Parathyroid Hormone and the Altered Vascular Response to Norepinephrine in Uremia

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Abstract
Patients with chronic renal failure manifest reduced pressor response to norepinephrine (NE); this abnormality is at least partly responsible for the autonomic nervous system dysfunction observed in these patients. Since uremia is associated with increased levels of parathyroid hormone (PTH) and since PTH blunts the pressor effect of NE most likely via activation of prostaglandins, we have studied the relationship between blood levels of PTH and the reduced pressor response to NE in 17 uremic patients and we examined the effect of treatment with indomethacin on the response to NE in 9 uremic and 5 normal subjects. There was a significant negative correlation (r = -0.63, p

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