What are the left circumflex artery anatomic findings for coronary computed tomography angiography (CCTA)?

Updated: Dec 21, 2017
  • Author: Eugene C Lin, MD; Chief Editor: Eugene C Lin, MD  more...
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The left circumflex artery gives off obtuse marginal branches that supply the posterolateral wall. In many cases, particularly in a right-dominant system, the first obtuse marginal branch will be larger than the circumflex. The circumflex artery is the vessel that remains in the atrioventricular groove.

The left circumflex artery usually terminates in the atrioventricular groove. In a left dominant system, the PDA and posterolateral branches arise from the circumflex. In the codominant system, the posterolateral branches arise from the circumflex.

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