Stroke (multiple infarcts in left hemisphere) during by pass surgery (CABG)

My father 63yrs old suffered a massive stroke during by pass surgery (2 grafts). After the surgery it took him 3 days to open his eyes. He does not respond to anything only opens his eyes occasionally and moves his left arm over his belly. They did a tracheostomy to help him breathe and is being fed through a rice tube through his nose. His heart, lungs, kidneys etc are doing fine. The CT scan shows his left hemisphere has multiple massive infarcts (no bleeding or hemorrhage) and his right hemisphere has a few infarcts. It's been 10 days and we see no improvement other than him yawning or moving his eye balls. Can someone tell us if they had a similar experience and how long it took to recover or if there is any hope for my father. What medications are administered for infarcts? We are living a nightmare any help would be much appreciated.