What Ed said. A bruit is a symptom, not a disease, so by itself it does not affect either health or personality. You can google the word 'bruit' and learn more.
Bruit is french for noise, and that's exactly what it is When a Doctor listens through a stethascope, he/she may hear an abnormal sound of blood rushing through a vessel, a sound which doesn't sound like it should. If could be a narrowing of some kind or aneurysm. An ultrasound may or may not be able to detect the cause.