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Color duplex ultrasonography criteria for identification of 70% to 99% internal carotid artery stensosis
| Parameters | Criteria |
|---|---|
| PSV | ≥230 cm/s |
| EDV | ≥75 cm/s |
| PSVICA/CCA | ≥3.6 |
Note.—PSV indicates peak systolic velocity; EDV, end diastolic velocity; PSVICA/CCA, ratio of internal carotid artery to common carotid artery peak systolic velocity.
