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Review Question - QID 216582

Anaphylaxis Prognosis, Prevention, and Complications Complications QID: 216582 (M2.OMB.4875)
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QID 216582 (Type "216582" in App Search)
A 48-year-old man presents to the emergency department in acute respiratory distress. He was eating at a new Japanese restaurant when he felt his lips and throat close. He is now unable to speak and is cyanotic. Physical exam reveals the finding in Figure A. The patient is promptly given intramuscular epinephrine with resolution of his symptoms. However, he subsequently complains of severe chest pain. An ECG is performed as seen in Figure B. Which of the following is the most direct pathophysiological mechanism for this patient's ECG changes?
  • A
  • B
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  • A
  • B