Acute ST-elevation myocardial infarction is a life-threatening medical emergency that needs to be recognized early and treated properly to prevent deleterious complications, including death. A thyroid storm (TS) is a rare but severe manifestation of uncontrolled hyperthyroidism that might present with serious cardiovascular or neurological problems. We described a case of a 40-year-old male patient, known to have uncontrolled hyperthyroidism, who presented with acute onset of central chest pain, agitation, tachycardia, and pulmonary congestion. Fast atrial fibrillation with ST-segment elevation in anterior leads was detected on electrocardiogram. Thyroxin level (T4) was very high with undetectable thyroid stimulating hormone. Initially, the patient refused any type of coronary revascularization; therefore, he was admitted to the cardiology intensive care unit, and medical treatment was commenced for both TS and acute coronary syndrome. High-risk coronary angiography was done 2 h later because he had worsening persistent chest pain and started to develop signs of heart failure. It showed embolic occlusion of the distal left anterior descending artery that was treated medically with anti-coagulation. There were no complications. Chest pain and thyroid function tests settled down during his hospital stay with close cardiology and endocrinology follow-up.
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