Stroke Recognition: Why Every Minute Matters
Updated: 20 hours ago
Stroke is a medical emergency in which time is measured in brain tissue. When blood flow to part of the brain stops, nerve cells begin dying within minutes. Treatments that restore blood flow can dramatically reduce disability, but they only work within limited time windows. For paramedic and nursing students, that means the job is fast recognition, accurate information and early notification of the receiving hospital.
Two main types of stroke
Most strokes are ischaemic, caused by a clot blocking an artery that supplies the brain. A smaller proportion are haemorrhagic, caused by bleeding into or around the brain. The two cannot be reliably told apart without brain imaging, which is one reason hospital assessment is so urgent. A transient ischaemic attack, or TIA, causes stroke symptoms that resolve completely, usually within minutes to hours. A TIA is a warning sign of a high short term risk of stroke and still needs urgent medical assessment.
Time is brain
One widely cited estimate is that during a typical large vessel ischaemic stroke, the brain loses around 1.9 million neurons every minute that blood flow is not restored. Clot dissolving medication and mechanical clot retrieval can both improve outcomes, but the benefit falls steadily the longer treatment is delayed. Every step in the chain, from recognition to transport to the scan, counts.
The most important time you can record is when the patient was last known to be well.
FAST and BE FAST
FAST is the stroke recognition tool promoted by the Stroke Foundation in Australia:
Face: has their face drooped on one side?
Arms: can they lift both arms and hold them there?
Speech: is their speech slurred, and do they understand you?
Time: is critical. Act quickly and call for help.
FAST is simple and effective, but it can miss strokes affecting the back of the brain, where balance and vision problems may be the main features. BE FAST adds two letters at the start: Balance, a sudden loss of balance or coordination, and Eyes, sudden loss of vision or double vision. Research suggests adding these reduces the number of strokes missed by FAST alone. Other warning signs include sudden severe headache, sudden numbness or weakness on one side of the body and sudden confusion.
Rule out the mimics
Several conditions can look exactly like a stroke, and some are easily reversible. The most important is hypoglycaemia, so check a blood glucose level in every suspected stroke. Other mimics include seizures and the period of weakness that can follow them, migraine, sepsis and other infections in older people, and some drug effects. You should still treat the patient as a possible stroke until it has been ruled out.
What to find out
The information you gather can decide which treatments are possible. Focus on:
The time the patient was last known to be well, not the time they were found.
Exactly what symptoms appeared and whether they are improving or getting worse.
Medications, especially anticoagulants and antiplatelet drugs.
Recent surgery, bleeding, head injury or previous stroke.
Blood glucose level, blood pressure and a baseline neurological assessment.
A contact number for a family member or witness who can confirm the timeline.
Care while you wait or transport
Manage airway, breathing and circulation first. Keep the patient nil by mouth until a formal swallow screen has been done, because swallowing is often affected and aspiration is a real risk. Protect weak limbs, keep the patient comfortable and reassure them, as they may be frightened and unable to communicate. Notify the receiving hospital early according to your local stroke pathway so the team and scanner are ready on arrival.
Conclusion
Recognise stroke quickly with FAST or BE FAST, always check the blood glucose level, find out when the patient was last known well and get them to the right hospital without delay. Doing these basics well gives the patient the best chance of receiving treatment that can change the rest of their life.
References
Stroke Foundation. Clinical Guidelines for Stroke Management. Melbourne: Stroke Foundation.
Saver JL. Time is brain, quantified. Stroke. 2006;37(1):263.
Aroor S, Singh R, Goldstein LB. BE-FAST (Balance, Eyes, Face, Arm, Speech, Time): reducing the proportion of strokes missed using the FAST mnemonic. Stroke. 2017;48(2):479.
Powers WJ, Rabinstein AA, Ackerson T, et al. Guidelines for the early management of patients with acute ischemic stroke: 2019 update to the 2018 guidelines. Stroke. 2019;50(12):e344.
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Disclaimer: This article is general education for students. It is not medical advice, and it does not replace your service's clinical practice guidelines, your educators or your local protocols.
