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Endothelial dysfunction in subjects with subclinical hyperthyroidism.

E Coban1, M Aydemir, G Yazicioglu

  • 1Department of Internal Medicine, Akdeniz University Faculty of Medicine, 07070 Antalya, Turkey. ecoban@akdeniz.edu.tr

Journal of Endocrinological Investigation
|May 10, 2006
PubMed
Summary

Subclinical hyperthyroidism is linked to higher von Willebrand factor (vWf) levels, indicating potential endothelial dysfunction. This dysfunction may increase cardiovascular risk in these individuals.

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Area of Science:

  • Endocrinology
  • Vascular Biology
  • Cardiovascular Medicine

Background:

  • High von Willebrand factor (vWf) levels are associated with endothelial damage or dysfunction.
  • Subclinical hyperthyroidism represents an early stage of thyroid overactivity with potential subclinical complications.

Purpose of the Study:

  • To investigate von Willebrand factor (vWf) levels in individuals with subclinical hyperthyroidism compared to euthyroid controls.
  • To explore the potential link between subclinical hyperthyroidism and endothelial dysfunction.

Main Methods:

  • A comparative study involving 20 subclinical hyperthyroidic subjects and 20 age-, gender-, and BMI-matched euthyroidic controls.
  • Measurement and statistical comparison of vWf levels between the two groups.

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Main Results:

  • Significantly higher vWf levels were observed in the subclinical hyperthyroidic group (42.9+/-9.6%) compared to the euthyroidic group (37.6+/-6.4%, p=0.026).

Conclusions:

  • Subclinical hyperthyroidism is associated with elevated vWf levels, suggesting a tendency towards endothelial dysfunction.
  • Endothelial dysfunction in subclinical hyperthyroidism may contribute to an increased cardiovascular risk profile.