Synopsis
Recognise a suspected transient ischaemic attack, start safe immediate treatment, and arrange rapid specialist assessment without false reassurance from symptom resolution or a risk score.
- A TIA is a transient focal neurological syndrome caused by cerebral, spinal or retinal ischaemia without acute infarction; the diagnosis remains clinical and retrospective rather than being proved by one normal scan.
- Sudden negative symptoms such as unilateral weakness, language disturbance or monocular visual loss fit better than gradually spreading positive tingling, flashing lights or jerking, although atypical presentations still need expert assessment.
- Treat suspected TIA as an urgent warning of stroke: give aspirin 300 mg immediately unless contraindicated and arrange specialist assessment within 24 hours under current NICE guidance.
- Do not use ABCD2 or another prediction score to decide referral urgency; apparently low scores can coexist with atrial fibrillation, carotid stenosis or repeated events.
- Persistent deficit, current recurrent symptoms, reduced consciousness or an uncertain last-known-well time belongs on the emergency acute-stroke pathway rather than the outpatient TIA route.
- Routine CT brain is not recommended for every suspected TIA; use it when an alternative diagnosis is suspected, while specialist-directed MRI with diffusion-weighted imaging may demonstrate infarction or a competing lesion.
- Carotid-territory symptoms require urgent carotid imaging if the person could be suitable for endarterectomy; benefit depends on symptom–artery concordance, stenosis measurement and timely intervention.
- After specialist confirmation, define mechanism and begin secondary prevention addressing antithrombotic therapy, atrial fibrillation, lipids, blood pressure, diabetes, smoking and relevant carotid disease.
Key red flags
Any neurological deficit still present, even if improving, requires emergency acute-stroke assessment and immediate brain imaging rather than a TIA clinic appointment.
Recurrent events during the same day, a fluctuating deficit or a suspected symptomatic high-grade carotid lesion needs urgent stroke-specialist escalation.
Thunderclap headache, meningism, anticoagulant-associated symptoms, head injury or reduced consciousness raises concern for haemorrhage or another emergency diagnosis.
New painful Horner syndrome, neck trauma or unilateral head and neck pain with focal symptoms suggests cervical artery dissection and warrants urgent angiographic imaging.
Transient monocular loss with jaw claudication, scalp tenderness or systemic inflammation in an older adult raises possible giant cell arteritis and threatens the other eye.
Investigation priorities
Identify a rapidly reversible mimic during or immediately after the focal episode.
Management branches
A patient reports a sudden focal neurological or monocular visual deficit that has now completely resolved.
- Confirm that no deficit remains, record last-known-well and symptom chronology, check glucose and observations, and seek emergency help if symptoms recur during assessment.
- Give aspirin 300 mg immediately unless allergy, active bleeding, current anticoagulation or another important contraindication requires urgent specialist advice.
- Refer through the local TIA pathway for specialist assessment within 24 hours without using ABCD2 to postpone care.
- Give clear return instructions for recurrent weakness, speech or visual symptoms and advise against driving pending application of current DVLA rules and specialist guidance.