Does the divorce oath of a man suffering from Alzheimer's take effect if he utters it while in a state of anger, and if it does, what is its expiation?

A father's divorce declaration is not effective if he utters it while unaware of what he is saying due to illness and extreme anger, as he is not held accountable under such circumstances. Consequently, his wife remains under his marital bond. Merely swearing by divorce does not make it effective unless he breaks his oath.