Study: being of this blood group increases the risk of stroke: are you from this group?

Presse Santé

A stroke is a medical emergency that can cause lifelong disability, and the risk of having a stroke can be increased depending on certain factors.
A recent study found that people with type A blood may be at increased risk of early stroke. Some factors, like blood type, can’t be changed, but people can work to change other risk factors for stroke to lower their chances of having a stroke. Strokes are medical emergencies that damage brain tissue. One of the most common types of stroke is ischemic stroke, which is characterized by an interruption in the blood supply to the brain.

A recent study published in Neurology found that people with type A blood had a higher risk of having a stroke before the age of 60 than people with type O blood. However, people can work to reduce their risk of stroke by controlling modifiable risk factors such as blood pressure and heart disease.

How serious are strokes?

A stroke is a specific event that damages the brain or causes the death of brain tissue. The most common type of stroke is ischemic stroke. Ischemic strokes occur when something, such as a blood clot, blocks the blood supply to the brain. Without an adequate blood supply, the brain cannot get the oxygen it needs, and brain cells die from lack of oxygen. The brain controls the rest of the body, so damage can have long-term consequences Trusted Source. For example, people may experience memory loss, blindness, or communication problems after a stroke. They may also have paralysis on the side of the body opposite the side of the brain affected by the stroke. Identifying risk factors for stroke can help raise awareness and hopefully prevent strokes.

Blood groups that influence the risk of stroke

Certain factors increase the risk of stroke. However, there are risk factors that experts may not have identified and risk factors that are not fully understood. One area of ​​interest is how blood type may increase the risk of stroke. In this study, the experts looked at blood type and its association with the risk of early ischemic stroke (CVA). Early-onset strokes are strokes that occur in people before the age of sixty. The researchers performed a meta-analysis of genome-wide association studies. They included research from 48 studies, ultimately analyzing data from 16,730 stroke cases and 599,237 non-stroke control participants.
Including everything in the analysis, the strongest association for stroke risk was with blood types A and O.

The study found that people with type A blood had a higher risk of early stroke. People with stroke were also more likely to have type B blood compared to the control group. In contrast, people with type O blood had a lower risk of stroke, including early stroke. This risk of stroke could be related to an increased risk of blood clots in people with type A blood.

The researchers explain in a press release:

“We compared genetic differences between 16,730 young adult ischemic stroke victims and approximately 600,000 non-stroke controls and found significant differences between the two groups in the frequency of genetic variants that code for the ABO blood group. Specifically, cases were more likely than controls to have variants coding for blood group A and less likely to have variants coding for blood group O. […] “.

The results indicate that blood groups may mark increased susceptibility to early stroke, possibly by increasing susceptibility to thrombosis. “We found that blood types A and O were also more strongly associated with early than late onset of venous thromboembolism (VTE), another prothrombotic condition. In contrast, genetic risk of VTE was also more strongly associated with early-onset stroke than late-onset. »

Study limitations

This study was limited in several respects. First, the study included mainly participants of European descent. This implies that a more diversified follow-up is necessary. The study was also unable to determine the cause of this link between blood types and stroke, so further data collection may focus on causal factors rather than associations.

How to reduce the risk of stroke

Although you can’t change your blood type, there are other stroke risk factors you can control to lower your risk. For example, high blood pressure, diabetes mellitus, high cholesterol, smoking, and obesity are risk factors for stroke. People can take steps to modify these risk factors and thus reduce their risk of stroke, even if they have a blood type that may be more susceptible to stroke.

For example, people can follow recommendations for a healthy diet and exercise regularly to help reduce their risk of stroke. People can be in close contact with their doctor and other medical professionals to move towards a healthy lifestyle and address possible health problems.

Changes in lifestyle

Some strategies to prevent first strokes and reduce the risk of recurrence. Up to 80% of strokes may be “preventable” with the following lifestyle changes:

– Give up smoking

– For people with high blood pressure, take and record daily measurements with a home blood pressure monitor.

– Adopt a Mediterranean-style diet rich in fruits, vegetables, whole grains, fish and nuts.

– Exercise regularly in any form, even if it’s just 10 minutes a day at first.

– Know your cholesterol level

– be consistent in maintaining these interventions for a healthy lifestyle.

This study adds to the body of knowledge about non-modifiable risk factors for cerebrovascular disease. Healthy lifestyle interventions can go a long way in preventing the onset or progression of cerebrovascular disease. Start early. 10-15% of strokes occur in adults under 50 years of age.

* Presse Santé strives to transmit health knowledge in a language accessible to all. In NO CASE, the information provided can not replace the advice of a health professional.

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