Fainting or blacking out, also known as syncope, is a temporary loss of consciousness due to insufficient blood flow to the brain. Elijah Behr, M.D., a cardiologist at Mayo Clinic Healthcare in London ...

Often dismissed as stress or dehydration, fainting can be the heart's first warning sign. Cardiologists caution that ...

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 ...

Unexplained fainting may signal heart problems, Dr. Richard Besser says Dec. 30, 2009— -- Showbiz star Marie Osmond famously fainted during an appearance on the ABC series "Dancing With the Stars ...

Fainting, or syncope, is often dismissed as harmless, but doctors warn it can be an early sign of heart failure. It occurs ...

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 ...

LONDON — 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 ...