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Acta Neurol Scand. 1993 Mar;87(3):234-8.

Abnormal arginine-vasopressin secretion and water metabolism in patients with postviral fatigue syndrome.

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Department of Neurology, University of Glasgow, Scotland.


Water metabolism and the responses of the neurohypophysis to changes in plasma osmolality during the water loading and water deprivation tests were studied in nine patients with postviral fatigue syndrome (PVFS) and eight age and six-matched healthy control subjects. Secretion of arginine-vasopressin (AVP) was erratic in these patients as shown by lack of correlation between serum and urine osmolality and the corresponding plasma AVP levels. Patients with PVFS had significantly low baseline arginine-vasopressin levels when compared with healthy subjects. Patients with PVFS as a group also showed evidence of increased total body water content. These results may be indicative of hypothalamic dysfunction in patients with PVFS.

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