Abdominal Aortic Aneurysm Diagnosis and Management

Clinical Context and Interpretation

The American College of Radiology recommends that the normal infrarenal abdominal aorta measures up to 2 cm in anteroposterior diameter, which is a key factor in distinguishing normal aortic pulsations from pathological conditions in patients with risk factors such as age, hypertension, and smoking history 1
The American Heart Association suggests that abdominal aortic aneurysm (AAA) should be considered when a pulsatile mass is palpable in a patient with risk factors, including age >65 years, hypertension, smoking history, or family history of AAA, with a classic triad of fever, pain, and pulsatile abdominal mass being uncommon 2, 1
The American College of Radiology states that risk factors for AAA include age >65 years, hypertension, smoking history, or family history of AAA, which are essential considerations in the clinical evaluation of patients with epigastric pulsations 1

The American College of Radiology recommends assessing patient characteristics, such as body habitus and age, and cardiovascular risk factors, to determine the likelihood of AAA in patients with epigastric pulsations 1
The Society of Radiologists in Ultrasound suggests that ultrasound is the first-line imaging modality if AAA is suspected, with a sensitivity of 95-100% and specificity near 100% for detecting AAA, particularly in patients with high-risk profiles 3, 1
The American College of Radiology recommends CT angiography for pre-intervention planning when AAA ≥5.5 cm or symptomatic, which is a critical step in the management of patients with AAA 1

The American Heart Association notes that a pulsatile epigastric finding can represent normal aortic pulsations transmitted through the abdominal wall, tortuous abdominal aorta without true aneurysm, transmitted pulsations to a non-vascular mass, or superior mesenteric artery aneurysm, which are essential considerations in the differential diagnosis of epigastric pulsations 1, 2