Corrina,
Prompted by your question, I did a little online searching and the impression I get is that hyperbaric (= high pressure) oxygen treatment is something that can be used for a number of things to relieve symptoms or to facilitate recovery, rather than as a curative treatment. In the articles I found, for example, it is found to relieve symptoms of cluster headaches but no correlation with improvement in migraine headaches (which I believe are most relevant for this community); I also found reference to use for MS but again no definite beneficial effect found; and related to recovery after cancer.
The most interesting of these was the recovery after cancer, where damage to cells from radiotherapy treatment meant that the oxygenation of the blood reaching radiation-damaged cells was poor, this could be improved with hyperbaric oxygenation. This could have application (in my un-medical opinion) where people are similarly recovering from damage via radiation therapy for an AVM: it might aid recovery after the radiation treatment: but it would not be a substitute for the radiation treatment itself.
The specific article I found is here:
Please ensure you look to your doctor for options around treatment. Unproven or “complimentary” medicine treatments that are not part of main stream medical recommendations are to be treated cautiously, in line with our site etiquette.
I’ve moved this conversation to the “complimentary therapies” category as a precaution.
I hope the above information helps,
Richard