hyperventilationˌhaɪ pərˌvɛn tlˈeɪ ʃən
hyperventilation (n)
- plural
- hyperventilations
hyperventilation
English Definitions:
hyperventilation (noun)
an increased depth and rate of breathing greater than demanded by the body needs; can cause dizziness and tingling of the fingers and toes and chest pain if continued
hyperventilation (Noun)
the state of breathing faster or deeper than necessary
Hyperventilation
Hyperventilation or overbreathing is the act of breathing faster or deeper than normal, causing excessive expulsion of circulating carbon dioxide. This causes the arterial concentration of carbon dioxide to fall below normal, raising blood pH and resulting in alkalosis. It can result from a psychological state such as a panic attack or cold shock, from a physiological condition such as metabolic acidosis, lifestyle risk factors or voluntarily as in the yogic practice of Bhastrika. Distinct from labored breathing when that is a natural response to higher than normal carbon dioxide levels. Chronic obstructive pulmonary disease, asthma and multiple panic disorders have also been identified. Hyperventilation can sometimes cause symptoms such as numbness or tingling in the hands, feet and lips, lightheadedness, dizziness, headache, chest pain, flexor spasm of hands and feet, slurred speech, nervous laughter, and sometimes fainting, particularly when accompanied by the Valsalva maneuver. Counterintuitively, such effects are not precipitated by the sufferer's lack of oxygen or air. Rather, the hyperventilation itself reduces the carbon dioxide concentration of the blood to below its normal level because one is expiring more carbon dioxide than what is being produced in the body, thereby raising the blood's pH value, initiating constriction of the blood vessels which supply the brain, and preventing the transport of oxygen and other molecules necessary for the function of the nervous system. At the same time, hypocapnia causes a higher affinity of oxygen to haemoglobin, known as the Bohr effect, further reducing the amount of oxygen that is made available to the brain.
Hyperventilation
Hyperventilation is irregular breathing that occurs when the rate or tidal volume of breathing eliminates more carbon dioxide than the body can produce. This leads to hypocapnia, a reduced concentration of carbon dioxide dissolved in the blood. The body normally attempts to compensate for this homeostatically, but if this fails or is overridden, the blood pH will rise, leading to respiratory alkalosis. The symptoms of respiratory alkalosis include: dizziness, tingling in the lips, hands or feet, headache, weakness, fainting, and seizures. In extreme cases it may cause carpopedal spasms, a flapping and contraction of the hands and feet.Factors that may induce or sustain hyperventilation include: physiological stress, anxiety or panic disorder, high altitude, head injury, stroke, respiratory disorders such as asthma, pneumonia, or hyperventilation syndrome, cardiovascular problems such as pulmonary embolisms, anemia, an incorrectly calibrated medical respirator, and adverse reactions to certain drugs. Hyperventilation can also be induced intentionally to achieve an altered state of consciousness such as in the choking game, during breathwork, or in an attempt to extend a breath-hold dive.
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"hyperventilation." Kamus.net. STANDS4 LLC, 2024. Web. 29 Mar. 2024. <https://www.kamus.net/english/hyperventilation>.
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