Is a heart murmur dangerous?

A heart murmur—an abnormal sound that is heard through the stethoscope—may exist without any associated medical conditions. These types of heart murmurs are known as functional murmurs and are common in highly trained athletes.

An abnormal heart murmur is caused by a heart valve defect that is present at birth or from heart valve disease that can arise from an infection, disease, or aging. (This answer provided for NATA by the University of Montana Athletic Training Education Program.)

Continue Learning about Heart Murmur

What causes a heart murmur?
Mark L. Cohen, MDMark L. Cohen, MD
A heart murmur is a sound made from blood moving through the heart or one of the large blood vessels...
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How is a heart murmur diagnosed?
Piedmont Heart InstitutePiedmont Heart Institute
Doctors use a stethoscope to listen to heart sounds and hear heart murmurs. They often notice innoce...
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Can a child outgrow a normal heart murmur?
Yes. If a child has a normal, or “innocent,” heart murmur, the heart is normal. After a few years, t...
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How is a heart murmur treated?
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Two types of heart murmurs are treated by following ways: Innocent Heart Murmurs Healthy children ...
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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.