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Hyperventilation, paradoxically: self-induced hypocapnia, such as in the fainting game or in shallow water blackout. Overexertion; Panic attack; Recovery is usually rapid. A greyout can be readily reversed by lying down as the cardiovascular system does not need to work against gravity for blood to reach the brain.
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 ]
Heat syncope is fainting or dizziness as a result of overheating (syncope is the medical term for fainting). It is a type of heat illness. The basic symptom of heat syncope is fainting, with or without mental confusion. [1] Heat syncope is caused by peripheral vessel dilation, resulting in diminished blood flow to the brain and dehydration.
Continued oxygen deprivation results in fainting, long-term loss of consciousness, coma, seizures, cessation of brain stem reflexes, and brain death. [7] Objective measurements of the severity of cerebral hypoxia depend on the cause. Blood oxygen saturation may be used for hypoxic hypoxia, but is generally meaningless in other forms of hypoxia ...
Syncope (medicine), a loss of consciousness, also known as fainting Freediving blackout , a loss of consciousness caused by cerebral hypoxia towards the end of a breath-hold dive Transient global amnesia , a temporary inability to establish new memories with otherwise unimpaired cognitive functions
Today's Wordle Answer for #1248 on Monday, November 18, 2024. Today's Wordle answer on Monday, November 18, 2024, is FRAIL. How'd you do? Next: Catch up on other Wordle answers from this week.
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.
Most Americans are concerned about what may happen to Social Security when its retirement trust fund crosses a projected 2033 depletion date, according to a new Bankrate survey.