Ultrasound screening for abdominal aortic aneurysm in primary care

Abstract

Introduction: Abdominal aortic aneurysm (AAA) constitutes a pathology with high mortality. There is currently no screening program implemented in primary care in Spain.

Objectives: To evaluate the usefulness of ultrasound in the detection of AAA in the at-risk population in primary care. Secondarily, to identify subjects whose vascular risk (VR) should be reclassified and to determine whether AAA is associated with the presence of carotid plaque and other risk factors.

Material and methods: Cross-sectional, descriptive, multicenter, national, descriptive study in primary care.

Subjects: A consecutive selection of hypertensive males aged between 65 and 75 who are either smokers or former smokers, or individuals over the age of 50 of both sexes with a family history of AAA.

Measurements: Diameter of abdominal aorta and iliac arteries; detection of abdominal aortic and carotid atherosclerotic plaque. VR was calculated at the beginning and after testing (SCORE).

Results: One hundred and fifty patients were analyzed (age: 68.3±5 years; 89.3% male). Baseline RV was high/very high in 55.3%. AAA was detected in 12 patients (8%; 95% CI: 4-12); aortic ectasia in 13 (8.7%); abdominal aortic plaque in 44% and carotid plaque in 62% of the participants. VR was reclassified in 50% of subjects. The detection of AAA or ectasia was associated with the presence of carotid plaque, current smoking and lipoprotein(a), p<0.01.

Conclusions: The prevalence of AAA in patients with VR is high. Ultrasound in primary care allows detection of AAA and subclinical atherosclerosis and consequently reclassification of the VR, demonstrating its utility in screening for AAA in the at-risk population.

Keywords: Abdominal aortic aneurysm; Aneurisma de aorta abdominal; Atención primaria; Aterosclerosis subclínica; Primary care; Subclinical atherosclerosis.