The distribution of arteriosclerotic plaques at a bifurcation of a coronary artery can be classified by a number of methods. The designation used for the SYNTAX score is modified from the Duke and ICPS classification systems.
Proximal
Distal
Side Branch
SYNTAX
Medina
present
absent
absent
Type A
1,0,0
absent
present
absent
Type B
0,1,0
present
present
absent
Type C
1,1,0
present
present
present
Type D
1,1,1
absent
absent
present
Type E
0,0,1
present
absent
present
Type F
1,0,1
absent
present
present
Type G
0,1,1
where:
• The Medina designation uses (proximal, distal, side branch) with 1 if lesion present and 0 if absent.
• There are 8 combinations for present/absent at the 3 sites. Absent/Absent/Absent not coded.
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