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ABCD2 algorithm for risk of stroke following TIA

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ABCD2 algorithm(1) predicts a patient's very early risk of stroke following a TIA.

The score is calculated according to 5 important clinical features:

Symbol Clinical feature Criterion Point
A Age >= 60 1
B Blood pressure >= 140/90 mmHg 1
C Clinical features of the TIA unilateral weakness 2
    speech disturbance without weakness 1
D1 Duration of symptoms >= 60 min 2
    10-59 min 1
    <10 min 0
D2 Diabetes diagnosed with diabetes? 1

The corresponding 2 day risks for a subsequent stroke are:

ABCD2 score
Risk of stoke at 2 days
0-3
1%
4-5
4%
6-7
8%

 

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