Hi, my name is Kim, I just want to thank you all for sharing all of this information. I have been really sick for a few months now and been to many doctors, none of which have really helped much. I was hospitalized for dehydration and ever since then have felt horrible. A few years ago I had some of these problems like palpitations and lightheadedness, but now it's way worse and there are many other problems. I have many of the same syptoms all of you have talked about. First they thought I had an adrenal tumor, then hyperthyroidism, then diagnosed my with anxiety and sinus taychardia. I take beta blockers and xanax. The beta blockers seemed to work good, but don't seem to anymore. My pulse definately raises 30bmp from when laying to standing. So I have been desperately searching the internet looking for answers and now thanks to you all, I think I have found what's wrong. So I'm guessing there is not a lot they can do for POTS? Do they know the cause? Thanks again, KIM
