Hmmm. I was given a tilt table test in 2009 by a neurologist who was intent on diagnosing the cause of my “brown outs”—near fainting spells, which had been happening for years.
I “passed” the test by passing out fully, with low heart and blood pressure rates. The diagnosis was veso vegal syncope. Another name for it I learned after also developing axonal PN was “autonomic neuropathy.” I was given midodrine in 2009 for the syncope, which worked until my heart slowed down to bradycardia four years later.
I have had no further medication for that specific diagnosis since.
However, there is a test for autonomic neuropathy, or syncope, but as the nurses told me, it is usually the last test on the list for figuring out its ephemeral symptoms.
Mention it to your neurologist. Hope this helps: