Unexpected case of Graves` disease induced myocarditis: a case report

Abstract

Myocarditis due to Graves` disease is rare and has a clinical presentation that mimics acute coronary syndrome. In this case report, a 50-year-old woman was admitted with a clinical presentation of very high-risk non-ST segment elevation myocardial infarction, new-onset atrial fibrillation, and acute heart failure. Normal coronary angiography and the presence of intra-myocardial late gadolinium enhancement based on cardiac MRI led to the diagnosis of myocarditis. The presence of thyroid nodules and elevated thyrotropin receptor antibodies indicated Graves` disease as the underlying cause of myocarditis. Management using Propylthiouracil and the guideline-directed medical therapy for heart failure successfully improved the patient’s condition. Early diagnosis, effective care, and adequate knowledge of the relationship between hyperthyroidism and myocarditis, improve outcomes in Graves’ disease-induced myocarditis.