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.
- CT (C+ arterial phase):