The SYNTAX score includes extra points for specific findings that reflect the complexity of coronary artery disease.
Parameters:
(1) stenosis at the aortic ostia (segment 1, segment 5 vs segments 6 and 11 if dual left ostia)
(2) tortuosity
(3) length of the lesion in mm
(4) degree of calcification
(5) thrombus
(6) diffuse disease (small vessels)
(7) if total occlusion (TO) present:
(7a) duration in months
(7b) stump
(7c) bridging
(7d) number of segments before artery visible after the total occlusion
(7e) side branch diameter
|
Parameter |
Findings |
Points |
|
stenosis at aortic ostia |
none |
0 |
|
|
present |
1 |
|
tortuosity |
not severe |
0 |
|
|
severe |
2 |
|
length |
<= 20 mm |
0 |
|
|
> 20 mm |
1 |
|
degree of calcification |
not heavy |
0 |
|
|
heavy |
2 |
|
thrombus |
absent |
0 |
|
|
present |
1 |
|
diffuse disease |
none |
0 |
|
|
present |
<number of segments> |
|
duration if TO |
unknown |
1 |
|
|
> 3 months |
1 |
|
|
<= 3 months |
0 |
|
stump if TO |
blunt |
1 |
|
|
not blunt |
0 |
|
bridging if TO |
absent |
0 |
|
|
present |
1 |
|
segment visiable after TO |
|
<number of segments> |
|
side branch if TO |
all < 1.5 mm |
1 |
|
|
any < 1.5 mm |
1 |
|
|
all >= 1.5 mm |
0 |
where:
• Side branches >= 1.5 mm indicate a bifurcation or trifurcation
extra points for SYNTAX score =
= SUM(points for all of the parameters)
Specialty: Cardiology
ICD-10: ,
