Definition and grading of neurological deficits
| Definition | Description |
|---|---|
| Complication | Neurological deterioration, NIHSS ≥1 |
| Transient ischemic attack | Resolution of new focal deficit within 24 hours |
| No CT or MRI evidence of infarction | |
| Cerebrovascular accident, symptomatic | Greater than 30 days duration |
| Major | NIHSS ≥4, mRS ≥3 |
| Minor | NIHSS <4, mRS ≤2 |
NIHSS indicates National Institutes of Health Stroke Scale; mRS, Modified Rankin Scale.