A comprehensive systematic review of several published studies concluded that people with certain blood types are more likely to have a stroke (cerebral vascular accident), known as ischemic stroke, before the age of 60.
The results were published Wednesday (31) in the Journal of Neurology of the American Neurological Society.
The work, called a meta-analysis, included 48 studies that looked at genetic factors and ischemic strokes (the most common type) in North America, Europe and Asia.
The available data were for about 600 thousand people, of whom 16.9 thousand had a stroke and 576.3 thousand had a stroke.
Of the 16,900, about 35% had an early stroke – before age 60 – while the rest, after that age, had a delayed stroke.
Researchers have found that there is a link between early stroke and a region of the chromosome that includes the gene that determines blood type A, AB, B or O.
They calibrated data for gender and other risk factors. In the end, they figured it out People with blood type A are 18% more likely to have a stroke. Before the age of 60 more than any other blood type.
on the other side, Type O blood carriers had 12% lower risk. Having a stroke before the age of sixty.
a Blood type B was also associated with a higher risk of an early stroke.
When looking at data from European subjects only, the study authors found the following:
• Early stroke occurred in 48% of people with type A blood.
• Among those who have a blood O 35%.
The study’s co-principal investigator, Stephen J. Kettner, a professor at the University of Maryland School of Medicine (USA), in a statement that the increased risk was very modest and that those with type A blood should not worry about getting the onset of stroke or having additional tests.
Some previous studies have already indicated that individuals with blood type A have a slightly higher risk of developing venous thrombosis in the legs, a condition caused by clots.
According to the researchers themselves, the mechanisms by which these people are more likely to have a stroke need better study.
Future research is needed to help develop a more accurate understanding of how stroke develops. This could lead to targeted preventive therapies for early stroke, which can lead to less disability during people’s most productive years, researcher Jennifer Jules Majersek, of the University of Utah and a member of the American Academy of Neurology, said in a statement. ..
An ischemic stroke is the most common and occurs when there is a blockage in a blood vessel in the brain, preventing oxygen from being transported to parts of an organ. When there is a rupture of a blood vessel, a stroke is called hemorrhagic – also the most serious type.
Although blood type has been linked to stroke in the study published today, there are known risk factors for the disease that include high blood pressure, high cholesterol, diabetes, smoking, obesity, physical inactivity, and substance abuse, for example.
Data from Arpen Brasil (Association of Natural Persons Registrar) shows that in the past year alone, 108,000 people died in the country from stroke, a slightly higher number than deaths from heart attacks (103,000).
The MSD Guide to Diagnosis and Treatment lists the following symptoms as the main symptoms of stroke:
Sudden weakness or paralysis on one side of the body (eg, half of the face, an arm or leg, or an entire side).
• Sudden loss of sensation or abnormal sensation on one side of the body.
• Sudden difficulty speaking, including difficulty finding words and sometimes unintelligible language.
• Sudden confusion accompanied by difficulty understanding language and speaking.
• Sudden dimming, blurred vision, or loss of vision, especially in one eye.
• Sudden dizziness or loss of balance and coordination leading to a fall.
People suspected of having a stroke need to seek medical attention urgently, because the longer it takes, the greater the risk of sequelae and death.
Know the signs of a stroke whose prompt care is crucial
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