Functional Heart Murmur (Child)

A heart murmur is a sound that blood makes as it moves through the heart. It may be a sign of some problem in the heart or valve structure. But in most cases a heart murmur is completely harmless and a normal finding. Sometimes they can be a sign of a more serious issue that needs more testing or treatment. Most children have a heart murmur at some time in their life. It may be the result of a short-term (acute) illness such as an upper respiratory tract infection. These murmurs come and go during childhood. They don't affect the child’s health. As the child gets older, the murmurs go away on their own. These are called innocent or functional murmurs.

Home care

Innocent heart murmurs don't need special care or treatment.

Follow-up care

Follow up with your healthcare provider, or as advised. Getting regular checkups can allow your healthcare provider to monitor for anything unusual.

When to seek medical advice

Call your healthcare provider right away if any of these occur:

In newborns and babies:

  • Rapid breathing or blue lips

  • Trouble feeding

  • Doesn't gain weight normally

  • Blue legs or feet

In children and teens:

  • Tiredness or trouble exercising

  • Passing out

  • Trouble gaining weight

  • Chest pains

  • Swelling of the legs

  • Complains that his or her heart is beating fast

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