Syncope (also known as fainting or passing out) is defined as a loss of consciousness due to a decrease in blood flow to the brain. Common causes are vasovagal response (when the body overreacts to certain emotional triggers, such as the sight of blood) and cardiac dysrhythmias (irregular heart rate).
Questions tagged [syncope]
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Is fainting more common in young men during blood lettings, and if so, why?
I recently underwent a blood test, and during the third vial I passed out. I awoke just as the sixth was being finished and could not immediately stand. The vials were small, only 5ml each if I remember right, and the blood letting was at an NHS…
Lewis Goddard
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