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Amiodarone-induced thyrotoxicosis: a case for surgical management
Christine B Franzese1, Brendan C Stack
1Division of Otolaryngology, Penn State Hershey Medical Center, PO Box 850, MCH091, Hershey, PA 17033, USA.
American Journal of Otolaryngology
|November 14, 2002
Summary
Amiodarone-induced thyrotoxicosis (AIT) can be life-threatening and difficult to manage medically. Surgical intervention, such as total thyroidectomy, offers a viable solution for severe AIT cases, especially when amiodarone continuation is necessary.
Area of Science:
- Cardiology
- Endocrinology
- Pharmacology
Background:
- Amiodarone is frequently used for managing cardiac arrhythmias.
- Amiodarone can induce thyroid dysfunction, known as amiodarone-induced thyrotoxicosis (AIT), which can be severe.
- Discontinuing amiodarone is often not feasible due to its pharmacokinetic properties and the need for arrhythmia control.
Observation:
- A 55-year-old male with dilated cardiomyopathy and no prior thyroid disease developed AIT while on amiodarone.
- The patient experienced atrial fibrillation resistant to cardioversion and severe ventricular tachyarrhythmias upon attempting to withdraw amiodarone.
- Medical management of AIT proved ineffective, with the patient's condition deteriorating.
Findings:
- Surgical treatment via total thyroidectomy was performed due to the failure of medical management and the necessity of continuing amiodarone.
- The patient experienced no complications from the thyroidectomy.
- Post-surgery, the patient's condition improved, and successful cardioversion was achieved.
Implications:
- Life-threatening AIT is an uncommon but serious complication of amiodarone therapy.
- Medical management of AIT is challenging due to limited effective treatments.
- Total thyroidectomy should be considered for severe AIT cases, particularly in patients requiring continued amiodarone therapy.