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Similar Publications

Incidence and Risk Factors for Amiodarone-Induced Thyroid Dysfunction: A Nationwide Retrospective Cohort Study.

Am J Cardiovasc Drugs

January 2025

Division of Cardiology, Department of Internal Medicine, Ilsan Paik Hospital, Inje University College of Medicine, Goyang, Republic of Korea.

Background: Amiodarone is an effective anti-arrhythmic drug; however, it is frequently associated with thyroid dysfunction. The aim of this study was to investigate the incidence and risk factor of amiodarone-induced dysfunction in an iodine-sufficient area.

Methods: This retrospective cohort study included 27,023 consecutive patients treated with amiodarone for arrhythmia, using the Korean National Health Insurance database.

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Article Synopsis
  • A case study discusses primary hypogonadism caused by prolonged use of amiodarone, a medication known for multiple side effects.
  • The patient, a 57-year-old man, experienced testicular pain, gynaecomastia, and decreased libido, ultimately diagnosed with hypergonadotropic hypogonadism and confirmed testicular atrophy.
  • The findings emphasize the need for careful monitoring of patients on amiodarone to detect signs of testicular dysfunction early, ensuring appropriate treatment for hypogonadism.
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Article Synopsis
  • Amiodarone is a highly effective antiarrhythmic drug used to treat conditions like atrial fibrillation and ventricular arrhythmias, functioning across all four classes of antiarrhythmics.
  • It has a long half-life and complex pharmacokinetics, which can lead to prolonged effects even after stopping the medication, making regular monitoring for side effects like thyroid issues and lung damage essential.
  • This paper aims to offer a detailed review of amiodarone's uses, dosing guidelines, interactions with other medications, and necessary monitoring practices.
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Article Synopsis
  • The study investigates the effectiveness of technetium-99m (99mTc)-labelled Methoxy-2-Isobutylisonitrile (MIBI) in diagnosing amiodarone-induced thyrotoxicosis (AIT) through various medical tests, including thyroid scintigraphy and ultrasonography.
  • It included 36 AIT patients who underwent multiple analyses, and results showed that semi-quantitative MIBI analysis was more effective in differentiating between AIT subtypes compared to visual analysis.
  • The findings suggest that while visual analysis is helpful, semi-quantitative methods provide improved accuracy, indicating the need for larger studies to standardize diagnostic approaches.
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Amiodarone is an antiarrhythmic drug which may be associated with thyroid dysfunction. Type I amiodarone-induced thyrotoxicosis (AIT) is treated with thionamides and type II AIT is treated with glucocorticoids. Combined therapy is used in mixed or indeterminate forms.

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