[Effects of ventilatory hyperoxia in the rat].
In rats anesthetized by pentobarbital, hyperoxia, induced by inhalation of 100% O2 for 5 minutes, provokes transient bradycardia and long lasting systemic arterial hypertension. Pure oxygen initially depresses ventilation for 3 minutes. Blockade of alpha 1 adrenergic receptors does not suppress arterial hypertension, which appears to be due to a direct vasoconstriction.
D000818:Animals; D001794:Blood Pressure; D006339:Heart Rate; D006985:Hyperventilation / Q000503:physiopathology*; D010100:Oxygen; D010313:Partial Pressure; D010646:Phentolamine / Q000494:pharmacology; D051381:Rats; D012119:Respiration
D010100:Oxygen; D010646:Phentolamine
Effets de l'hyperoxie ventilatoire chez le rat.