Depends: Passing out is common and common causes are emotion, dehydration, medications. Depending on age abnormalities of heart rhythm become more prevalent. Rare entities such as cardiomyopathy are possible in younger patients. If first episode and there is a clear precipitant it is probably not necessary to see doc. If this is recurrent or there is no clear explanation see doc soon.
Answered 6/27/2013
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4 doctors weighed in across 3 answers
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