HOW DOES A BRAIN ANEURYSM DEVELOP?
Like most diseases, brain aneurysms develop for reasons that may be “congenital” (i.e., the person was born with some defect in the brain artery wall, or an abnormal communication in the brain circulation or, e.g., a hereditary disease which lead to and worsened a defect in a brain vessel wall) or “acquired” (i.e., the person was not born with any such defect, but some event or illness during life lead to the development of the brain aneurysm). Although the congenital theory was thought to be more important in the past (and it still is in cases of persons with inherited connective tissue diseases which weaken the artery wall from the beginning), it is now thought that acquired reasons are the main ones underlying the development of brain aneurysms. Perhaps the most significant of the acquired reasons are smoking (which is associated with injury to the blood vessel wall, particularly the endothelium; and high blood pressure (ystemic hypertension; which causes additional stress on the bl
