If I might chime in. And I think all the responses and topic is wonderful. My only input would be two fold. First, they finished the ARUBA study a few years back and decided that it was not worth continuing the study because too many patients were dying. I post the study here: https://www.google.com/url?sa=t&source=web&rct=j&url=https://thejns.org/downloadpdf/journals/j-neurosurg/126/2/article-p481.xml&ved=2ahUKEwjo04ae1I7hAhXouFkKHV0wAgIQFjABegQIAxAB&usg=AOvVaw06Zpr6i-kvAJJ-be89mbI3
Second, and this is from personal experience, I waited for surgery and mine bled. Again, I am a survivor not a doctor, but I am definitely not for the wait and see approach. If you have an AVM, particularly in the brain, I would advise treatment. Because waiting and seeing, could mean losing your life.