[Primary stroke prevention in the elderly: current evidence in the treatment of arterial hypertension].

After age, arterial hypertension (AHT) is the most significant risk factor associated with stroke, and accounts for more than 25% of all strokes. The prevalence of AHT in the elderly in Spain is approximately 70%, which means that there are more than 5 million people over 65 years-old with hypertension in our country. There are currently numerous trials and meta-analyses that demonstrate that antihypertensive treatment clearly reduces the risk of stroke in elderly, and very elderly (≥80 years) subjects. However there are many areas of uncertainty such as, for example, when to start antihypertensive treatment, to what level should the blood pressure be lowered, or what is the best antihypertensive in the prevention of stroke in this population. In this article we present a review of the current evidence in the prevention of stroke in the elderly patient by means of treatment of the AHT.