Your symptoms sound so familiar and I had trouble as well getting doctor to believe the symptoms were all related. The dizziness was really bad before my surgery and I always felt like I was going to pass out. Since the surgery, I still have dizziness, but I no longer feel like passing out. During compression of subclavian artery, my vertebral artery would stop flowing completely. I am still having issues with both side, and don't know which side is worse. I did not have cervical ribs, but did have 1st rib removed on left. I wish you the best of luck.