cardiactec Posted November 10, 2006 Report Share Posted November 10, 2006 hi all,just wondering if anyone had gone throug the lower body negative pressure test? it is where they use a tank like object, put a skirt thing over you and attach you to the tank, then suck with a vaccum piece as much air as they can, causing a lot of pressure from your mid section down.........i just had this test yesterday and the results showed the same BP and TACHY response as when they did a passive tilt on me........i couldnt believe it. it felt so wierd to still be lying down and have all the symptoms i was having when i am upright! strange!who has had this and what were the results like for you? also, what do they determine with this test? Quote Link to comment Share on other sites More sharing options...
ellepee Posted November 10, 2006 Report Share Posted November 10, 2006 I had it done as part of research so I don't know the results...although I do know that my heart rate significantly increased and some symptoms like nausea also became worse.What a bizarre test though huh?-such a strange feeling. I wonder who comes up with these things.....~Elle Quote Link to comment Share on other sites More sharing options...
MightyMouse Posted November 10, 2006 Report Share Posted November 10, 2006 I had it done at NIH as part of a study that I volunteered for; it provoked high tachy for me and I had a big surge of catecholamines, then I had tremors for about 20 minutes while my body tried to calm down. Was pretty "challenging" for me to get through, but easier than the heart catherization I had as part of the same study.Nina Quote Link to comment Share on other sites More sharing options...
cardiactec Posted November 10, 2006 Author Report Share Posted November 10, 2006 i had a similar response nina.....although more nausea if anything. my rates went crazy and my pressure was sitting around 88/60's.......which is low low for me, i run around 112/60's usually.....do you know why they do this test? i know it simulates the tilt table test, so why do they do this test as well? they did both the tilt on me (passive) and the LBNP. one after the other. the tilt they wanted me to do for 20 minutes, but i only lasted 15....then 10 minutes after that they put me through the LBNP test. crazy. i'm just wondering why they would do both if both produce the same effects physiologically/pathologically? does one prove or disprove a theory or pathophysiology better (like does the LBNP test confirm more of a circulatory abnormality?) .......... Quote Link to comment Share on other sites More sharing options...
MightyMouse Posted November 10, 2006 Report Share Posted November 10, 2006 Yes, they use it to simulate a TTT, but they can control the pressure on the lower half of your body, so the test is a bit more "controlled" than a standard tilt. I suppose for scientific purposes it keeps comparisons of human repsonses to a constant pressure.I always have a hard time with a large ANS surge--regardless of the cause. For example, when I was bitten by one of my students a few weeks back, I got the tremors and then ran a fever.Nina Quote Link to comment Share on other sites More sharing options...
cardiactec Posted November 10, 2006 Author Report Share Posted November 10, 2006 bitten by one of your students?!?!? geez, you poor thing! did the student have rabies or something?? lol. sorry i dont mean to make fun, it's just crazy that someone bit you!! man. glad you are better now. Quote Link to comment Share on other sites More sharing options...
Ernie Posted November 10, 2006 Report Share Posted November 10, 2006 Hi,I wonder how the doctor knows when we faint since we are lying down and we don't faint with the same BP? Quote Link to comment Share on other sites More sharing options...
cardiactec Posted November 10, 2006 Author Report Share Posted November 10, 2006 i think people usually still do faint with the LBNP, even though they are lying down. i have never fainted before (i just have POTS, not NCS) but i tell ya, during the LBNP test i felt on the verge of a faint. Quote Link to comment Share on other sites More sharing options...
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