What is a functional murmur? It is dangerous?

Question: What is a functional murmur? It is dangerous? Archimedes (Venezuela).

Answer: Usually the passage of blood through the different parts of the normal heart does not produce noise. But in certain people (10-15%), especially in young people, the friction of the blood by the normal heart valves can be audible with the stethoscope during the auscultation performed by the doctor. This noise that is heard, in effect, sounds like a "breath".

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