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

Medically reviewed by Mary Josephine Hessert, DO Common triggers for vasovagal syncope include extreme heat and dehydration.Fainting episodes occur most frequently in people younger than 40 years old.

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 ...

We have an update now on the science of swooning. I often swoon when I hear our theme music by B.J. Leiderman. NPR's Jon Hamilton reports on evidence that fainting can be caused by a newly discovered ...

A woman living with postural orthostatic tachycardia syndrome (POTS) has shared footage of the moment she fainted and her new puppy immediately sprang into action. Whether she is lying on the couch, ...