What Vascular Ultrasound Testing Has Revealed about Pediatric Atherogenesis, and a Potential Clinical Role for Ultrasound in Pediatric Risk Assessment
Arnold H. Slyper
Department of Pediatrics, Medical College of Wisconsin, Milwaukee, Wisconsin 53226
Address all correspondence and requests for reprints to: Arnold H. Slyper, M.D., Loyola University Medical Center, 2160 South First Avenue, Maywood, Illinois 60153. E-mail: aslyper{at}lumc.edu.
Coronary vascular disease is one facet of a generalized disturbanceof vascular function present throughout the vascular tree. Dysfunctionof the endothelium leads to thickening of the intima and mediaof the vessel wall of large and medium-sized muscular arteriesand large elastic arteries, such as the aorta, carotid, andiliac arteries. Flow-mediated dilatation of the brachial arteryis one of several tests used to assess dysfunction of the endotheliumusing high resolution ultrasound. Endothelial dysfunction hasbeen demonstrated in children with heterozygous familial hypercholesterolemia,type 1 diabetes, morbid obesity, and homozygous homocystinuriaand in the offspring of a parent with early coronary disease.High resolution ultrasound has also confirmed postmortem findingsthat atherogenesis has its beginnings in childhood and adolescence,with the demonstration of increased carotid artery intima-medialthickening in children with familial hypercholesterolemia, familialcombined hyperlipidemia, and type 1 diabetes and in the offspringof a parent with early coronary disease. In combination withfamily history and traditional risk factors, ultrasound evaluationof brachial artery flow-mediated vasodilation and carotid arteryintima-medial thickening could be used in a clinical settingto assess coronary risk in high risk pediatric patients.
Abbreviation: LDL, Low-density lipoprotein.
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