Has a doctor ever paused during a routine check, listened a little longer with the stethoscope, and mentioned that you have a heart murmur? Or perhaps a paediatrician said the same about your child years ago, and the phrase has been sitting quietly in the back of your mind ever since. It is easy to hear the word "murmur" and imagine something serious. In many cases, the reality is far more reassuring, though not always. So what does a heart murmur actually mean, and when does