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% |