Hi, I had a tilt table test that I do not think was done very well either. I was up for 45 minutes, they never gave me an injection and although I was strapped in, I was never told not to move. I was light headed and uncomfortable and my heart rate jumped up 50 beats, but they said the test was negative. They remarked that it was "funny" my heart rate went up so much, but that it must be because I was dehydrated - they said not to eat or drink anything before the test. It was only three years later, recently, that a new doctor looked back at the test and said the results showed I have POTS. I don't know about your doctor, but do make sure he or she knows about POTS - everything would have been so much easier for me if they had realized what my increased heart rate meant at the time, rather than just thinking it was "funny." Kristen