A 60-year-old woman presents with symptoms of weight loss, anxiety, and palpitations. On examination, she has a thyroid goiter. Which of the following is the most likely cardiac finding?
High-Yield Explanation
Thyroid disease may affect the heart muscle directly or there may be excessive sympathetic stimulation. Common symptoms of thyrotoxic heart disease include palpitations, exertional dyspnea, and worsening angina. Atrial fibrillation is particularly common in older individuals.