CT
Four chamber C+ arterial phase
What vessel(s) do the red arrows point to? What coronary artery variant is shown in the images?
The red arrows point to the left circumflex artery eventually becoming the posterior descending artery. The variant is left-dominant coronary artery circulation.
What defines coronary artery dominance?
"Dominance" is defined in terms of which coronary artery supplies the posterior descending artery (PDA), which travels along the inferior interventricular groove from the crux of the heart to the apex, as well as the posterior left ventricular braches.
Series of images from a coronary CTA, demonstrating left-dominant circulation.
The images show the left circumflex artery eventually supplying the posterior descending artery (PDA), which travels in the posterior interventricular groove from the crux of the heart to the apex (red arrows). The orange arrows point to obtuse marginal branches of the left circumflex, supplying the posterior aspect of the left ventricle.