Alison Posted March 19, 2014 Report Share Posted March 19, 2014 I had autonomic testing this week. I've never fainted before, but after being upright for so long I started to pass out. They took blood straight after. I think I read that this blood test is to look at your epinephrine and norepinephrine. Just before I started to faint I could feel that my body had mobilised a huge amount of adrenaline. My question is - does this happen to everyone just before they faint - if so what is the point in doing the blood test - what is it really showing? I'm trying to get an understanding of it so I know what to ask the doctor when I go for my follow up. Thanks. Quote Link to comment Share on other sites More sharing options...
Chaos Posted March 20, 2014 Report Share Posted March 20, 2014 Usually if they are testing your catecholamines (epinephrine/norepinephrine/dopamine), they will do a blood test while you're lying down (after you've been in a quiet, dark room for 30 minutes) and then do another blood draw after you've stood up for 10 minutes. They usually compare the two numbers to determine if a person has hyperPOTS etc.If they took blood after you were on a TTT and fainted, I'm not sure what they were looking for at that point. Hopefully someone else will chime in who had a similar experience. Quote Link to comment Share on other sites More sharing options...
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