Table 2.
Differences and similarities with respect to criteria and definitions between the SYNTAX score and CatLet score.
| Items | Values | |
|---|---|---|
| Calculators | CatLet score | SYNTAX score |
| 1. Underlying mechanism | Weighted matrix# | Leaman score |
| 2. Dominance selection | ||
| RCA dominance | 6 types | 2 types |
| Dx size | 3 types | NA |
| LAD length | 3 types | NA |
| 3. Lesion definition | As in the SYNTAX | ≥50% diameter stenosis on vessels >1.5 mm |
| 4. Multiplication factor | As in the SYNTAX | 5.0 for occlusion 2.0 for nonocclusion |
| 5. Lesion types | 6 types | 2 types |
| Native nonocclusion (50–99% diameter reduction) | Yes | Yes |
| Native acute total occlusion (ATO) | Yes | Yes |
| Native chronic total occlusion (CTO) | Yes | Yes |
| In-stent nonocclusion | Yes | NA |
| In-stent ATO | Yes | NA |
| In-stent CTO | Yes | NA |
| 6. Scoring modification | Yes if appropriate | No |
| 7. Culprit vessels | Indicated | No |
| 8. Trifurcation | Yes/no | Scored |
| 9. Bifurcation | Yes/no | Scored |
| 10. Aorta ostial lesion | Yes/no | Scored |
| 11. Severe tortuosity | Yes/no | Scored |
| 12. Length >20 mm | Yes/no | Scored |
| 13. Heavy calcification | Yes/no | Scored |
| 16. Thrombus | Yes/no | Scored |
| 17. Diffuse disease/small vessels | Discarded | Scored |
Notes: CatLet = Coronary Artery Tree description and Lesion EvaluaTion; SYNTAX = Synergy between Percutaneous Coronary Intervention with Taxus and Cardiac Surgery; RCA = right coronary artery; LAD = left anterior descending artery; Dx = diagonals; NA = not available. #See reference [16].