Even though identical twins were more likely to report outside triggers for their attacks, it wasn't always the same trigger for both twins, Berkovic says.
But puzzlingly, people sometimes black out in response to some kind of outside the body trigger, like the sight of blood or after some kind of emotional upset. This is called vasovagal syncope.
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cause the fainting," he tells WebMD.
develop better treatments for that, that would be great," says researcher Samuel F. Berkovic, MD, a neurologist and professor in the department of medicine at the University of Melbourne, in Australia.
The study, which is published in the journal Neurology, suggests that in some cases, fainting may be inherited. If researchers can identify the genes involved, they say it may point to a way to help the small percentage of people who pass out so regularly that it interferes with their lives.
"A small proportion of people with fainting actually have a disabling problem. They have a lot of fainting attacks, and it makes life a little challenging for them. And if we can Lv Monogram Wallet
The Genetic LinkResearchers in Australia interviewed 51 same sex sets of twins for the study. Some of the twins were identical. The others were fraternal twins. At least one twin in each pair reported passing out at some point in their lives.
The frequency of fainting among non twin relatives in the same family was much lower, suggesting a complex interaction between many genes that all have to be inherited together, rather than just one or two.
Researchers found that both members of a set of identical twins were more than twice as likely to be prone to fainting spells compared to fraternal twins. Their fainting was also Louis Vuitton Sunglasses Men 2018
more likely to be triggered by something external, like a stressful event or the sight of blood, rather than by a biological problem like dehydration.
Fainting May Run in Volta Lv the Family
"The evidence is that the genetic factors are more [responsible for] . the fainting rather than the triggers that Lv Alma Mm
Fortunately, fainting isn't usually dangerous. Most people usually wake up a few seconds after they pass out, but they may fall in the process. Falling during a fainting spell, however, can lead to injuries.
About 1 in 4 people will faint at some point in their lives. Fainting is a sudden, brief loss of consciousness after blood pressure drops to the brain. Sometimes, that loss of blood pressure happens for internal reasons dehydration or heart problems, for example.
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