Should I be worried about a heart murmur my doctor heard at 2-week check-up?

Q: My doctor heard a heart murmur at my baby's two-week exam. He said not to be worried--what do you think?

A: A heart murmur is a quiet extra sound that usually comes from turbulent blood flow through a tiny hole between the heart chambers or from the sound blood makes as it flows through the valves.

More than 50 percent of children have audible heart murmurs at some point in childhood; almost all of these conditions are innocent. An experienced pediatrician usually can determine that this type of murmur will cause no harm and that the child does not need to see a cardiologist.

As long as your baby has no other symptoms, breathes normally, is growing well and has good skin color, your doctor likely will choose to simply monitor the situation.