I have a heart condition called Dilated Cardio Myopathy
that I've had most of my life. When you find out you have a defective heart you try to find out as much about it as possible.
I've done a little research on heart murmurs
my self. What I've found is that a heart murmur is a small hole between the ventricles of the heart. That small hole will allow oxygen
rich blood to mix with oxygen deficient blood traveling to the lungs.
Instead of the heart having a nice thump thump rhythm it will have a squish squish sound when listening to it beat.
It's a fairly common condition. In some instances where the murmur occurs in a child, the hole could repair itself as she grows older.