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Deviation from Murray's law is associated with a higher degree of calcification in coronary bifurcations

Schoenenberger, A. W. and Urbanek, N. and Toggweiler, S. and Seelos, R. and Jamshidi, P. and Resink, T. J. and Erne, P.. (2012) Deviation from Murray's law is associated with a higher degree of calcification in coronary bifurcations. Atherosclerosis, Vol. 221, H. 1. pp. 124-130.

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Official URL: http://edoc.unibas.ch/dok/A6164885

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Abstract

Murray's law describes the optimal branching anatomy of vascular bifurcations. If Murray's law is obeyed, shear stress is constant over the bifurcation. Associations between Murray's law and intravascular ultrasound (IVUS) assessed plaque composition near coronary bifurcations have not been investigated previously.; In 253 patients plaque components (fibrous, fibro-fatty, necrotic core, and dense calcium) were identified by IVUS in segments proximal and distal to the bifurcation of a coronary side branch. The ratio of mother to daughter vessels was calculated according to Murray's law (Murray ratio) with a high Murray ratio indicating low shear stress. Analysis of variance was used to detect independent associations of Murray ratio and plaque composition.; Patients with a high Murray ratio exhibited a higher relative amount of dense calcium and a lower amount of fibrous and fibro-fatty tissue than those with a low Murray ratio. After adjustment for age, sex, cardiovascular risk factors or concomitant medications, the Murray ratio remained significantly associated with fibrous volume distal (F-ratio 4.90, P=0.028) to the bifurcation, fibro-fatty volume distal (F-ratio 4.76, P=0.030) to the bifurcation, and dense calcium volume proximal (F-ratio 5.93, P=0.016) and distal (F-ratio 5.16, P=0.024) to the bifurcation.; This study shows that deviation from Murray's law is associated with a high degree of calcification near coronary bifurcations. Individual deviations from Murray's law may explain why some patients are prone to plaque formation near vessel bifurcations.
Faculties and Departments:03 Faculty of Medicine > Departement Biomedizin > Further Research Groups at DBM > Signal Transduction (Resink/Erne)
UniBasel Contributors:Resink, Thérèse J. and Erne, Paul
Item Type:Article, refereed
Article Subtype:Research Article
Bibsysno:Link to catalogue
Publisher:Elsevier
ISSN:0021-9150
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:10 Apr 2015 09:14
Deposited On:25 Oct 2013 08:33

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