There is some valuable notations here on the forum regarding testing...
We have all had some mof the tests and some of us cannot even get ok's to get them done.

After 7 years I'm still asking you~all questions on testing.
My thread on Vascular and arterial testing.
I take that information and suggest it to the treating MD's even though I'm post surgery 2002.

Finding a FAB TOS doc is essential.
I just founf mine after all these years.
The BEST thing I agree with Grom is the PT.
The Edgelow program has sure helped me.
You can order it without seeing Peter but its up to YOU as a patient to do it daily, 4-6 times a day whatever it takes.
It's not a cure but relief and strengthening when our bodies come crashing down.

Tamara has pointed out in her post thread on all the tests to have done to rule out and rule in TOS.

Informative, supportive, intelligent peeps here that have been through it all.
I don't know what I'd do if I had not found this forum.

And I have to think about all the thousands who have TOS and don't know about it.