Multimodality Imaging of Aortic Dimensions: Comparison of Transthoracic Echocardiography with Multidetector Row Computed Tomography

作者：Tsang James F; Lytwyn Matthew; Farag Ashraf; Zeglinski Matthew; Wallace Kerrett; daSilva Megan; Bohonis Sheena; Walker Jonathan R; Tam James W; Strzelczyk Jacek; Jassal Davinder S^*

来源：Echocardiography-A Journal of Cardiovascular Ultrasound and Allied Techniques, 2012, 29(6): 735-741.

DOI：10.1111/j.1540-8175.2012.01666.x

• transthoracic echocardiography
• computed tomography
• aortic root

Background: With recent advances in multimodality cardiac imaging, a number of methods exist for the noninvasive assessment of aortic disease. Although multidetector row computed tomography (MDCT) remains the gold standard for aortic measurements, there are a number of limitations including radiation and contrast-induced nephropathy. Transthoracic echocardiography (TTE) is an alternative to MDCT for providing accurate anatomic assessment of aortic root and ascending aorta dimensions. Objectives and Methods: To determine the accuracy of two-dimensional (2D) TTE for determining aortic measurements in comparison to MDCT, a retrospective study of individuals with varying aortic root and ascending aorta dimensions was performed. Results: There were 116 patients (77 males, mean age 49 +/- 12 years) in total. The maximum aortic diameters by 2D TTE were 26.1 +/- 4.3 mm (annulus), 32.4 +/- 5.6 mm (sinuses), 30.1 +/- 5.9 mm (sinotubular [ST] junction), and 33.4 +/- 7.3 mm (ascending aorta). The maximum aortic diameters by MDCT were 30.1 +/- 4.1 mm (annulus), 35.8 +/- 5.8 mm (sinuses), 33.2 +/- 5.9 mm (ST junction), and 37.4 +/- 7.6 mm (ascending aorta). There was good to excellent correlation between 2D TTE and MDCT at all four levels of the aorta (annulus: r = 0.84; sinuses: r = 0.93; ST junction: r = 0.93; ascending aorta: r = 0.88). There was a consistent underestimation of aortic measurements obtained by 2D TTE when compared to MDCT. Conclusion: 2DTTE is a feasible, accurate, and reproducible method for the noninvasive assessment of thoracic aortic diameters as compared to MDCT. (Echocardiography 2012;29:735-741)

• 出版日期2012-7