
Your guide to stroke prevention
Revisado por pares por Dr Colin Tidy, MRCGPÚltima actualización por Lynn StephenLast updated 20 Oct 2025
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Every year, around 100,000 people in the UK have a stroke. Whilst there are around 1.4 million people in the UK who have survived a stroke many of these depend on others for their care as a result. Knowing your risk factors, getting them treated, and making simple changes to your lifestyle can cut your chance of stroke dramatically.
En este artículo:
Video picks for Accidente cerebrovascular
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How common are strokes?
Accidente cerebrovascular is the largest cause of disability in the UK. Whilst a stroke is often thought to only affect older people they can strike at any age - around one third of those who have a stroke are under the age of 65. The vast majority of strokes could be prevented if we all took simple steps to identify and reduce our risk factors.
Stroke survivors
Volver al contenidoA survey from the Stroke Association shows that nine in ten stroke survivors would go back in time and urge their younger self to make lifestyle changes which may have prevented their stroke. More than eight in ten of these people said they hadn’t realised that were susceptible to stroke.
All the changes these stroke survivors would have made are based on strong science - they're changes all of us can make to cut our chance of stroke.
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Can stress cause a stroke?
Volver al contenidoAlmost half said they would have taken steps to reduce their niveles de estrés. Stress itself can raise your blood pressure - a recurring theme, because high blood pressure is perhaps the single biggest health hazard for stroke.
But if you're stressed, you're also less likely to look after yourself. That means you're more prone to indulging in all the unhealthy behaviours that can increase your chance of stroke.
What's the link between high blood pressure and stroke?
Volver al contenidoTwo in five stroke survivors in the survey said they would have monitored their blood pressure. Presión arterial alta affects more than one in four UK adults. It's often known as 'the silent killer' because it rarely causes symptoms and therefore often isn't diagnosed. In fact, it's estimated that around five million people in the UK have untreated high blood pressure.
High blood pressure contributes to about half of strokes - it can damage your blood vessels, causing them to become harder and narrower. It can also cause weakened blood vessels to burst, leading to bleeding in the brain. Lifestyle changes - and, if these aren't enough, medicamentos - are highly effective at lowering blood pressure.
Cómo reducir la presión arterial
Making lifestyle changes
Lifestyle changes, including minor tweaks to your diet, can significantly reduce your blood pressure and with it your chance of stroke. The DASH diet has many similarities with the dieta mediterránea, but is specifically designed to help tackle high blood pressure.
Lowering your salt intake
Public Health England (now known as the UK Health Security Agency) reminds us that where blood pressure is concerned, excess salt in your diet is one of the most important health hazards you can change. A high salt diet disrupts the natural sodium balance in the body. This causes fluid retention, which increases the pressure exerted by the blood against blood vessel walls. If we all reduced our salt intake by just one gram a day, we could save more than 4,000 early deaths a year in the UK.
To reduce the salt in your diet, you can stop adding salt to your food. It's also important to remember that three quarters of the salt in your diet comes from salt in prepared foods you eat. Preserved foods - salamis, hams, bacon and pickles, along with salted peanuts and crisps, are all high in salt. Cooking from scratch means you know exactly how much salt is in your food. Using herbs, spices and lemon juice allows you to keep the flavour without ramping up the salt.
Can salt substitutes cut my chance of stroke?
It's the sodium in normal salt which increases your blood pressure, and it's possible to buy reduced sodium alternatives such as LoSalt in most supermarkets. Here, two thirds of the sodium is replaced by potassium.
In recent years there has been much interest in reduced sodium alternatives for people who still want the taste of salt.
A study of more than 20,000 over-60s showed that switching to a reduced sodium salt substitute:
Cut the chance of stroke by 14%, and of heart attack, stroke or heart failure by 13%.
Reduced the chance of dying by 12%.
Salt substitutes can be dangerous if you are at risk of developing high potassium levels in the blood, such as if you have kidney issues, and if you are taking certain medicines. Check with your doctor if you're unsure if they are safe for you.
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What's the link between exercise and stroke?
Volver al contenidoOne in three people surveyed would also have exercised more. Many people with high blood pressure are concerned that intense physical exertion might do more harm than good. In fact, the opposite is true. While your blood pressure may rise briefly when you're exercising, your blood pressure is likely to be lower overall if you exercise regularly.
In addition, regular exercise also strengthens your muscles - reducing the likelihood of falls - and helps you maintain mobility.
Does high cholesterol increase my chance of stroke?
Volver al contenidoMore than one in five stroke survivors wish they had monitored their blood cholesterol. Well known as a major risk factor for ataque al corazón, high cholesterol can also increase your chance of stroke.
A heart-healthy diet, low in saturated fat and higher in vegetables, fruit, unrefined carbohydrates and heart-healthy oils, can help protect against both heart attack and stroke. The dieta mediterránea and the Portfolio diet are excellent examples.
If you're over 40 and haven't had your cholesterol checked recently, speak to your community pharmacist, practice nurse or doctor - they can arrange a simple blood test.
Why do abnormal heart rhythms increase the chance of stroke?
Volver al contenidoFibrilación auricular (AF) is the commonest type of abnormal heart rhythm among people in the UK. AF increases the chance of a clot forming in your heart. Part of this clot can break off and travel to your brain, leading to a stroke.
The key symptoms of AF are:
Palpitations - feeling your heart beat fast.
Dolor en el pecho.
Falta de aliento.
Cansancio.
An irregular pulse - sometimes without any other symptoms.
See your doctor if you think you have any of these symptoms.
Without treatment, people with AF are up to five times more likely than other people to have a stroke. What's more, because the area of the brain affected by AF-related strokes is often larger than other strokes, they're often more severe. However, this probability is very greatly reduced by taking anticoagulantes - blood thinning medicines.
Con agradecimientos a la revista 'My Weekly' donde este artículo fue publicado originalmente.
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Historial del artículo
La información en esta página es revisada por pares por clínicos calificados.
Siguiente revisión prevista: 20 de octubre de 2028
20 Oct 2025 | Última versión
20 Mar 2023 | Publicado originalmente
Escrito por:
Dr Sarah Jarvis MBE, FRCGP

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