question: I just had an MRI that shows I have had several small strokes that I was totally unaware of having. I have high blood pressure that is controlled by medication. It varies from 150/80 to 130/ 73. It is really all over the place but is seldom greater than 150/80. I am concerned that these little strokes may cause dementia. What is the likelihood of this happening or that I may have a major stroke? I am 70 years old.