Heart and Blood Conditions

Myocarditis Symptoms and Diagnosis

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 a chest X-ray, echocardiography, electrocardiogram, magnetic resonance imaging (MRI), and cardiac catheterization. They will also need polymerase chain reaction (PCR) testing, a blood test to check for infections.

Contact Us

Contact the Heart Center at 206-987-2015 for a cardiac referral, a second opinion or more information.