Thanks for your reply! I wish I could I find an EDS knowledgeable doctor that would be willing to try the Diamox for me. The strangling/choking sensations are provoked by sitting straight up, I will most often get them while driving or in a desk. It took me a while to figure out they were driven by my posture- the first episode caused me to pull over while driving. The only thing the neuro I have seen has recommended is wearing a c-collar around.