Left marginal artery

The left marginal artery (or obtuse marginal artery) is a branch of the circumflex artery, originating at the left atrioventricular sulcus, traveling along the left margin of heart towards the apex of the heart.

Left marginal artery
Base and diaphragmatic surface of heart. (Left marginal artery not visible, but would be near center left.)
RCA = right coronary
AB = atrial branches
SANB = sinuatrial nodal
RMA = right marginal
LCA = left coronary
CB = circumflex branch
LAD/AIB = anterior interventricular
LMA = left marginal
PIA/PDA = posterior descending
AVN = atrioventricular nodal

SCV = small cardiac
ACV = anterior cardiac
AIV/GCV = great cardiac
MCV = middle cardiac
CS = coronary sinus
Sourcecircumflex artery
Veinleft marginal vein
Suppliesleft ventricle
Latinramus marginalis sinister arteriae coronariae sinistrae
Anatomical terminology

See also

  • Right marginal branch of right coronary artery

Additional images

Coronary arteries (labeled in red text) and other major landmarks (in blue text). Left marginal artery is labeled at right.
  • Anatomy photo:20:09-0106 at the SUNY Downstate Medical Center - "Heart: The Left Coronary Artery and its Branches"
  • Anatomy figure: 20:04-02 at Human Anatomy Online, SUNY Downstate Medical Center - "Posterior view of the heart."
  • "Obtuse marginal artery". Medcyclopaedia. GE. Archived from the original on 2012-02-05.
  • Image at texheartsurgeons.com
  • Overview and diagrams at cardiologysite.com

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