@andytheman

Yes, I completely agree with this. When something seems not right witht the doctor providing you care, get a second opinion. If possible seek care at a tertiary, academic center that has more unusual and complex cases referred to them. When this happens, the doctor gains more special real life experience than other places which would see less unusual cases and not have the exerience to handle them. I would add that ultrasound is good for screening and follow up, but a high quality CT angiogram will usually provide the best evaluation of blood vessels and establish a strong baseline for treatment or followup.