Understanding Mini Strokes: A Critical Health Alert
Mini strokes, also known as transient ischaemic attacks (TIAs), can present a range of alarming symptoms such as facial drooping, arm paralysis, and difficulty speaking. These symptoms often serve as early warning signs that a more severe stroke might be on the horizon. Despite this, many people remain unaware of the risks associated with TIAs.
Each year, approximately 46,000 Britons experience their first TIA. However, many dismiss these episodes as minor or temporary, believing them to be ‘just a funny turn.’ This is because the symptoms—such as vision changes, vertigo, nausea, dizziness, balance problems, difficulty swallowing, and confusion—can last only a few minutes.
It’s crucial to understand that a mini stroke is a serious medical emergency. If you suspect a TIA, seeking immediate help is vital. TIAs occur when the brain experiences a temporary disruption in blood flow, leading to a lack of oxygen. This can trigger symptoms similar to those of a full stroke.
Dr Tom French, a stroke consultant at NHS Forth Valley, describes mini strokes as “a heart attack of the brain.” He explains that in the UK, if symptoms resolve within 24 hours, it is typically classified as a TIA. While strokes and TIAs share many symptoms, strokes can persist for longer than 24 hours.
To help identify the warning signs of a stroke, many health organisations promote the acronym BE FAST. This stands for Balance, Eyes, Face, Arms, and Speech, with T representing ‘Time to act fast.’ However, Dr French notes that identifying the exact signs of a TIA can be challenging, as symptoms often overlap with other conditions.
For example, older individuals experiencing facial drooping may be misdiagnosed with a TIA when the real cause is low blood pressure linked to postural hypotension—a condition that can lead to dizziness, blurred vision, and weakness. Although most TIA patients are aged 50 or older, Dr French has treated younger patients in their 20s who initially thought they were suffering from migraines.
Studies have shown that up to one in five suspected TIA patients may have migraines with aura, which can cause visual disturbances and sensations down the arms or legs. Dr French warns that if you suspect a stroke, you should seek immediate medical attention. These are clinical diagnoses, and self-diagnosis can be dangerous.
Younger individuals may also be at higher risk if they have a patent foramen ovale, a hole in the heart that remains open in some people. The NHS states that this condition affects up to one in four individuals and can increase the risk of blood clots forming and traveling to the brain, potentially causing a TIA.
Among older adults, atrial fibrillation—a condition where the heart beats irregularly—is a significant cause of mini strokes. Dr French explains that when the heart does not beat properly, it can create pools of blood near the heart, which can form clots and travel to the brain, triggering a TIA.
The NHS advises that it is essential to consult a healthcare professional as soon as possible if you believe you’ve had a TIA. Once assessed, patients are usually given aspirin to prevent further clotting and referred to a specialist within 24 hours of symptom onset.
Because TIAs often pass quickly, many patients no longer have symptoms when seen by a doctor. However, Dr French looks for patterns in how the brain has been affected during assessments. For instance, a TIA on the left side of the brain is more likely to cause speech issues.
Dr French highlights that many TIAs are influenced by lifestyle choices made in early adulthood, with consequences often appearing later in life. He notes that factors like high cholesterol and high blood pressure contribute to TIAs, and poor dietary choices, such as relying on microwave meals high in salt, can exacerbate these issues. Processed foods can play a significant role in increasing the risk of TIAs over the next 20 to 30 years.
The NHS recommends maintaining a healthy diet, exercising regularly, avoiding smoking, and limiting alcohol intake to reduce the risk of TIAs. These lifestyle changes can help prevent issues like atherosclerosis, high blood pressure, and high cholesterol, all of which are risk factors for TIAs.
If you have already experienced a TIA, making these changes can also help lower your risk of having a full stroke or another TIA in the future.
