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If you have a harmless heart murmur, more commonly known as an innocent heart murmur, you likely won't have any other signs or symptoms. An abnormal heart murmur may cause no obvious other signs or symptoms, aside from the unusual sound your doctor hears when listening to your heart with a stethoscope. But if you have these signs or symptoms, they may indicate a heart problem: Skin that appears blue, especially on your fingertips and lips.
A range of causes. A heart murmur is usually innocent, and generally does not mean there is an abnormality. The murmur may be heard only because the vibration in the blood travelling through the heart is greater than usual, or the heart is closer to the front of the chest and the stethoscope.