A Transient Ischaemic Attack (TIA): Warning Stroke That Should Never Be Ignored
Posted on in Medical Negligence
A transient ischaemic attack, commonly known as a TIA or "mini-stroke", is often described as a warning sign that a more serious stroke may be about to happen.
Although the symptoms usually disappear within minutes or hours, a TIA is a medical emergency. It should never be dismissed simply because the person feels better afterwards.
Prompt assessment and treatment can dramatically reduce the risk of a further TIA or a life-changing stroke.
What is a TIA?
A TIA occurs when the blood supply to part of the brain is temporarily interrupted, usually by a small blood clot. Unlike a stroke, the blockage clears quickly, and the symptoms resolve quickly.
Typical symptoms include:
- Sudden weakness or numbness affecting the face, arm or leg, usually on one side of the body.
- Difficulty speaking or understanding speech.
- Sudden loss of vision or blurred vision in one or both eyes.
- Dizziness or loss of balance.
- Sudden confusion.
Even if these symptoms last only a few minutes, they should always be treated as a medical emergency.
Why is a TIA so important?
A TIA provides a vital opportunity to prevent a stroke.
The risk of suffering a stroke is highest in the hours and days immediately following a TIA.
This is why National Guidelines recommend that patients with suspected TIA are assessed urgently, investigated promptly and started on appropriate treatment without unnecessary delay.
Treatment may include:
- Antiplatelet medication, such as aspirin.
- Medication to reduce cholesterol.
- Blood pressure management.
- Investigation for an underlying heart rhythm problem, such as atrial fibrillation.
- Scans to assess the arteries supplying the brain, particularly the carotid arteries.
- In some cases, urgent surgery to remove narrowing of the carotid artery.
When these steps are taken promptly, many strokes can be prevented.
When can things go wrong?
Because TIA symptoms often disappear before medical assessment takes place, they can sometimes be mistaken for less serious conditions such as migraine, anxiety, dizziness or simple fainting.
Opportunities to prevent a stroke may be missed if healthcare professionals fail to:
- Recognise the symptoms of a TIA.
- Appreciate that symptoms have resolved but still require urgent investigation.
- Arrange prompt referral to a specialist TIA clinic.
- Prescribe appropriate medication while investigations are being arranged.
- Investigate the underlying cause.
Delays of even a few days can sometimes make a significant difference.
Example Case Study
Julie, a 58-year-old librarian, experienced sudden weakness in her left arm while making breakfast. She also found that her speech became slurred for around 20 minutes before returning completely to normal.
Concerned, her husband took her to their GP later that morning. As her symptoms had resolved, she was reassured that it was probably stress or a viral illness. No aspirin was prescribed, and no urgent referral to a specialist TIA service was arranged.
Over the following two weeks, Julie experienced two further episodes of temporary weakness and blurred vision. Again, no investigations were organised.
Three weeks after her first symptoms, Julie suffered a major ischaemic stroke, leaving her with permanent weakness down her left side and significant difficulties with speech. She required lengthy rehabilitation and was unable to live independently.
Subsequent hospital investigations identified severe narrowing of her right carotid artery.
Independent medical experts later concluded that had Julie been referred urgently following her first TIA, the narrowing would probably have been identified. Early treatment, including medication and timely carotid surgery, would more likely than not have prevented the stroke.
Could this amount to medical negligence?
Not every stroke following a TIA is avoidable. Some patients suffer a stroke despite receiving prompt and appropriate treatment.
However, medical negligence may arise where there has been a failure to recognise the warning signs of a TIA, arrange urgent assessment, investigate the underlying cause or commence appropriate preventative treatment.
To bring a successful claim, it is necessary to show both that the standard of care fell below what would reasonably be expected and that earlier diagnosis or treatment would probably have prevented the stroke or reduced its severity.
Every case depends on its own facts and requires careful review by independent medical experts.
Recognising a TIA can save a life
A TIA should never be viewed as a harmless event simply because the symptoms disappear.
It is often the body's final warning that a more serious stroke is imminent. Acting quickly gives doctors the opportunity to identify the underlying cause and begin treatment that can significantly reduce the risk of permanent brain injury.
The Stroke Association are the UK's leading stroke charity, offering information about stroke and TIA, practical advice for patients and families, and access to specialist support services and a dedicated Stroke Support Helpline.
For patients and families whose lives have been changed by stroke, understanding whether opportunities to prevent that stroke were missed can be an important step in obtaining answers and accountability.
If you or a family member has been affected by medical negligence, contact our specialist medical negligence lawyers; we will help you to recover appropriate compensation and secure your future.