• A pulmonary ventilation rate faster than is metabolically necessary for the exchange of gases. It is the result of an increased frequency of breathing, an increased tidal volume, or a combination of both. It causes an excess intake of oxygen and the blowing off of carbon dioxide.
  NLM Medical Subject Headings
  U.S. National Library of Medicine, 2025
• Abnormally prolonged, rapid, and deep breathing.
  NCI
  U.S. National Cancer Institute, 2021
• An increase in ventilation manifested by hypocapnea and respiratory alkalosis.
  NICHD Pediatric Terminology
  U.S. National Cancer Institute, 2021
• Excessive breathing, generally associated with anxiety, which can reduce blood carbon dioxide concentration and can produce lightheadedness, palpitations, numbness, tingling periorally and in the extremities and occasionally, syncope.
  Sadock's Comprehensive Glossary of Psychiatry and Psychology
  BJ Sadock Titles Press, 2012
• Hyperventilation refers to an increased pulmonary ventilation rate that is faster than necessary for the exchange of gases. Hyperventilation can result from increased frequency of breathing, an increased tidal volume, or both, and leads to an excess intake of oxygen and the blowing off of carbon dioxide.
  Human Phenotype Ontology (HPO)
  The Human Phenotype Ontology Project, 2025
• Hyperventilation, sustained abnormal increase in breathing. During hyperventilation the rate of removal of carbon dioxide from the blood is increased. As the partial pressure of carbon dioxide in the blood decreases, respiratory alkalosis, characterized by decreased acidity or increased alkalinity...
  Encyclopedia Britannica
  Encyclopedia Britannica, Inc., 2025