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Etiology

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Infectious myocarditis

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  • Viral, e.g., coxsackie (most common), HIV

  • Rickettsial, e.g., scrub typhus, Rocky Mountain spotted fever, Q fever

  • Diphtheria

  • Chagas' disease

  • Toxoplasmosis

  • Trichinosis (Trichinella infection)

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Drug-induced & toxic myocarditis

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  • Doxorubicin

  • Emetine

  • Catecholamines (e.g., pheochromocytoma)

  • Phenothiazines

  • Lithium

  • Chloroquine

  • Disopyramide

  • Antimony-containing compounds

  • Arsenicals

  • Hypersensitivity to sulfonamides, penicillins, aminosalicylic acid

  • Radiation

  • Cocaine

DDx

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  • Angina or myocardial infarction

  • Pneumonia

  • CHF

See related DDx

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