Canadian Transient Ischemic Attack Score
From IDWiki
Background
- Risk score used to risk stratify patients who present with transient ischemic attack and minor stroke
- Predicts risk of stroke within 7 days
Criteria
| Item | Score |
|---|---|
| Clinical | |
| First TIA in lifetime | +2 |
| Symptoms lasting 10 minutes or longer | +2 |
| History of carotid artery stenosis | +2 |
| Already on antiplatelet therapy | +3 |
| History of gait disturbance | +1 |
| History of unilateral weakness | +1 |
| History of vertigo | -3 |
| Initial triage DBP ≥110 mmHg | +3 |
| Dysarthria or aphasia on history of examination | +1 |
| ED Investigations | |
| Atrial fibrillation on ECG | +2 |
| Infarction (new or old) on CT | +1 |
| Platelet count ≥400 | +2 |
| Glucose ≥15 mmol/L | +3 |
Interpretation
| Canadian TIA Score | % Risk of Stroke | Risk Category |
|---|---|---|
| -3 | 0.01% | low risk |
| -2 | 0.01-0.03% | |
| -1 | 0.03% | |
| 0 | 0.04% | |
| 1 | 0.07% | |
| 2 | 0.11% | |
| 3 | 0.2% | |
| 4 | 0.3% | medium risk |
| 5 | 0.5% | |
| 6 | 0.8% | |
| 7 | 1.2% | |
| 8 | 2% | |
| 9 | 3.2% | high risk |
| 10 | 5.1% | |
| 11 | 8.1% | |
| 12 | 12.6% | |
| 13 | 19% | |
| 14 | 27.6% | |
| ≥15 | >27.6% |
