TABLE 1:
Cut-off points for the quantification of internal carotid artery stenosis by use of CDS according to Nicolaides et al (15) for minimum false-positive and false-negative tests
| Stenosis (%)* | Duplex Velocity Criteria (m/s) |
||||
|---|---|---|---|---|---|
| PSVICA | EDVICA | PSVICA/PSVCCA | PSVICA/EDVCCA | EDVICA/EDVCCA | |
| <47% | <150 | <80 | <2 | <10 | <2.6 |
| 60% | 150–250 | 80–130 | 2–3.2 | 7–10 | <2.6 |
| 70% | 150–250 | >130 | 3.2–4 | 10–15 | 2.6–5.5 |
| 82% | >250 | >130 | >4 | 15–25 | 2.6–5.5 |
| 90% | >250 | >130 | >4 | >25 | >5.5 |
*
Diameters determined by angiography according to NASCET criteria.
Note.—CDS indicates color Doppler sonography; PSV, peak systolic velocity; EDV, end diastolic velocity.