Fainting might be passed down in the family: research

Researchers suggest, after a genetic study of families with multiple affected individuals across several generations, that autosomal dominant vasovagal syncope “may not be rare”.

They pinpointed susceptibility to a particular chromosomal region (15q26) but observed that triggers for fainting – such as sight of blood, a stuffy environment, prolonged standing, pain or dehydration – varied among individuals and might not be passed down.

Further research may lead to