Do you know if Valsalva is on your schedule too? If I remember correctly, that's done in the same room as the heart rate variability testing ... it was a pretty quick and easy test. Not sure if it's something that's warranted for any of us or only depending on whether we have certain symptoms or positives on certain other tests? It might be something to double-check if you don't see it on your schedule of tests (you can call the lab directly to see if you're schedule for it, or you can call Dr. Fouad's secretary).
I'm guessing they'll probably decide whether or not to do a QSART and/or other tests based on the results of the ones you mentioned above. I know that on the day I went, they tentatively scheduled me for a bit of everything, but only planned on actually following through with two of the tests if those two went a certain way. If they went another way, they would go ahead and follow through on the remainder of the tests rather than canceling them (which is what ended up happening). So, yeah, you may find that you end up doing more (or less) once they get results from the stuff you're scheduled for first. I think they're pretty flexible that way.
Like Christy said, I think the biggest thing is probably to bring notes with you on things you want to remember to ask/say and anything you think might help the doc (her suggestion of former med list is an excellent one). I also went on a mission before hand to get the most complete version of my medical records possible (not of my whole life, hehe, just of the stuff relevant to my dysauto) to take with me. More on that here:
http://www.medhelp.org/posts/Dysautonomia-Autonomic-Dysfunction/Medical-Records--Test-Results--and-Charts/show/1044052
Also, there are two search boxes on our MedHelp pages; the one at the very top of the page says in light gray inside "Search conditions, symptoms, and treatments" and there's a smaller one in the right sidebar within our community forum that says in light gray inside "Search this Community." If you type a search query into the smaller sidebar search, you can search solely within the Dysautonomia Forum, rather than MedHelp 'at large,' so-to-speak. If you search for "Cleveland Clinic" you can read through older threads where we've discussed it before.
A Quick Reminder On Browsing Old Threads Found Through Search:
Just please be aware of the dates on these threads and that outdated threads are essentially "dead;" they're fine for browsing and reading to learn more, but it isn't very helpful to try to post and discuss within these threads because some of the involved users may no longer be on the forum, some users may have resolved the issues being discussed by now, etc. "Dead threads" are no longer relevant and if you'd like to discuss something you find in one, it's preferable to copy and paste the URL (e.g.,
http://www.medhelp.org/posts/Dysautonomia-Autonomic-Dysfuction/Blah-Blah/show/1234567) of the thread for reference if need be, but to go ahead and start a new thread to continue the discussion yourself.