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Review Question - QID 212317

Torsades de Pointes Introduction Associated conditions QID: 212317 (M1.OMB.18.4756)
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QID 212317 (Type "212317" in App Search)
A 24-year-old man presents to the emergency department with shortness of breath and anxiety. He states that his symptoms started this morning and have not improved since then. The patient has a past medical history of intravenous drug abuse and recently started methadone but is otherwise healthy. Last night he was binge drinking and vomited twice. His temperature is 99.5°F (37.5°C), blood pressure is 97/58 mmHg, pulse is 120/min, respirations are 17/min, and oxygen saturation is 98% on room air. The patient's previous (top) and current (bottom) electrocardiogram (ECG) are seen in Figure A. Physical exam is notable for a rapid heart rate with cranial nerves II-XII grossly intact. Which of the following is the most likely predisposing etiology for this patient's current presentation?
  • A
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  • A