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[Study of thyroid function in patients chronically treated with amiodarone]
1Divisione di Medicina generale II, Presidio ospedaliero, Garbagnate Milanese.
Recenti Progressi in Medicina
|March 1, 1992
Summary
Amiodarone treatment alters thyroid function tests, including reduced total and free T3 and increased TSH, total T4, free T4, and reverse T3 in euthyroid patients. Duration of therapy did not significantly impact these thyroid hormone changes.
Area of Science:
- Endocrinology
- Pharmacology
Context:
- Amiodarone is an antiarrhythmic drug known to affect thyroid function.
- Clinically euthyroid patients on amiodarone therapy require careful monitoring of thyroid hormone levels.
Purpose:
- To investigate the impact of amiodarone on various thyroid function parameters.
- To compare thyroid function in patients treated for different durations with amiodarone.
Summary:
- Thyroid function was assessed in 68 euthyroid patients treated with amiodarone, divided into short-term (<1 month) and long-term (>1 month) groups.
- Compared to healthy controls, both amiodarone groups showed decreased total T3 and free T3, and increased TSH, total T4, free T4, and reverse T3.
- No significant differences in thyroid function were observed between the short-term and long-term amiodarone treatment groups.
Impact:
- This study highlights consistent alterations in thyroid hormone profiles associated with amiodarone use, irrespective of treatment duration.
- Findings are crucial for clinicians managing patients on amiodarone, emphasizing the need for awareness of drug-induced thyroid dysfunction.
- Provides data for understanding amiodarone's pharmacodynamic effects on the hypothalamic-pituitary-thyroid axis.