It is an abnormal dilation of a vessel (artery or vein) in the brain caused by several factors (atherosclerosis, congenital defect, trauma, infection, etc …) that promote the formation of an area of weakness of its vessel wall. It is a problem that affects 2 to 5% of the population, can happen to anyone at any age (although more frequent in adults) and can result in a hemorrhage (bleeding) reaction in the brain, most often without notice. Warning signs for aneurysm rupture can include headache unprecedented and intense sudden onset, associated with blurred vision, loss of consciousness, nausea, vomiting, convulsions, sudden drooping eyelid, among others.
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