As you have described in the history your father had a stroke
. Since you might have read lot about stroke on the internet I will directly come to your questions :
Recovery after stroke :
1. Majority of patients >2/3rd who survive the first month after stroke improve, many back to their pre-stroke level of function.
2. The rate of recovery of all impairments is maximum in the first few weeks, slows down after 2 or 3 months, and probably stops at about 6-12 months after stroke.
3. It is very difficult to predict to what degree a person will recover immediately after stroke but becomes somewhat easier and more relevant, once it is clear that the person is likely to survive (which is at about 2 weeks after stroke).
4. At this stage good prognostic signs include young age, initially mild functional impairment, fully conscious, god sitting balance, normal orientation, no memory impairment, good bladder control, and rapid improvement.
Survival after stroke :
1. 90% of patients with first episode of stroke remain alive at the end one month.
2. Best single predictor of early death is impaired consciousness.
3. After the first month, the risk of death becomes much less (about 7% per year) but it is still about twice that of the background population because stroke patients are particularly likely to die of a further stroke and even more likely to die of the consequences of other associated diseases like heart disease
Wish a good health to you and your family members