Need someone with knowledge on this

My husband was once very abusive to me psychologically and verbally. Psychiatric treatment failed us bc they did things that put his life in danger and other things that made him feel as if he was in his full rights to abuse me. Not going to get into details, but just know this is not me believing his excuses .. this is me telling you what happened bc both of us attended each session. I got to see and be part of everything that went on both in those psych sessions and in our personal lives.

Now, at one point, it got so bad I left and went to an abuse shelter. Again, not getting into details .. but after a few months passed (wherein we had already divorced), circumstances arose (very unplanned circumstances) that resulted in the two of us living together again. We did this for two more years, and remarried. Not once during that time was he abusive at all. We have been remarried now about six years. March of 2022, he had two strokes and a heart attack. Since that time, he has moments (sometimes long moments) of time wherein he reverts back to abusive behaviors now. I understand it's because of his strokes.

What I do not understand is how to get his mind back in the place where he wants to change that part of himself again.

It affected him physically to where his muscles are weakened significantly and I therefore need to help him with many things. But in order to do that, I need to be healthy mentally as well as physically.. so if you have knowledge on how to help stroke victims understand this behavior is not always as deserved toward others as their mind causes them to believe (due to their brain damage), please give me some ideas.

Thanks