Canadian TIA Score

By Dr. Costa / July 4, 2026

Canadian Transient Ischemic Attack (TIA) Score

Estimates 7-day risk stratification after a suspected transient ischemic attack.

Clinical note: This calculator supports clinical risk stratification and does not replace urgent stroke assessment, local pathways, specialist advice, or clinical judgment.

Clinical Findings

First TIA in lifetime +2

Yes No

Symptoms lasting 10 minutes or longer +2

Yes No

History of carotid stenosis +2

Yes No

Already on antiplatelet therapy +3

Yes No

History of gait disturbance +1

Yes No

History of unilateral weakness +1

Yes No

History of vertigo −3

Yes No

Initial triage diastolic blood pressure ≥110 mmHg +3

Yes No

Dysarthria or aphasia on history or examination +1

Yes No

Investigations in the Emergency Department

Use results available during the emergency department evaluation.

Atrial fibrillation on ECG +2

Yes No

Infarction, new or old, on CT +1

Yes No

Platelet count ≥400 × 10⁹/L +2

Yes No

Glucose ≥15 mmol/L (270 mg/dL) +3

Yes No

Canadian TIA Score

0 points

Low risk

Score −3 to 3: low estimated 7-day risk (<1%).

Risk categories: low −3 to 3, medium 4 to 8, high ≥9. The validated outcome includes stroke or carotid revascularization within 7 days.

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