I find this very unusual. Yes, it's a possibility. But birds go to the vet all the time, get handled, have stressful procedures...and don't go into cardiac arrest. I understand that it's more of a risk because of your bird's history, but there has to be a way to get her healthcare. Where are you located? Some states have mobile vets that will see birds at your house. If you tell us your general location, we might be able to help you locate something like this.She even went as far as telling me that before she handles a bird (mine isn't very tame) she always warns the owner of a possible cardiac arrest.