Hey there everyone, I was wondering what the following (below) should be called. I think its not POTS, does not look like orthostatic hypotension, but what is it? I sort of have POTS/orthostatic intollerance as a diagnosis right now, but its not a set one yet as the doctor does not know for sure. I am trying to discover more about what exactly happens when I stand and found out the following. Below there is a series of blood pressure measurements that I did, while doing a poor mans tilt table test at home. I use a blood pressure meter with an arm cuff (Omron m6 comfort). And I measure while standing upright, with my arm just hanging down. I have done this test over and over again through time, and 'every time' my pulse pressure narrows to 11/12, which is when I start to faint. 12:22 - 99/63 73 (pulse pressure 36) 12:23 - 97/61 71 (pulse pressure 36) 12:26 - 97/78 99 (pulse pressure 19) 12:28 - 98/82 102 (pulse pressure 16) 12:30 - 99/80 94 (pulse pressure 19) 12:31 - 105/92 103 (pulse pressure 13) 12:33 - 91/80 106 (pulse pressure 11) When I stop (which I have to), often there will be a really sudden drop, which makes me faint if I am not careful. This one went to 71/34 suddenly. I was pretty much gone but did manage to lay down instead of falling. When I am down on the floor, it all rises towards 120/65 HR45 (pulse pressure 55) So blood pressure recovers right away, but my brain remains dead (or well.. not quite but the rest of the day will be a blurry event). So, my blood pressure, does not drop that much, my heart rate does not rise 'that much', but the pulse pressure narrows, and it stays that way, until I fall down. I think 'that' is my problem. That is not POTS right? Or is it? And if its not, what is it called? Moving about influences the speed of the drop, when I keep moving my legs, my pulse pressure will not drop nearly as fast, but my brain becomes blurry anyway. And, I have measured saturation a couple of times too. It tends to be really high (99) at first, and when I am doing the standing there will be spikes down between 90 an 80. Thanks in advance for any input/ideas.