The segmental anatomy of the coronary arteries has been originally developed and published by the Council on Cardiovascular Surgery and the American Heart Association (AHA). It is widely used for the description of coronary findings in particular within the scope of coronary artery disease.
Coronary artery segments
The three coronary arteries are subdivided into different coronary segments. The original model features 15 segments 1.
-
right coronary artery (RCA)
- proximal segment (1)
- medial segment (2)
- distal segment (3)
- posterior descending artery (PDA) (4)
- left main coronary artery (5)
-
left anterior descending artery (LAD)
- proximal segment (6)
- medial segment (7)
- apical segment (8)
- first diagonal branch (D1) (9)
- second diagonal branch (D2) (10)
-
circumflex artery (Cx)
- proximal segment (11)
- obtuse marginal branch (OM) (12)
- distal segment (13)
- left posterolateral branch (PL) (14)
- posterior descending artery (PDA) (15)
Additional segments used are the following branches 2-4
- posterolateral branch (RPL) of the right coronary artery (16)
- ramus intermedius artery (17)
- posterolateral branch (LPL) of the circumflex artery (18)
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