Background: Aortic valve calcification (AVC) quantification is computed from multidetector computed tomography (MDCT). The aim of this study was to test the hypothesis that three-dimensional (3D) transthoracic echocardiography can be used to provide a bedside method to assess AVC. Methods: The study included 94 patients (mean age, 78 ± 12 years; mean aortic valve [AV] area, 1.0 ± 0.6 cm2) referred for MDCT and echocardiography for AV assessment. Apical 3D full-volume data sets focused on the AV region were acquired during transthoracic echocardiography, and a region-growing algorithm was applied offline to compute 3D transthoracic echocardiographic AVC (AVC-3DEcho). AVC-3DEcho was compared with AVC by MDCT and with calcium weight in the subgroup of patients referred for surgery, with explanted AVs analyzed by a pathologist (n = 22). Results: In the explanted valve group, AVC-3DEcho score exhibited fair correlations with MDCT score (r = 0.85, P <.001), calcium load (r = 0.81, P <.001), and peak AV velocity (r = 0.64, P <.001). In the overall population, AVC-3DEcho score correlated modestly with MDCT score (r = 0.61, P <.001) but had similar accuracy to identify severe aortic stenosis (area under the curve = 0.94). AVC-3DEcho > 1,054 mm3 identified severe aortic stenosis with specificity of 100% and sensitivity of 76%. In addition, AVC-3DEcho was associated with the presence of significant paravalvular regurgitation after transcatheter aortic valve implantation. Finally, intraobserver and interobserver variability for AVC-3DEcho score was 4.2% and 8.9%, respectively. Conclusions: AVC-3DEcho correlated with calcium weight obtained from pathologic analysis and MDCT. These data suggest that a bedside method for quantifying AV calcification with ultrasound is feasible.
A New Three-Dimensional Echocardiography Method to Quantify Aortic Valve Calcification / d'Humieres, T.; Faivre, L.; Chammous, E.; Deux, J. -F.; Bergoend, E.; Fiore, A.; Radu, C.; Couetil, J. -P.; Benhaiem, N.; Derumeaux, G.; Dubois-Rande, J. -L.; Ternacle, J.; Fard, D.; Lim, P.. - In: JOURNAL OF THE AMERICAN SOCIETY OF ECHOCARDIOGRAPHY. - ISSN 0894-7317. - 31:10(2018), pp. 1073-1079. [10.1016/j.echo.2018.05.012]
A New Three-Dimensional Echocardiography Method to Quantify Aortic Valve Calcification
Fiore A.;
2018
Abstract
Background: Aortic valve calcification (AVC) quantification is computed from multidetector computed tomography (MDCT). The aim of this study was to test the hypothesis that three-dimensional (3D) transthoracic echocardiography can be used to provide a bedside method to assess AVC. Methods: The study included 94 patients (mean age, 78 ± 12 years; mean aortic valve [AV] area, 1.0 ± 0.6 cm2) referred for MDCT and echocardiography for AV assessment. Apical 3D full-volume data sets focused on the AV region were acquired during transthoracic echocardiography, and a region-growing algorithm was applied offline to compute 3D transthoracic echocardiographic AVC (AVC-3DEcho). AVC-3DEcho was compared with AVC by MDCT and with calcium weight in the subgroup of patients referred for surgery, with explanted AVs analyzed by a pathologist (n = 22). Results: In the explanted valve group, AVC-3DEcho score exhibited fair correlations with MDCT score (r = 0.85, P <.001), calcium load (r = 0.81, P <.001), and peak AV velocity (r = 0.64, P <.001). In the overall population, AVC-3DEcho score correlated modestly with MDCT score (r = 0.61, P <.001) but had similar accuracy to identify severe aortic stenosis (area under the curve = 0.94). AVC-3DEcho > 1,054 mm3 identified severe aortic stenosis with specificity of 100% and sensitivity of 76%. In addition, AVC-3DEcho was associated with the presence of significant paravalvular regurgitation after transcatheter aortic valve implantation. Finally, intraobserver and interobserver variability for AVC-3DEcho score was 4.2% and 8.9%, respectively. Conclusions: AVC-3DEcho correlated with calcium weight obtained from pathologic analysis and MDCT. These data suggest that a bedside method for quantifying AV calcification with ultrasound is feasible.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
