Excellent information Meredith, and some which has not been shared here before. The issue of the internal jugular picking up the slack is an interesting one, but I believe that there is a significant time lapse involved before the body completes any compensation of consequence. Side effects from vacular surgery can be significant. I have talked with several who have had dizzyness, fainting, nausea and dizzyness onsets from rapid head movements or just rising from a supine position.