question: Hi, So my Grandpa is 89 and is curently in the hospital.  He has had Atrial Fibrillation for sometime now but has been very healthy up until the last couple months.  He wil be fine one day then wake up the next and not be able to breath, walk and then is very confused and disoriented.  We have him on blood thinners and are just trying to get to the bottom of whats happening.  they feel these epsisodes are either caused from his heart or from these mini strokes in his brain.  I just want another opinion or maybe some advice on possible treatments for him.  he is a very strong man and is a fighter and wants to get better... any thoughts?