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Smoking cigarettes and other forms of tobacco use are one of the biggest risk factors for abdominal aortic aneurysm, and high blood pressure (hypertension) caused by smoking can make aneurysms grow faster, according to the Mayo Clinic.
Hypertension (caused by smoking or other factors) damages blood vessels and increases the chances of aortic aneurysm.
An infection of the aorta known as vasculitis may sometimes contribute to an aortic aneurysm.
Other risk factors for an aortic aneurysm include being male over the age of 60; having a buildup of fat and plaque in the blood vessels (atherosclerosis); being white and having a family history of the condition.
Sometimes, an aneurysm occurs higher up in the aorta (in the chest). A thoracic aortic aneurysm may be caused, according to the Mayo Clinic, by Marfan syndrome (which damages connective tissues throughout the body) or injury to the aorta in addition to other risk factors for abdominal aortic aneurysm.
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