myocarditis

/ˌmaɪoʊkɑrˈdaɪtɪs/
noun
  1. Inflammation of the heart muscle, often caused by a viral infection, which can cause chest pain, shortness of breath, and irregular heartbeat.
    • The athlete was sidelined after being diagnosed with myocarditis.
    • Symptoms of myocarditis can include fatigue and swelling in the legs.
    • Myocarditis is sometimes a complication of the flu.