Akron Children's Hospital
Akron Children's Hospital: Kidshealth: Heart Murmurs
Everyone's heart makes sounds, but some people have hearts that make more noise than others. Usually, however, these heart murmurs don't mean anything is wrong. Find out more about these in this article for kids.
Other
Cardiothoracic Surgery of Savannah: Heart Murmurs
Information about heart murmurs and other problems with the heart valves. Gives good illustrations and audio examples of different kinds of heart murmurs.
Texas Heart Institute
Texas Heart Institute: Heart Information Center: Heart Murmurs
One-page article answers questions about heart murmurs: causes, symptoms, diagnosis, and treatment.