Stroke with atrial fibrillation or atrial flutter: a descriptive population-based study from the Brest stroke registry.

Background: In the 1990s, epidemiological studies estimated the prevalence of stroke caused by atrial fibrillation (AF) at about 15 %. Given the aging population, there is a rise in the number of AF patients. AF prevention guidelines based on clinical practice and the literature have been published and updated since 2001.

[Cerebral microbleeds].

Microbleedscorrespond to small areas of hypointense signals on MRI T2 sequences of the brain. Their presence is correlated with age and hypertension. They are frequently associated with lacunae and with hyperintense (bright) signals in white matter.