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Aneurysm or steno obstruction of the abdominal aorta

Aneurysm or steno obstruction of the abdominal aorta

An aneurysm of the abdominal aorta is a permanent distention of the aorta in its abdominal tract, which tends to be progressive under the action of blood pressure, and is due to a weakening of the arterial wall. Within it a thrombus may form, which can detach and be transported by the blood flow and thus obstruct smaller arterial vessels (embolism).