A suspected TIA (mini-stroke): a case-based approach

The case: a face that drooped, then recovered

Imagine a 68-year-old man whose partner notices that during breakfast one side of his face suddenly droops and his speech becomes slurred. He struggles to lift his right arm. Frightened, they watch as the symptoms fade over about fifteen minutes, and he insists he is "fine now" and does not want a fuss. In the teaching setting, this is a classic suspected TIA: sudden, one-sided, stroke-like symptoms that resolve. The crucial teaching point is that recovery does not mean safety. A TIA is a warning shot — the risk of a full stroke in the days afterwards is real and highest early on. The correct response is to call 999, not to wait and see.

Spot it fast: the FAST test

The FAST test is the simple way to recognise a stroke or TIA. F is for Face: has their face fallen on one side, can they smile, has their mouth or eye drooped? A is for Arms: can they raise both arms and keep them there, or does one drift down? S is for Speech: is their speech slurred or muddled, can they speak at all, do they understand you? T is for Time: if you see any single one of these signs, it is time to call 999 immediately. Other sudden symptoms can include numbness on one side, sudden confusion, trouble seeing, dizziness or loss of balance, and a sudden severe headache. Even if signs disappear quickly, treat FAST as an emergency.

Why recovery does not mean safe

The reassuring part of a TIA — that symptoms disappear — is exactly what makes it dangerous, because it tempts people to ignore it. In a TIA the blood supply is only briefly interrupted, so the brain is not permanently damaged and symptoms resolve. But the underlying problem that caused it, such as a small clot or narrowed artery, is still there. That means a full, damaging stroke can follow, and the risk is highest in the first hours and days. Getting assessed urgently allows doctors to find and treat the cause — for example starting medicines to prevent clots or treating a narrowed neck artery — which greatly lowers the chance of a stroke. This is why a TIA is never something to shrug off.

What happens after 999

When you call 999 for stroke-like symptoms, the ambulance service treats it as an emergency. If symptoms are still present it may be a stroke, which needs immediate hospital treatment where every minute counts. If symptoms have fully resolved and a TIA is suspected, the person still needs urgent assessment, usually within 24 hours, and is often started straight away on a medicine such as aspirin unless told otherwise. In a specialist TIA clinic or hospital, tests may include brain and blood vessel scans, heart rhythm checks and blood tests to find the cause. Treatment is then tailored to prevent a stroke — for instance clot-preventing medicines, blood pressure and cholesterol treatment, and sometimes a procedure on a narrowed artery. Fast action makes these preventive steps far more effective.

Lowering future risk

After a TIA, the focus is on preventing a stroke, and much of this is within reach. Clinicians usually treat the causes: managing high blood pressure, lowering cholesterol, controlling diabetes, and starting medicines to prevent clots. If an irregular heart rhythm called atrial fibrillation is found, specific anticoagulant treatment may be needed. Stopping smoking is one of the most powerful steps, along with cutting down alcohol, being more active, eating a healthier diet and reaching a healthier weight. It is also important not to drive until told it is safe, and to follow the advice given about when driving can resume. Attending all follow-up appointments and taking preventive medicines as prescribed makes a big difference to long-term risk.