In mild cases, myocarditis may have no noticeable symptoms. You may feel ill and have general symptoms of a viral infection and never realize your heart is affected.

In serious cases, the signs and symptoms of myocarditis vary, depending on the cause of the disease. Common myocarditis symptoms include:

  • Chest pain
  • A rapid or abnormal heartbeat (arrhythmia)
  • Shortness of breath, at rest or during physical activity
  • Fluid retention with swelling of your legs, ankles and feet
  • Fatigue
  • Other signs and symptoms you'd have with a viral infection, such as a headache, body aches, joint pain, fever, a sore throat or diarrhea

Myocarditis in children

When children develop myocarditis, they may have these signs and symptoms:

  • Fever
  • Fainting
  • Breathing difficulties
  • Rapid breathing
  • Bluish or grayish discoloration of the skin

When to see a doctor

Call your doctor if you have any of the symptoms of myocarditis, particularly chest pain and shortness of breath. If you've had an infection, be alert for the symptoms of myocarditis and let your doctor know if they occur. If you have severe symptoms, go to the emergency room or call for emergency medical personnel.

May. 02, 2012

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