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L'hypoxie (du grec , et ) est une inadéquation entre les besoins tissulaires en oxygène et les apports. Elle peut être la conséquence de l'hypoxémie (diminution du taux d'oxygène dans le sang). Origine L'hypoxie peut avoir plusieurs origines :

l’accident de décompression ;
l’altitude ;
l’anémie ;
l’altération de l’hémoglobine (pigment destiné à fixer l’oxygène dans le sang) ;
l’intoxication par le monoxyde de carbone (CO) ;
l’intoxication du sang par certains éléments autres que le monoxyde de carbone ;
la pneumopathie (maladie des poumons) chronique ;
l’hypoventilation ;
la cardiopathie congénitale (malformation cardiaque depuis la naissance) ;
l’insuffisance cardiaque (insuffisance de fonctionnement de la pompe cardiaque dont la capacité ne suffit plus à envoyer une quantité de sang normale vers les organes, les tissus).

Cependant une hypoxie peut avoir d'autres origines, comme une insuffisance circulatoire. Physiologie animale et médecine

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