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Symptoms of Myocarditis

A baby with myocarditis may have these symptoms:

  • Fever
  • Fast heartbeat or arrhythmia
  • Fast breathing
  • Trouble feeding or working hard to breathe when feeding
  • Failure to thrive 
  • Being restless or irritable
  • Sweating more than normal
  • Having little energy or not taking interest in anything
  • Not putting out as much urine as normal
  • Having pale or bluish hands and feet (cyanosis)
  • Vomiting

Older children may also have a cough, nausea, abdominal or chest pain, and swelling in their legs, feet and face. They may be more tired than normal.

Myocarditis Diagnosis

To diagnose this condition, your doctor will examine your child, use a stethoscope to listen to their heart, and look for signs of infection or heart failure.

The doctor will ask for details about any symptoms your child has, their health history and your family health history.

Your child will need tests that provide more information about how their heart looks and works. These may include chest X-rays, echocardiographyelectrocardiogram and cardiac catheterization. They will also need blood tests to check for infection or related problems.

Who Treats This at Seattle Children's?

Should your child see a doctor?

Find out by selecting your child’s symptom or health condition in the list below:

Summer 2014: Good Growing Newsletter

In This Issue

  • Understanding the Power and Influence of Role Models
  • Legal Marijuana Means Greater Poisoning Risks for Children
  • Why Choose Pediatric Emergency Care?

Download Summer 2014 (PDF)