Hyperventilation

In physiology hyperventilation can mean the following:

Hyperventilation is a state of decreased ratio of carbon dioxide production to alveolar respiration.
Hyperventilation is a physical action characterized by increased release of a substance. The term is usually applied to a biological response to stress within the lungs of a living animal.
It often refers to attacks of the hyperventilation syndrome, characterized by deep breathing, chest pain, and altered sensations of the fingers and lips.

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