Fainting, or passing out, is referred to medically as a syncopal episode or syncope. They’re typically triggered by a sudden, temporary drop in blood flow to the brain, leading to loss of ...

Also known as the "common faint," vasovagal syncope (pronounced vay-zoh-Vay-gul Sing-kuh-pee) results from an abnormal circulatory reflex and could be caused by a number of factors. In vasovagal ...

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 ...