I personally have not seen anyone who suffered any of those nor do I know any colleagues’ patients who have. The clots formed typically mimic that of atherosclerotic disease so we would expect more occlusion of the descending aorta, coronary vessels, popliteal arteries, and carotids in that order. For strokes to occur through a piece of the clot breaking off, it would depend on three things— if the clot were present in carotids, it’s likelihood of embolizing (traveling elsewhere), and the rate that it is broken down (most clots are broken down by plasmin-induced fibrinolysis - in case you are interested in researching it).

Rapid onset dementia is unlikely to occur from that type of embolism as the caliber of the carotids is typically too small to throw a massive clot all at once. I was always taught ROD/RPD was most likely due to an infectious agent like prion disease or genetics (supranuclear palsy- an aggressive subtype of Parkinson’s). If anything, I would assume there would be a chronic vascular dementia that takes multiple clots over years to occur, which is VERY unlikely from any infection since infections resolve typically in under a month.

Brain fogginess is typically due to poor blood perfusion to your brain. If you suffer a cardiac event, that’s a possibility. I know some people claim that it’s due to direct neural damage by Covid but that does not appear to be in any of the literature that I have read.