The effect of minor increments in plasma thyroxine on heart rate and urinary sodium excretion.

Abstract:

:We studied day/night (D:N) patterns of urinary sodium excretion and the 24 hour ambulatory electrocardiogram in seven normal subjects before and during the administration of T4. Thyroxine increased thyroid hormone levels within the normal range and inhibited the plasma TSH response to TRH. This was associated with a significant decrease in D:N sodium excretion (P less than 0.01) and D:N urine flow (P less than 0.01), a significant increase in mean nocturnal heart rate (P less than 0.01), and a lesser increment in mean daytime heart rate (P less than 0.05). These responses to small changes in thyroid hormone levels suggest that the anterior pituitary is not alone in recognising minor thyroid hormone excess. The clinical implication is that some patients with a normal T3 and T4 but an impaired TSH response to TRH might benefit from antithyroid treatment.

journal_name

Clin Endocrinol (Oxf)

journal_title

Clinical endocrinology

authors

Bell GM,Sawers JS,Forfar JC,Doig A,Toft AD

doi

10.1111/j.1365-2265.1983.tb02881.x

subject

Has Abstract

pub_date

1983-05-01 00:00:00

pages

511-6

issue

5

eissn

0300-0664

issn

1365-2265

journal_volume

18

pub_type

杂志文章
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