title: A Case of Amiodarone-Induced Thyrotoxicosis: A diagnostic and therapeutic dilemma.
abstract: Amiodarone is an iodine rich agent widely used for the treatment of ventricular arrhythmias, paroxysmal supraventricular tachycardia, atrial fibrillation and flutter. However 14-18% of patients treated with amiodarone develop overt thyroid dysfunction in the form of either amiodarone-induced thyrotoxicosis (AIT) or amiodaroneinduced hypothyroidism (AIH). Two different types of AIT have been recognised and designated as Type 1 and Type 2. Distinguishing between the two is often difficult, but necessary for instituting appropriate treatment. We report a case of a 56 year-old male patient who was started on amiodarone for atrial fibrillation and then developed AIT. The challenges in the diagnosis and management of these patients are discussed.
authors.affiliation: Armidale Rural Referral Hospital, Armidale, NSW 2350, Australia.
authors.forename: Ps
authors.initials: P
authors.lastname: Sudheer Ahamed
authors.forename: Abe
authors.initials: A
authors.lastname: Mathew