what is a heart murmur caused by
A heart murmur may be heard by your vet when he or she listens to your cat's heart. A heart murmur is caused by turbulent blood flow within the heart or the large vessels exiting from the heart.This results in an abnormal noise which can be heard by your vet when listening with a stethoscope. heart murmur may be heard by your vet when he or she listens to your cat's heart. A heart murmur is caused by turbulent blood flow within the heart or the large vessels exiting from the heart.