Louise, I'm sorry that you are going through so much, as is your husband.

I'm not sure this is the correct forum for you. Does your husband have myasthenia gravis?

What kind of doctor assessed him for brain damage? Did they do an MRI? He should be seeing a neurologist and/or a neuropsychologist. Also, I would highly suggest testing him for a B12 deficiency, plus other things such as a metabolic panel. A B12 deficiency and abnormal electrolyte levels can affect the brain.

Does he have a good cardiologist? If so, did they assess the cause for the cardiac arrest? Is he on drugs now that could cause mental changes?

There are other types of dementia, aside from Alzheimer's, such as frontotemporal dementia. A B12 deficiency can appear like dementia.

I hope you can find some answers from doctors. There has to be a reason for these mental changes. Has he been tested for sleep apnea? That is very hard on the heart and brain. I wish I could help you more! Please don't forget to take care of yourself as well!!!

Annie