Healthy, sharp, active till 90, isch cva. Fell, fracture pelvis at 92/ weak thigh shaking limb. Rapid cog decline and hearing sounds not there 6mo out?

What is question? This sounds like a tragic complication of an ischemic (bloot clotting stroke) but there is no specific question here, rather a list of symptoms. Please rephrase into a specific question and I am sure we can help...
Several choices. Fractures of bones can cause showers of fatty particles traveling to brain (fat emboli) resulting in multiple, simultaneous small strokes bring on cognitive decline. Sometimes people on the verge of clinical alzheimers (or other dementias) become rapidly symptomatic after such a major trauma absent any direct brain injury. Have neurology consult done.