[Dementia and hypertension].

Dementia and associated diseases will have increasing impact on economical and social system in most countries. As long as no causal therapy for dementia exists, primary prevention, diagnosis and control of risk factors for dementia are crucial. Uncontrolled hypertension is one of the most important risk factors for vascular dementia. An early antihypertensive treatment may reduce cognitive impairment or at least prolong the time to onset of dementia.