Also, a TTT done correctly can give good info. But the interpretation is as important as the test. A lot of cardios don't know how to set up the TTT and interpret it to give autonomic nervous system information. So, if you do find a provider, you might want to ask some questions.
And BTW, it is not a fun test! Takes some recovery time for many of us.
Best wishes,
Sushi
Very very good advice Sushi. I agree- the protocol used for the test & interpretation is VERY important.
For example, I had a cannula inserted less than 5mins before my TTT which is not good for interpreting autonomic function (if you get a vasovagal response- fainting- from needles OR an excess spike in adrenaline) it will skew the results.
I also was only tilted to 60 degrees. I have read that 70-80 is recommended for POTS assessment. I was only left there for 21mins before administration of nitroglycerin (drug challenge to bring on symptoms). I have read that 30-45mins is needed to rule out Neurally Mediated Hypotension (NMH).
I did have an inital HR increase of 33 bpm on my tilt table test (they did not have continous HR & BP monitoring- which is recommended for autonomic dysfunction testing) and a systolic BP increase of 30mmHg (which is indicative of hyperadrenergic POTS- normal people have no change or slight decrease in systolic BP and a slight increase in diastolic BP). OH and the nitro gave me a 55bpm heart rate increase (even before my BP dropped- an excessive response I think!)
BUT- went back to the public hospital cardio who said my test results were 'absolutely normal!' !!!!!???!?!???
Check out the dinet website, lots of great info and links to articles too.
Good luck