Aneurysms are defined as a focal enlargement of the artery to greater than 1.5 times its expected normal diameter. A segment of abdominal aorta larger than 3 cm in diameter is therefore considered to be an abdominal aortic aneurysm (AAA). The prevalence of AAA is highest in white males. The pathogenesis is multifactorial, likely involving aortic wall degeneration by atherosclerosis, chronic inflammation, and increased proteolytic enzyme activity. Risk factors for AAA include advanced age, male gender, tobacco use, emphysema, atherosclerosis, and hypertension (HTN). First-degree relatives of those diagnosed with AAA have a 15–20% incidence of AAA and should therefore be advised to undergo ultrasound screening. Current screening recommendations also include performing abdominal ultrasound in all males over 65 years of age with a history of smoking. Approximately 80% of AAAs are associated with smoking.
KeywordsAbdominal Aortic Aneurysm Abdominal Aortic Aneurysm Endovascular Repair Abdominal Aortic Aneurysm Repair Chronic Mesenteric Ischemia
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