When my dad had open heart surgery we were told by the doctors that IT WOULD change his mental state.
You're absolutely correct. My Dad experienced a severe case of what is called "pump-head" after his CABG. There was a big time change in his personality...from an easy going attitude to something I'd rather not describe but I guarantee it wasn't pleasant. Unfortunately we were not informed of these potential changes and it took a lot of research to finally understand the situation. Over the coming months things did improve but there were lingering effects that friends and family noticed until his untimely death last fall. He was a young guy...several years younger than Clinton, but without the vices of smoking, drinking and womanizing.
Carolyn