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Left coronary artery (anatomy)

Authoring team

The left coronary artery arises from the left aortic sinus. It passes a short distance to the left, posterior to the pulmonary trunk and anterior to the left auricle, to meet with the atrioventricular groove. At this point, it divides into two main branches:

  • the circumflex artery
  • the anterior interventricular artery

The left coronary artery branches to supply the:

  • left atrium
  • left ventricle
  • interventricular septum - anterior section
  • nodes:
    • sinuatrial in 45% of the population
    • atrioventricular node in 20% of the population

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The content herein is provided for informational purposes and does not replace the need to apply professional clinical judgement when diagnosing or treating any medical condition. A licensed medical practitioner should be consulted for diagnosis and treatment of any and all medical conditions.

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