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Course: A Woman With Recurrent Torsade de Pointes

CME Credits: 1.00

Released: 2023-01-18

A woman in her mid-40s presented to the emergency department after a fall with head trauma. A head computed tomography showed a 0.9-cm left subdural hematoma with a mild left to right midline shift. Her ethanol level was 202 mg/dL (to convert to millimoles per liter, multiply by 0.2171); magnesium, 1.7 mg/dL (to convert to millimoles per liter, multiply by 0.4114); potassium, 4.4 mEq/L (to convert to millimoles per liter, multiply by 1); and ionized calcium, 4.6 mg/dL (to convert to millimoles per liter, multiply by 0.25). The patient developed cardiac arrest due to ventricular arrhythmias in the emergency department and was successfully resuscitated. Echocardiography demonstrated a left ventricular ejection fraction of 50% and no regional wall motion abnormalities. She subsequently underwent embolization of the middle meningeal artery. After embolization, however, a worsening rightward midline shift was discovered. As a result, on the 11th day of her hospitalization, she had a burr hole evacuation. During day 15 of admission, the patient had 3 episodes of torsade de pointes (TdP) while receiving 50 mg of metoprolol succinate daily, and her 12-lead electrocardiogram (ECG) is shown in .


Educational Objective
Based on this clinical scenario and the accompanying image, understand how to arrive at a correct diagnosis.


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