What happens if a heart murmur doesn't heal? what are the next steps?

Too vague: A murmur is a sound your provider hears through a stethoscope, and may me associated with a normal heart. If the murmur is related to valve pathology, the severity of the condition will have to be evaluated and followed, usually with an echocardiogram. If the valve condition is severe and produces symptoms, or changes in the hearts function, repair or replacement of the valve may be needed.

Murmur: Heart murmur is noise caused by turbulent blood flow in and around the heart. In timing there are systolic, diastolic and continuous murmurs. By cause there are too many to enumerate here.