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Related Experiment Videos

Euthyroid sick syndrome: an overview

B McIver1, C A Gorman

  • 1Division of Endocrinology and Metabolism, Mayo Clinic, Rochester, Minnesota 55905, USA.

Thyroid : Official Journal of the American Thyroid Association
|February 1, 1997
PubMed
Summary
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Thyroid hormone levels often change in nonthyroidal illnesses, impacting prognosis. The role of these changes and thyroid hormone therapy in the euthyroid sick syndrome remains controversial and requires further research.

Area of Science:

  • Endocrinology
  • Internal Medicine
  • Critical Care

Background:

  • Thyroid hormone abnormalities are common in nonthyroidal illnesses, affecting thyroid stimulating hormone (TSH), triiodothyronine (T3), and thyroxine (T4) levels.
  • These changes are linked to disease severity and predict poor prognosis in various conditions.
  • The underlying mechanisms involve cytokines, inflammatory mediators, and alterations in hormone metabolism and binding.

Purpose of the Study:

  • To explore the unresolved question of whether thyroid hormone alterations in euthyroid sick syndrome are adaptive or maladaptive.
  • To discuss the controversy surrounding thyroid hormone therapy in these patients.
  • To highlight the need for future research directions.

Main Methods:

  • Review of existing literature on thyroid hormone function in nonthyroidal illnesses.

Related Experiment Videos

  • Analysis of the potential impact of cytokines and inflammatory mediators.
  • Examination of the limited controlled trials on thyroid hormone therapy.

    • Main Results:

    • Thyroid hormone changes correlate with disease severity and prognosis.
    • The adaptive versus maladaptive nature of these changes is not yet understood.
    • Existing trials on thyroid hormone therapy show conflicting cardiovascular effects and lack power to assess mortality.

    Conclusions:

    • The use of thyroid hormone therapy in euthyroid sick syndrome is controversial due to conflicting evidence.
    • Future trials should focus on severely ill patients with high mortality.
    • Further understanding of the impact of altered thyroid hormone status on tissue function is crucial.