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[Ultra-sensitive TSH levels: an aid in the screening for amiodarone-induced thyroid dysfunction]
Archives Des Maladies Du Coeur Et Des Vaisseaux
|August 1, 1986
Summary
Diagnosing thyroid dysfunction in patients taking amiodarone is challenging. An ultrasensitive TSH test (TSH-U) shows promise for early detection of hypothyroidism and hyperthyroidism.
Area of Science:
- Endocrinology
- Pharmacology
Context:
- Amiodarone therapy can significantly alter thyroid hormone levels.
- Hypothyroidism in these patients poses serious cardiac risks.
- Diagnosing thyroid dysfunction is complicated by amiodarone-induced hyperthyroxinemia and hypotriiodothyronemia.
Purpose:
- To evaluate the diagnostic performance of an ultrasensitive TSH (TSH-U) assay compared to standard thyroid function tests and TRH stimulation tests.
- To assess the utility of TSH-U in detecting thyroid dysfunction in patients treated with amiodarone.
Summary:
- The study compared TSH-U with standard tests in 50 amiodarone-treated patients.
- TSH-U identified hypothyroidism in 4 patients and showed correlation with TRH stimulation tests.
- While TSH-U had limitations in detecting hyperthyroxinemia, it proved effective for hypothyroidism screening.
Impact:
- TSH-U can serve as a reliable, cost-effective initial screening tool for thyroid dysfunction in amiodarone users.
- This simplifies monitoring and reduces the need for comprehensive thyroid hormone panels and TRH testing.
- Early diagnosis of thyroid dysfunction is crucial for managing cardiac risks in amiodarone patients.