Morphologic rather than functional or mechanical sonographic parameters of the brachial artery are related to

Matthias Frick1, Severin P Schwarzacher, Hannes F Alber

  • 1Division of Cardiology, Department of Medicine, University of Innsbruck, Anichstrasse 35, A-6020 Innsbruck, Austria.

Insights

Brachial artery wall cross-sectional area and intima-media thickness are linked to coronary artery disease. These morphologic measures, unlike functional or mechanical ones, accurately estimate coronary atherosclerotic risk.

Area of Science:

  • Cardiovascular imaging
  • Vascular biology
  • Diagnostic cardiology

Background:

  • Flow-mediated vasodilation (FMD) of the brachial artery (BA), carotid intima-media thickness (IMT), and aortic distensibility are known indicators of coronary artery disease (CAD).
  • Noninvasive assessment of BA parameters may offer insights into CAD presence.

Purpose of the Study:

  • To investigate the association between coronary atherosclerosis and noninvasively assessed functional, morphologic, and mechanical parameters of the brachial artery.
  • To identify which brachial artery sonographic parameters are most accurate in estimating coronary atherosclerotic risk.

Main Methods:

  • High-resolution ultrasound of the brachial artery was performed in 117 male patients undergoing coronary angiography.
  • Coronary artery disease was defined as >=30% diameter stenosis in >=1 major branch.
  • Brachial artery wall cross-sectional area (WCSA) was calculated from resting diameter and IMT.

Main Results:

  • Patients with CAD exhibited significantly greater BA-WCSA and IMT compared to non-CAD patients.
  • Flow-mediated vasodilation and distensibility did not differ significantly between groups.
  • Logistic regression analysis revealed that only WCSA and IMT independently correlated with the presence of CAD, after adjusting for various risk factors.

Conclusions:

  • Morphologic parameters of the brachial artery, specifically IMT and WCSA, are associated with the presence of coronary artery disease.
  • These morphologic measures appear to be more accurate than functional or mechanical BA parameters for estimating coronary atherosclerotic risk.
Abstract

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