European Heart Journal Advance Access originally published online on March 10, 2005
European Heart Journal 2005 26(10):960-966; doi:10.1093/eurheartj/ehi177
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Non-invasive ultrasound in arterial wall dynamics in humans: what have we learned and what remains to be solved
1Department of Physiology, Cardiovascular Research Institute Maastricht, University of Maastricht, PO Box 616, 6200 MD Maastricht, The Netherlands
2Department of Biophysics, Cardiovascular Research Institute Maastricht, University of Maastricht, PO Box 616, 6200 MD Maastricht, The Netherlands
Received 22 November 2004; revised 20 January 2005; accepted 27 January 2005; online publish-ahead-of-print 10 March 2005.
* Corresponding author. Tel: +31 43 388 1198; fax: +31 43 388 4166. E-mail address: reneman{at}fys.unimaas.nl
In the past decades, non-invasive vascular ultrasound has substantially improved our insights into artery wall dynamics under normal circumstances and in disease. Although we have learned a lot, the methods in use are subject to improvement. In this review, we discuss the most important achievements in non-invasive assessment of dynamic artery wall properties in humans with emphasis on the clinical relevance of the observations. Special attention will be paid to the changes observed in aging, and in essential and borderline hypertension, because the loss of compliance (i.e. the ability to store volume thereby reducing pressure increases during ejection) of the elastic arteries in the elderly and in these patients possibly has consequences on their management. The changes in dynamic artery wall properties in diabetes and atherosclerosis are briefly discussed as well. A new approach to the determination of baroreceptor sensitivity, using artery stretch as input, is presented. The review starts with a description of the parameters most commonly used to describe dynamic artery wall properties and of the techniques employed to assess these parameters. The problems encountered in these assessments and the possible solutions to these problems are addressed as well.
Key Words: Vascular ultrasound • Compliance • Distensibility • Strain • Ageing • Hypertension • Diabetes • Baroreceptor reflex
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