How bad can a heart murmur get?

Depends: A heart murmur is indicative of damaged heart valves. It is graded between 1 to 5 depending on how loudly it is heard. This is usually reflective of how badly damaged the valves are.

Murmur: A heart murmur. A murmur is just noise. Sometimes serious problems cause a murmur many times a murmur is caused by normal flow. Patients often mistranslate what the dr. Tells them. Ask your doc about your situation.