Stroke before age 60: Do you have a blood type at risk? – Science and future

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There are two types of stroke. Hemorrhagic stroke occurs when an artery in the brain ruptures and the blood flow causes brain cells to die. Ischemic stroke is characterized by the blockage of an artery. It may be blocked by a blood clot or fatty deposit. The obstructed area is no longer irrigated with blood. Without oxygen supply, the area can be irreversibly affected. To find out who might be more likely to suffer an ischemic stroke before the age of 60, the University of Maryland conducted a large meta-analysis published in the specialist journal Neurology. Their results suggest that there is indeed a difference in risk according to blood type. “Most strokes occur at older ages. Therefore, we chose a cut-off of 60 years for our study, in part to include cases of stroke that are relatively young compared to the age at which they usually develop strokes,” explains Dr. Braxton Mitchell, specialist in epidemiology and public health at Sciences et Avenir. For this, the team reviewed 48 written studies on the subject, including 17,000 stroke victims and 600,000 control patients, who never had an ischemic stroke. They were all between 18 and 59 years old. More at risk than O The results showed that there is indeed a difference according to blood groups. People with type A had a 16% higher risk of early stroke than those with different blood types. People with blood type B had an 11% higher risk of stroke. People with type O were 12% less likely to have an early stroke than those with other blood types. In addition, the link between blood group and the occurrence of a stroke was very marked for early strokes. But this link was found to be weaker for strokes that occur later in life. The researchers used another data sample of 9,300 people with stroke and 25,000 without stroke, all over the age of 60 this time. It turned out that with age, the link between group A and increased risk no longer appeared significant. Group B still had a greater risk of 11%, as did patients under 60 years of age. Why would group A be more at risk than group O before age 60? The team, for now, has not determined a cause. “However, we believe that blood type predisposes people to clotting,” explains Dr. Mitchell to Sciences et Avenir. Excessive blood coagulation causes the appearance of blood clots, responsible for the appearance of ischemic strokes. “We also find that blood type A is associated with early venous thromboembolism, another bleeding disorder.” Another clue that could guide researchers in future work. Don’t worry if you’re type A The authors of the study are formal: people with blood type A shouldn’t worry too much. There is no need to undergo a screening test or special medical examinations. “It is important to emphasize that people with blood type A should not be particularly concerned about their risk of stroke. Blood type is a much weaker risk factor than other modifiable stroke risk factors, such as blood pressure high and smoking. For people who want to reduce their risk of stroke, these are the main factors to consider.” Regardless of your blood type, taking care of your high blood pressure and stopping smoking are the two most important ways to deal with your risk of stroke. Specialists also do not exclude that blood type A accentuates the effects of hypertension and smoking on strokes; they highlight the need for further studies to better understand the phenomenon. Note that during a study on Covid-19, group O also appeared to be more protective, while group A was more at risk.
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