HOW SERIOUS AND HOW TREATED.
Yes, a heart murmur is very serious. My own daughter was born with a murmur on her heart and had to undergo open-heart surgery at 4 months to close a hole in her left ventricle to restore her to health. Get help NOW. If you want information on anything related to this condition, send me fun mail Regards
my son's doctor's nurse said my son has it but my son's doctor never did anything about it.
I would say a heart murmer is pretty serious and you should talk to your doctor about it.