What is the life expectancy after massive occipital lobe stroke followed by aggressive dementia?

Probably not so good: Please consult your neurologist. Massive occipital stroke is bad and so is aggressive dementia. Stroke alone can cause quality-adjusted life expectancy to drop by about 12 years. Also on the average a patient with dementia lives about 4-5 years after diagnosis. The combination of both is difficult to judge but probably is significant.

Ask doctor: Predicting life expectancy is very complicated and requires dozens or more pieces of information. Seek information from the persons health care team.

Hard to predict: Sounds like a posterior cerebral artery distribution stroke which would have affected vision but also mesial temporal lobe memory function. This might have been triggered by basilar artery thrombosis, which may leave pt at risk for further stroke damage but also mass effect. Hard to assess life expectancy here, and question of cardiac involvement as a primary factor comes into the equation.