Recent advances in studies on cardiac structure and metabolism · 1975
Force development of isoproterenol-damaged frog heart muscle in cyanide anoxia.
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Carlsten A, Poupa O
Аннотация
From recent experiments it is indicated that in frogs living at +25 degrees C the abnormal response to cyanide anoxia appears as soon as 4-5 hr after the first isoproterenol (IPR) injection, but the aneurysm does not appear until a few hours after the second injection of IPR. There is evidently a discrepancy between the biochemical and structural effects of IPR on the heart. The biochemical effects are probably transient as we have observed that a normal response to cyanide reappears a few weeks after the second IPR injection. It might thus be concluded that IPR causes derangement to the cells also in hearts without any visible lesions and demonstrated as a lowered resistance to histotixic anoxia. This effect precedes any structural damage if such should occur and is of a transient nature.