Q: My 7-year-old niece has been diagnosed with a heart murmur, and my brother says she won't be receiving any kind of treatment. What is a heart murmur? Will it interfere with the activities she loves ...

Heart murmurs are vibrations caused by abnormal blood flow, graded on a scale of one to six. Causes range from congenital defects and anemia to dental disease, inflammation, cardiomyopathy, and ...

Mitral valve prolapse is a condition affecting the heart. Doctors may also call it floppy mitral valve syndrome or systolic click-murmur syndrome. It stems from a mitral valve malfunction, which may ...