An enlargement of the first part of the aorta as it leaves the heart.

Aortic aneurysms can develop slowly over many years, often without symptoms. When detected early, they can be monitored and treated before they become life-threatening. Risk factors include high blood pressure, smoking, atherosclerosis, and genetic conditions such as Marfan syndrome.

Many aortic aneurysms cause no symptoms until they rupture or dissect. When symptoms do occur, they may include deep pain in the chest, back, or abdomen, depending on the location.

Treatment depends on the size and growth rate of the aneurysm. Options include watchful waiting with regular imaging, medication to control blood pressure, endovascular stent grafting (EVAR/TEVAR), and open surgical repair for larger or rapidly growing aneurysms.