Abstract 12930: Usefulness of Routine Screening for Abdominal Aortic Aneurysm during Transthoracic Echocardiography: A Comparison of Screening During Abdominal Ultrasonography
Introduction: Abdominal aortic aneurysm (AAA) is often clinically silent unless there is a rupture. Transthoracic echocardiography (TTE) is one of the most commonly used noninvasive methods for patients with cardiovascular diseases and risk factors for atherosclerosis, and it can facilitate screening for AAA quickly and easily.
Hypothesis: We assessed the hypothesis that routine screening for AAA during TTE is clinically useful.
Methods: A total of 6,719 patients who were scheduled for TTE (TTE group) from 2009 to 2010 in our hospital were enrolled. At the end of the TTE protocol, the abdominal aorta was evaluated from the subxiphoid window to the level of the bifurcation of common femoral arteries. The patients who received scheduled abdominal ultrasonography (AUS), a total of 15,433 patients (AUS group), were analyzed for comparison. The patients with known AAA were excluded.
Results: The patient background was significantly different between the TTE group and AUS group: male comprised 52.3% of the TTE group and 41.0% of the AUS group, the mean age was 66.1+15.1 and 52.9+17.5 years, respectively, (p<0.0001), and the mean number of comorbidities was 1.76 and 0.09, respectively (p<0.0001). AAA was identified in 136 patients during TTE (1.8%) and 95 patients during AUS (0.6%). The prevalence of AAA in the TTE group was higher than in the AUS group (p<0.0001, Mantel-Haenszel test). Among the patients with AAA, the prevalence of patients whose AAA diameter was more than 45 mm and who was treated by surgery or endovascular repair was 25.7 and 19.0%, respectively, in the TTE group, which was significantly higher compared to 3.1 and 4.1%, respectively, in the AUS group (p=0.005).
Conclusion: The patients who received scheduled TTE in the hospital had a higher risk of atherosclerosis and a higher prevalence of AAA than those who received scheduled AUS. Routine screening for AAA during TTE is thought to be clinically useful for the detection of asymptomatic patients with AAA.
- © 2012 by American Heart Association, Inc.