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Subclinical Hyperthyroidism and the Cardiovascular Disease.

Alessandro P Delitala1

  • 1Azienda Ospedaliero-Universitaria di Sassari, Sassari, Italy.

Hormone and Metabolic Research = Hormon- Und Stoffwechselforschung = Hormones Et Metabolisme
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Subclinical hyperthyroidism, a common thyroid disorder, is linked to cardiovascular issues like atrial fibrillation, especially in older adults. Treatment decisions for this often asymptomatic condition require careful clinical judgment.

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Area of Science:

  • Endocrinology
  • Cardiology
  • Geriatrics

Background:

  • Thyroid hormone excess impacts metabolism and the cardiovascular system.
  • Subclinical hyperthyroidism (low TSH, normal thyroid hormones) is prevalent, increasing with age and in nodular goiter.
  • Often asymptomatic, it's diagnosed incidentally during screenings.

Purpose of the Study:

  • To highlight the growing attention on subclinical hyperthyroidism.
  • To discuss its association with cardiovascular disease, particularly atrial fibrillation.
  • To address the uncertainty regarding its effects on blood pressure, stroke, and heart failure.

Main Methods:

  • Review of existing literature and clinical guidelines.
  • Analysis of epidemiological data on prevalence in aging populations.
  • Clinical assessment of diagnostic criteria and treatment indications.

Main Results:

  • Subclinical hyperthyroidism is common, affecting up to 15.4% of individuals over 75.
  • A significant association exists between subclinical hyperthyroidism and atrial fibrillation.
  • Impacts on blood pressure, stroke, and heart failure remain less defined.

Conclusions:

  • Subclinical hyperthyroidism requires careful consideration due to cardiovascular risks.
  • Treatment decisions should be individualized, especially for elderly patients with comorbidities.
  • Further research is needed to clarify broader cardiovascular implications.