I think that at the end of the day you have to think about this: what if the shock was succesful and now you got to manage post arrest... Everything else prior to the use of aed is nothing in comparison to what happens than. If you have a plan for that situation than you are golden. I've been a medic for a while now and only twice in my career pts were able to breathe on their own after defib and required almost no follow up care. Rest of them required massive drug support and managment otherwise they would arrest again.