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Heart Murmurs

Pediatrics Expert Advice from Shari Nethersole, M.D.

Q: A heart murmur was discovered when I took my 15-month-old daughter for a checkup. The doctor has scheduled an EKG and chest x-ray. He also wants further tests if these are negative. I don't see any reason to be worried. It's just a heart murmur isn't it?

A: Be assured that many kids have murmurs heard by the doctor, and all types are not necessarily a problem.

A murmur is basically a sound that one hears when listening to the heart with a stethoscope. That sound is from the blood flowing between chambers in the heart and blood vessels near the heart. In many healthy individuals a sound can be heard, but the blood is flowing across totally normal valves and chambers. In up to 30 percent of normal children, a sound like this can be detected during a routine examination.

Abnormalities of the heart will also cause a doctor to hear a murmur. If there is a hole between the two sides of the heart and the blood is flowing across a space it normally does not go, it will cause a murmur. If there are abnormalities of the valves connecting the chambers of the heart, it can also cause a murmur.

Distinguishing between an "innocent" murmur and a murmur that indicates a significant heart abnormality is usually not difficult. There are certain characteristics of murmurs that help to differentiate the two: location, loudness, and pitch of the murmur, as well as what the rest of the heart exam sounds like.

Sometimes it can be a problem sorting out if the murmur represents an underlying problem or not just by listening with a stethoscope. The chest x-ray and EKG can help determine this. If it is still not clear, then an echocardiogram (a special ultrasound or sound wave test of the heart) can help define the exact anatomy of the heart.

In summary, I appreciate your concern, but try not to be alarmed. Your child's doctor will be happy to answer any questions that you have about the murmur.

More on: Expert Advice

Shari Nethersole is a physician at Children's Hospital, Boston, and an instructor in Pediatrics at Harvard Medical School. She graduated from Yale University and Harvard Medical School, and did her internship and residency at Children's Hospital, Boston. As a pediatrician, she tries to work with parents to identify and address their concerns.


Please note: This "Expert Advice" area of FamilyEducation.com should be used for general information purposes only. Advice given here is not intended to provide a basis for action in particular circumstances without consideration by a competent professional. Before using this Expert Advice area, please review our General and Medical Disclaimers.

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