Table 1 Grading of severity of arterial stenosis [6]
Grade | Criteria |
|---|---|
0 | Normal patency |
1 | Mild (stenosis of less than 25% of diameter) |
2 | Moderate (stenosis of 25–50% of diameter) |
3 | Moderate severe (stenosis of 50–75% of diameter) |
4 | Severe (stenosis of 75–99% of diameter) |
5 | Complete occlusion |