I have predominately sensory PN - and autonomic - and have to be very careful when making any kind of "altitutde" change or turning head too quickly, etc.... get very dizzy - and actually fell out of the shower last fall (I have a shower chair but hang on to it to try to use my legs as much as I can).. let go for a second to reach for something - and landed right in the middle of the floor - fell so fast, and did major damage to teeth (and a 3 1/2 hour surgery to fix)...... I can actually tell when the dizziness or off-balance feeling is from autonomic or the PN in my legs - the autonomic affects my BP and heart - so feel like I'm going to pass out (blood pressure doesnt rise like it should) - while the PN just seems to all of a sudden cause me to loose my sense of where I am.... both are dangerous.... some days are better then othrs -if I'm tired and the PN is really acting up - its time to move very slow - and of course with the autonomic - everything starts to turn black so get on the floor fast as I can..... Have they looked at your cardiac condition at all? (autonomic symtom)