SYNTAX score

Scores every ≥ 50% lesion in vessels ≥ 1.5 mm using Leaman segment weights by dominance, plus total occlusion, bifurcation, trifurcation, calcification, tortuosity and diffuse-disease modifiers. Tertiles (0–22, 23–32, ≥ 33) drive guideline recommendations for left main and 3-vessel disease.

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Coronary dominance

Changes the weighting of the LM, circumflex and RCA segments

Score every lesion with ≥ 50% diameter stenosis in a vessel ≥ 1.5 mm. Tandem lesions less than three reference-vessel diameters apart count as one lesion.

Lesion 1

Tap once for 50–99% stenosis, twice for total occlusion, three times to clear

LAD

LCx

RCA

Diffuse disease / small vessels

0 segments · +1 each. ≥ 75% of the segment length with a vessel diameter < 2 mm

LAD

LCx

RCA

SYNTAX score · right dominant

Select the segments involved in the first lesion.

Medical no:Date:

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References