My vascular TOS compressed my subclavian vain shut, which is pretty typical of venous TOS, as I understand it. I do believe that a repetitive motion in my shoulder AND being overly muscular in the chest area (due to the sports that I do) contributed to or probably even caused my venous TOS.

I have thought about this subject long and hard, so it is interesting that you bring it up, Richard. Sadly, I have not found any really good long term studies of the different circumstances of TOS patients; how it was diagnosed and what symptoms patients were having, why or how they got it, what was done about it (surgery, PT, etc.) and long term what the results were for patients - successes and failures. It indeed would be great to see a group of doctors get together and compile their information and conduct long term studies on all types of TOS patients.