Comparative assessment of ascending aorta diameter using three-dimensional trans-thoracic echocardiography vs. ECG-gated computerized tomographic angiography. - 25/12/18
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Résumé |
Introduction |
Currently, 2D TTE is used in routine practice for the follow-up of ascending aorta aneurism (AAA). When the maximal aortic diameter reaches the surgical threshold, ECG-gated computerized tomographic angiography (CT) is used to confirm the diameter. No study has evaluated ascending aortic diameter measurement with 3D trans-thoracic echocardiography (3DTTE). The aim of this study was to compare 3DTTE with CT for assessment of the aortic root diameters.
Methods |
Standard 2D-TTE, followed with a 3D volume acquisition (3DTTE), and CT were performed in patients seen in our clinic for an AAA. After a double oblique reconstruction, measurements were obtained, using the inner-to-inner technique in end-diastole in a strict transverse plane passing through the maximal diameter ‘cusp to cusp’ for each cusp in 3D-TTE and CT. CT and TTE were performed within 3 months. Transverse plan of the sinus of Valsalva was used in 2DTTE, 3DTTE and CT to measure: diameters between non-coronary and right coronary sinuses (2DNR, 3DNR and CTNR), between left and right coronary sinuses (2DLR, 3DLR, CTLR), and between left and non-coronary sinuses (2DLN 3DLN, CTLN). Correlation between diameters was evaluated by Bland–Altmann diagrams and Spearman's correlation coefficient.
Results |
Forty-four consecutive patients with ascending aortic aneurysm were included (49+/−15 years, men 77%). Diameters between CT and 2DTTE were statistically different except for the NR diameter (mean differences: CTNR-2DNR=0.02mm, P=0.48, CTLR-2DLR=−2.1mm, P=0.0003, CTLN-2DLN=−2.1mm, P=0.01). Diameters between MDCT and 3DTTE were similar (mean differences: CTNR−3DNR=0mm, P=0.3, CTLR-3DLR=0.1mm, P=0.3, CTLN−3DLN=−0.2mm, P=0.4). In addition, MDCT and 3DTTE diameters showed a good correlation (rNR=0.95, rLR=0.94 rLN=0.91) (Fig. 1).
Conclusion |
Aortic root diameters obtained with 3DTTE are highly correlated with CT diameters. 3D TTE may be an additional follow-up technique in patients with aortic root aneurysms.
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Vol 11 - N° 1
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