships with distensibility. Inverse associations with distensibility were also observed for insulin resistance (homeostasis model assessment), diastolic pressure, C-reactive protein, and the number of metabolic syndrome components present, which had a graded relation to distensibility. Total and LDL cholesterol levels were also inversely related to distensibility, but less strongly than adiposity; homocysteine had no relation to distensibility. Although the relations of total and LDL cholesterol and diastolic pressure to distensibility had been present at 9 to 11 years of age, those of adiposity and insulin resistance were only apparent at 13 to 15 years.
Conclusions— Adiposity and its metabolic consequences are associated with adverse changes in the arterial wall by the teenage years. The graded relation with increasing adiposity was stronger than that for cholesterol and was seen at body mass index levels well below those considered to represent "obesity." This emphasizes the importance of population-based strategies to control adiposity and its metabolic consequences in the young.
Key Words: epidemiology • lipids • obesity • physiology • atherosclerosis
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