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  • Title: Epinephrine-induced myocardial infarction in severe anaphylaxis: is nonselective β-blockade a contributory factor?
    Author: Cunnington C, McDonald JE, Singh RK.
    Journal: Am J Emerg Med; 2013 Apr; 31(4):759.e1-2. PubMed ID: 23380109.
    Abstract:
    Epinephrine-induced myocardial ischemia in the setting of anaphylaxis is a rare event and is postulated to be due to coronary artery spasm. We report the case of a 43-year-old woman who presented to the emergency department with an anaphylactic reaction triggered by flucloxacillin. She was treated with intramuscular epinephrine, following which she developed ischemic chest pain and electrocardiographic changes, associated with troponin elevation. Subsequent coronary angiography demonstrated normal coronary arteries. In this case report, we discuss the potential role of prior nonselective β-blockade with propranolol in predisposing such patients to ischemic cardiac events following treatment with epinephrine.
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