A study in the journal Lancet Neurology looked at the effect of lowering blood pressure in more than 3,000 patients over the age of 80. It found that treatment with medications called diuretics and ACE inhibitors reduced dementia by 13 percent.
This is the same study that was stopped early because it was such a success in cutting the risk of stroke and death. Doctors say more research is needed but it suggests improving circulation may also help memory problems.
