No.
She had immediate access to medical services, but apparently declined (I would’ve too, not knowing what I know now).
Once she fell ill, she received immediate treatment.
She was flown to the US only after she was brain dead.
Yup, unfortunately, she missed that ‘Golden Hour’ that is so critical in certain situations. Nothing that many of us haven’t done or wouldn’t do. Since I’m sure she had her own insurance and was not a citizen of Canada, she probably had everything medically possible. She wouldn’t have been using their coverage. I’d bet my firstborn that nothing was denied medically.