ISSN 1305-3825 | E-ISSN 1305-3612
Cardiovascular Imaging - Original Article
Prevalence of aortic root dilation in patients with CT angiography of the aorta
1 Department of Radiology, University of Pittsburgh Medical Center, Thoracic Imaging Division, Pittsburgh, PA, USA  
2 Molecular Imaging Program, National Cancer Institute National Institutes of Health, Bethesda, Maryland, USA  
Diagn Interv Radiol 2011; 17: 272-276
DOI: 10.4261/1305-3825.DIR.3437-10.1
Key Words: aortic root dilation • CT angiography• thoracic aorta
Abstract

PURPOSE
To investigate the prevalence of aortic root dilation in patients who underwent CT angiography of the thoracic aorta.

 

MATERIALS AND METHODS
In 95 patients, 64-slice multislice computed tomography was performed for evaluation of the thoracic aorta. Measurements of the annulus, sinuses of valsalva (SOV), sinotubular junction (STJ), and maximum ascending aorta (AAo) were made by double oblique multiplanar reformation (MPR). For the AAo, STJ, and SOV, dilation was defined as greater than 40 mm; for annulus, the dilation criterion was greater than 27 mm.

 

RESULTS
Overall, 52 patients were diagnosed with a dilated AAo. Of those patients with dilated AAo, 28 patients had a dilated annulus, 27 patients had dilated SOV, and 11 patients had STJ dilation. Forty-three patients presented with normal AAo; 12 patients had annulus dilation; 12 patients had SOV dilation; and 4 patients had STJ dilation. In patients with dilated AAo, 38% also had a dilated annulus, 52% showed SOV dilation, and 21% presented with STJ dilation, compared to 28% annulus dilation, 28% SOV dilation, and 9% STJ dilation in patients with an AAo of normal caliber.

 

CONCLUSION
Our data indicate a higher prevalence of aortic root dilation among patients with dilated AAo.

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