Description
A 36-year-old Caucasian woman with a medical history of Graves disease presented to the emergency department with typical chest pain, and she was found to have a ST-elevation myocardial infarction (STEMI) via ECG and elevated troponins. Emergent cardiac catheterisation revealed distal blockages in the left anterior descending artery and second obtuse marginal artery (figure 1A,B). After distal balloon angioplasty, the decision was made to further treat the patient medically and discharge home after clinical stability was achieved. She was readmitted 2 days later for new onset of palpitations with up-trending troponins. Laboratory tests were significant for a low thyroid-stimulating hormone of <0.01 µLU/mL (reference range: 0.27–4.2 µLU/mL), and elevated free T4 of 4.02 µLU/mL (reference range: 0.9–1.7 ng/dL), free T3 of 4.8 pg/mL (reference range: 2.5–4.3 pg/mL) and a thyroid stimulating immunoglobulin of 386 (reference range: <140% baseline). She was immediately started on both methimazole 20 mg and potassium iodine oral solution (SSKI). Further workup...
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