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Syncope ((syncope ⓘ), commonly known as fainting or passing out, is a loss of consciousness and muscle strength characterized by a fast onset, short duration, and spontaneous recovery. [1] It is caused by a decrease in blood flow to the brain , typically from low blood pressure . [ 1 ]
Reflex syncope can occur in otherwise healthy individuals, and has many possible causes, often trivial ones such as prolonged standing with the legs locked. [citation needed] The main danger of vasovagal syncope (or dizzy spells from vertigo) is the risk of injury by falling while unconscious.
Heart rhythm problems — this is a much more serious cause of passing out, and people can faint with no warning, McGowan says. It’s much more common in older people or patients with heart disease.
In the circumstances where a person has fallen into suspension on a rope/lanyard and has become unconscious, it is thought that the unconscious state "syncope" is due to a combination of orthostasis or motionless vertical suspension, with "pre-syncope" being the state before the person becomes unconscious where the fallen person may experience ...
A choke-out is a hand-to-hand combat tactic involving the use of a chokehold to cause syncope, or temporary loss of consciousness, at which point the choke is released.. Common chokeholds in grappling used to accomplish a choke-out include the rear naked choke, arm triangle, triangle choke, and the guil
Reflex asystolic syncope (RAS) is a form of syncope encountered mainly, but not exclusively, in young children. Reflex anoxic seizures are not epileptic seizures or epilepsy . [ 1 ] This is usually a consequence of a reduction in cerebral perfusion by oxygenated blood .
Lightheadedness is very similar to pre-syncope. Pre-syncope is the immediate stage before syncope (fainting), particularly in cases of temporary visual field loss (i.e. vision getting "dark" or "closing in").
Water intoxication is serious and can be fatal. It's known medically as hyponatremia; this happens when a person drinks so much water that the electrolytes in their blood become diluted, ...