I have been diagnosed with Chiari Malformation and just recently had the Decompression Surgery. My doctors are currently looking into possible EDS and POTS. They tested me for vasovagal syncope but it was ruled out. My vague nerve was being compressed by the Chiari Malformation which was causing the passing out I was experiencing. I have lots of questions but have yet to come across anyone who has had a similar experience to me. Since with Chiari every case can be so different.