Jisho

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Noun
1. hyperventilation; overbreathing; hyperpnea; overventilationAbbreviation, See also 過換気症候群
Wikipedia definition
2. HyperpneaHyperpnea or hyperpnoea is increased depth of breathing when required to meet metabolic demand of body tissues, such as during or following exercise, or when the body lacks oxygen, for instance in high altitude or as a result of anemia. Hyperpnea may also occur as a result of sepsis, and is usually a sign of the beginning of refractory sepsis. Tachypnea differs from hyperpnea in that tachypnea is rapid shallow breaths, while hyperpnea is deep breaths.
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