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  • Title: Effect of acute water loading on plasma levels of antidiuretic hormone AVP aldosterone, ANP fractional excretion of sodium and plasma and urine osmolalities in myxedema.
    Author: Bai Y, Liu XM, Guo ZS, Dai WX, Shi YF, Zhou XY.
    Journal: Chin Med J (Engl); 1990 Sep; 103(9):704-8. PubMed ID: 2147645.
    Abstract:
    We monitored the plasma and urine osmolalities, fractional excretion of sodium, fractional excretion of chloride, plasma levels of antidiuretic hormone (ADH, AVP), aldosterone and atrial natriuretic peptide (ANP) before and after acute water ingestion in 12 patients with overt hypothyroidism. The ability of the patients to dilute and concentrate urine was found impaired and the ability of excretion of water load decreased and delayed. Acute water load test was proved to be effective in evaluating the urinary excreting function for the patients. We hypothesize that inappropriate secretion of anti-diuretic hormone and elevated plasma ANP may be homeostatic factors for abnormal urinary excretion in patients with hypothyroidism.
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