Abstract:1 The effects of phentolamine, an ax-adrenoceptor blocking agent and amosulalol, an a1 and fadrenoceptor antagonist on hypoxia-induced impairment in cardiac function and metabolism were examined using the isolated heart Langendorff preparation of the rabbit. 2 Hypoxia induced cessation of cardiac contractile force, a rise in resting tension, a decrease in myocardial high-energy phosphates, an increase in tissue calcium content and the release of ATP metabolites from the heart. Subsequent reoxygenation resulted… Show more
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