My Dad has had Stroke whilst having a hip replacement operation

It is assumed the stroke happened whilst under the general anesthetic for the hip replacement, when in recovery a nurse noticed his mouth drooping and that his speech was slurred. The doctors aren't able to give him the blood thinning drug they normally give to stroke patients because of his hip wound, it would cause him to bleed to death. He as at risk of another stroke, what can be done to help him? (taking into account that he has heart problems [had a triple heart bypass] and has bladder cancer in remmission)