Characteristics of Patients
| Characteristic | Asymptomatic | TIA | Stroke |
|---|---|---|---|
| No. of patients | 21 | 12 | 29 |
| ICA occlusion/stenosis | 8/13 | 5/7 | 16/13 |
| Asymptomatic contralateral carotid stenosis >50% (n) | 2 | 2 | 6 |
| Asymptomatic vertebral artery stenosis >50% (n) | 4 | 2 | 1 |
| Type of lesion (n) | |||
| External borderzone infarcts | 0 | 0 | 12 |
| Territorial infarcts | 1 | 0 | 10 |
| Internal borderzone infarcts | 0 | 1 | 12 |
| Other white matter infarcts | 4 | 4 | 7 |
| Striatocapsular infarcts | 0 | 0 | 5 |
| Lacunar infarcts | 8 | 2 | 12 |
TIA = transient ischemic attack.