A breakdown of the most common medical causes of fainting and how the body responds during an episode.

Vasovagal syncope is the most common type of fainting, a temporary loss of consciousness. It's a condition that happens when your blood pressure and heart rate suddenly drop, delivering less oxygen to ...

The ED evaluation of syncope necessitates obtaining a careful history to determine whether such causes as intoxication, sepsis, migraine, or seizure are likely. Physical examination will aid in ...

Most fainting episodes are harmless, but some may be early warning signs of serious heart conditions that need prompt medical attention.

Whether as a result of heat, hunger, standing for too long, or merely at the sight of blood or needles, 40% of people faint at least once in their lifetime. But exactly what causes these brief losses ...

Establishing the cause or causes of syncope serves two principal purposes. First, an etiologic diagnosis permits assessment of prognosis and risk of recurrence, both issues of great concern for ...

They can cause fitting activity, and differentiating a seizure and epilepsy from fainting requires involvement of a cardiologist and neurologist." If you faint at the sight of blood, you might ...

Add Yahoo as a preferred source to see more of our stories on Google. A sudden restriction of blood flow to the brain. That's how scientists have traditionally explained why people faint. But several ...

You may have heard that people who feel faint should sit with their heads between their knees, but is that true? And how can you tell whether you or someone else who has fainted should go to the ...