Arterial fix is usually not so serious if the surgeon has lots of practice and is just good with his/her hands. Neurological can be fixed with really good PT who knows TOS well. I couldn't do stretches or nerve glides, but now I can because first my PT did rib work on me, that is fixing the foundation and doing myofascial release before making me do any exercises.
Now I can do most of the exercises and stretches and nerve glides that I couldn't do before with other PT's. My PT is Dr. Art Ando at Ando and Aston, Anaheim hills CA.