Site of abnormal velocities and stenosis
| Abnormal TCDI site . | n . | Site of stenosis . | |||
|---|---|---|---|---|---|
| Intra . | Extra . | Intra + Extra . | Total . | ||
| Intracranial | |||||
| Isolated MCA | 66 | 12 | 3 | 0 | 15 |
| Isolated ICA | 8 | 2 | 0 | 0 | 2 |
| Isolated ACA | 3 | 0 | 0 | 0 | 0 |
| MCA + ACA | 3 | 1 | 0 | 0 | 1 |
| Extracranial | |||||
| Isolated eICA | 10 | 1 | 4 | 1 | 6 |
| Intra + Extra | |||||
| ACA + eICA | 1 | 0 | 0 | 1 | 1 |
| MCA + eICA | 1 | 0 | 1 | 0 | 1 |
| Total | 92 | 16 | 8 | 2 | 26 |
| Abnormal TCDI site . | n . | Site of stenosis . | |||
|---|---|---|---|---|---|
| Intra . | Extra . | Intra + Extra . | Total . | ||
| Intracranial | |||||
| Isolated MCA | 66 | 12 | 3 | 0 | 15 |
| Isolated ICA | 8 | 2 | 0 | 0 | 2 |
| Isolated ACA | 3 | 0 | 0 | 0 | 0 |
| MCA + ACA | 3 | 1 | 0 | 0 | 1 |
| Extracranial | |||||
| Isolated eICA | 10 | 1 | 4 | 1 | 6 |
| Intra + Extra | |||||
| ACA + eICA | 1 | 0 | 0 | 1 | 1 |
| MCA + eICA | 1 | 0 | 1 | 0 | 1 |
| Total | 92 | 16 | 8 | 2 | 26 |
Among the 18 patients with intracranial stenosis, 17 had abnormal TCDI in MCA or ICA (STOP criteria), whereas 1 patient had abnormal ACA velocities associated with abnormal eICA velocities and stenosis in ACA and eICA. Of note, 3 patients with isolated MCA abnormal velocities had also eICA stenosis, and 2 patients with isolated eICA abnormal velocities had intracranial stenosis (associated with extracranial in 1). Grading of stenosis detected 2 patients with grade 5, 2 with grade 4, 2 with grade 3, 3 with grade 2, and 17 with grade 1.
Extra, extracranial; intra, intracranial.