What Causes a Heart Murmur?

What causes a heart murmur is when too much blood is flowing through the heart at once, or when blood is flowing more quickly than normal through the heart. Sometimes a heart murmur may be nothing to worry about. Other times, however, a heart murmur may be an indication of a medical problem, such as hyperthyroidism.

You can find more information here: nhlbi.nih.gov/health/dci/Diseases/heartm....

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