2nd September 2020

A 60-year-old male presents with a relatively sudden onset of cognitive decline

A 60-year-old male presents with a relatively sudden onset of cognitive decline, following several TIAs some months ago. Consequently, based on his history and risk factors, he is diagnosed with vascular dementia, 

Select the SINGLE most specific risk factor to the development of vascular dementia over other forms of dementia. Select ONE option only.