hi please help me. i was told in 1994 i had pots but no treatment was available. yesterday my neurologist called and said the tilt table was negative, i asked why in the 90’s it was positive but now is negative, and when i wear a heart monitor my heart rate goes over 200 just going up steps. she said she did a tilt table for nerve response not a cardiac tilt table with an iv etc. has anyone ever heard of 2 different tilt tables??