Fainting runs in families, new study says

The following is an excerpt.

As a neurologist, Dr. Sam Berkovic sees many patients who frequently faint. These people say they feel weak in the knees after experiencing something unpleasant, perhaps seeing blood or being dehydrated. He began suspecting that fainting, also known as vasovagal syncope, runs in families.

And he appears to be on to something. A study by Berkovic, published today in the journal Neurology, finds that fainting may be genetic, and for some families only one gene causes it.

Read the full article here: Fainting runs in families, new study says

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