Roger Sanders said:Actually, yeah, that could be it. Thanks for the heads-up. I was leaning toward epilepsy because she had it as a kid and was on medication for it. They stopped the treatment a long time ago since there weren't any issues.
On another note, do you know if syncope can just happen instantly? Like, without any warning signs? Does it always involve that dizzy, blacking-out feeling before someone collapses, or can they just lose consciousness and hit the floor in a split second?
Syncope refers to a sudden loss of consciousness, whereas pre-syncope is that sensation of vision darkening without actually losing consciousness (which is what you mentioned happens to you).
It is entirely possible for a person to lose consciousness abruptly, it’s possible to experience only the "blackout" sensation, or perhaps a combination of both the darkening vision followed by the loss of consciousness.
Once consciousness is lost, a full recovery typically occurs within a few minutes.
The causes of syncope can vary widely; many instances are relatively benign, such as standing up too quickly, a drop in blood pressure, heat exhaustion, or being in a cramped space, though they can also stem from more serious conditions, such as cardiovascular disease.
Since there is a history of epilepsy treatment, it would probably be wise to have that looked into as well.