Bruit presents in rt carotid artery when lying back (45d), but not while sitting up and calm - is it pos. not damaged?(duplex ultra scheduled)

Maybe: A bruit over the carotid could indicate a stenosis or narrowing, but could be just a sign of turbulence. Agree with duplex. You need to check for atherosclerotic narrowing, and even a vascular dissection, but also, check for a bruit transmitted from heart or aorta.

Carotid bruit: A trivial amount of carotid blockage, say 5-10% blockage, can be enough to cause a bruit. In the same way, sometimes the bruit disappears as the blockage gets very bad. The message is: a bruit does not tell you there is a problem, only that you need a carotid duplex scan (a kind of an ultrasound) to investigate the vessel with the bruit to find out where you stand.

Carotid bruits: we are often taught to listen for a carotid bruit in medical school. But there are much better tests. Listening with the stethoscope has limited value in modern clinical practice. The carotid bruit is not always an important finding. It may be present with an entirely normal artery structure. The ultrasound is a much better evaluation of the carotid artery. Expect yours to be fine!