What does it mean the right suvclarican artery velocities hemodyamically significant stenosis?

The wording indicates they found an increased flow rate at that point indicating a narrowing of the artery. It is like the rapids of a river when the flow comes through a narrow or rocky point.

blood is flowing very fast thru a settlement of the subclavian artery Most likely due to rusty arteries from atherosclerosis. This is not a normal part or being human and occurs when you feed/exercise your roots wrong or you might have fibromuscualr hyperplasia or this and other arteries If it is severe enough you many have a falsely low BP on the right. If atherosclerosis move 2 Ornish diet