I actually wrote this after an individual from one of the dysautonomia Facebook groups contacted me regarding how to deal with EMS personnel, so here it goes.
Being an EMT and ski patroller the last three years, I have seen a fair amount of illness and injury. Of those that I've treated, some have had cancer, arthritis, diabetes, and some more unknown conditions like dysautonomia and CRPS. On top of that, I have my own set of medical conditions. That being said, I have been on both sides of the situation: a patient and a provider. I have had some really good providers and I've had some that were really awful.
Problems with EMS generally arise due to a lack of understanding on the part of the medical provider, but there are things that individuals with chronic illnesses can do to prevent such issues from occurring.