Hi! I'm definitely not giving medical advice but I had a blood clot in my subclavian vein and some of the other veins in the arm. It was big. They mechanically removed the clot and put a stent in (bad idea). The vein was damaged from being compressed by a old broken collar bone issue. Bottom line is I have very low blood flow in that vein now. The flow does make other paths. I have more distended veins on my left chest. I really don't have big issues because of the vein and blood flow. What ended up happening to me was I developed nerve compression after I had the collar bone issue fixed. The nerve compression really sucks and I may have surgery to deal with that. Just my opinion - I would talk to a couple vascular doctors at large teaching hospitals to get other opinions. Ask all your questions and make the best decision. Not sure if this helps at all but you aren't alone with getting a DVT in the upper extremity from compression