Screening abdominal aorta aneurysm during echocardiography: literature review and proposal for a French nationwide study.
Résumé
Several international guidelines, including those in France, recommend the screening of abdominal aorta aneurysm (AAA) by ultrasound in high-risk populations. However, this preventive screening strategy is poorly implemented. Many patients who undergo transthoracic echocardiography (TTE) are at risk of AAA as defined by the guidelines, and the cardiac ultrasound machines and probes fit perfectly for AAA screening. In this literature review, we collected data from more than 20,000 patients who underwent screening for AAA during TTE, from 10 single-centre series. While the studies differed regarding patient selection and AAA definition, the feasibility of AAA screening during TTE was excellent (mostly >90%), with the need for an average of 2-7 minutes to be added to the cardiac imaging time. The prevalence of AAA >30 mm ranged from 0.8% to 6.5%, and up to 19% in men aged >70 years. The risk factors for the presence of AAA among attendees of echocardiography laboratories were similar to those reported in the general population: age, male gender, smoking, hypertension, family history of AAA and prevalent atherosclerotic diseases. Some echocardiography-specific factors, such as left ventricular hypertrophy or dilation and poor left ventricular ejection fraction were also reported. To better assess the benefit of and indications for AAA screening during TTE in clinical practice, we propose a multicentre, nationwide, screening study in echocardiography laboratories in our country.