Takotsubo cardiomyopathy in amiodarone-induced hyperthyroidism

Area of Science:

• Cardiology
• Endocrinology
• Pharmacology

Background:

• Takotsubo cardiomyopathy (TC), or 'broken heart syndrome,' is a reversible heart condition mimicking myocardial infarction.
• While emotional trauma is a classic trigger, other factors like thyroid dysfunction and iatrogenic causes are increasingly recognized.
• Thyroid disease is a common comorbidity in TC patients, with both hyperthyroidism and hypothyroidism linked to its development.

Purpose of the Study:

• To report a unique case of TC precipitated by amiodarone-induced hyperthyroidism.
• To highlight the potential iatrogenic and endocrine triggers of TC beyond emotional stress.
• To emphasize the clinical significance of monitoring thyroid function in patients treated with amiodarone.

Main Methods:

• Case report of a postmenopausal female diagnosed with TC.
• Investigation revealed amiodarone-induced hyperthyroidism as the precipitating factor.
• Clinical, analytical, and electrocardiographic data were used for diagnosis.

Main Results:

• The patient presented with symptoms consistent with TC.
• Amiodarone-induced hyperthyroidism (Type II) was identified as the cause.
• This represents a rare instance of TC triggered by this specific iatrogenic endocrine condition.

Conclusions:

• Amiodarone-induced hyperthyroidism can precipitate Takotsubo cardiomyopathy.
• Clinicians should consider iatrogenic causes, particularly thyroid dysfunction from amiodarone, in TC diagnosis.
• Given amiodarone's widespread use for atrial fibrillation, awareness of this risk is crucial.