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Canadian Transient Ischemic Attack (TIA) Score
Predicts 7-day stroke risk after emergency department TIA/minor stroke.
Canadian Transient Ischemic Attack (TIA) Score
First TIA in lifetime
Symptoms lasted >=10 minutes
History of carotid stenosis
Already taking antiplatelet therapy
History of gait disturbance
History of unilateral weakness
Initial triage diastolic BP >=110 mmHg
Dysarthria or aphasia
Atrial fibrillation on ECG
Infarction (new or old) on CT
Platelet count >=400 x 10^9/L
Glucose >=15 mmol/L
History of vertigo
Result0 points
Approximate 7-day risk of stroke (with or without carotid endarterectomy/stenting) is low (~0.5%).
- 7-day stroke risk
- low (~0.5%)
When to use
- Stratifying 7-day stroke risk in emergency department patients presenting with TIA or minor stroke to guide admission, urgency of imaging, and specialist referral.
Formula
Sum of points: first-ever TIA (+2), symptoms >=10 min (+2), known carotid stenosis (+2), already on antiplatelet therapy (+3), gait disturbance (+1), unilateral weakness (+1), triage diastolic BP >=110 (+3), dysarthria/aphasia (+1), atrial fibrillation on ECG (+2), infarction on CT (+1), platelets >=400x10^9/L (+2), glucose >=15 mmol/L (+3), history of vertigo (-3). Low risk <=3, medium 4-8, high >=9.