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  • Title: Cardiac output distribution and intrarenal haemodynamics: role of thromboxanes.
    Author: Hably C, Menz V, Bartha J.
    Journal: Acta Physiol Hung; 1991; 78(1):89-98. PubMed ID: 1763653.
    Abstract:
    The effects of imidazole, an inhibitor of thromboxane synthesis, were studied on the distribution of cardiac output and on the intrarenal haemodynamics in anaesthetized, furthermore on the salt and water excretion in conscious rats. Imidazole treatment (10 mg/100 g b.m., intraperitoneally, twice a day for two days) failed to influence the arterial blood pressure, the cardiac output and its distribution in organs investigated (heart, muscle, lung [bronchial fraction], skin, liver, spleen, small intestine, adrenal gland and kidneys). The medullary blood flow increased, while cortical blood flow remained unchanged, but the intrarenal percentile blood flow shifted towards the medulla. Imidazole elevated the water turnover in the animals, but no change in sodium and potassium excretion occurred. It is supposed that thromboxanes may affect the renal medullary vascular tone without altering the vascular smooth muscle activity in other organs.
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