Abstract 3737: Assessment of Aortic Stenosis by Three-dimensional Echocardiography: Comparison with Standard Echocardiographic Techniques and Cardiac Catheterization
Backgrond. Accurate assessment of aortic valve area (AVA) is important for clinical decision making in patients with significant AS regardless of their symptoms. The role of three- dimensional echocardiography (3D) in assessment of aortic stenosis (AS) has been not evaluated.
Objectives. To evaluate the feasibility and reproducibility of real-time three- dimensional echocardiography (RT3D) and 3D-guided two- dimensional planimetry (3D/2D) for assessment of AS and compare results using these two 3D techniques with standard echocardiographic methods and cardiac catheterization.
Methods. AVA was estimated by transthoracic echo-Doppler (TTE) and by direct planimetry using transesophageal echocardiography (TEE) as well as RT3D and 3D/2D. 15 patients underwent assessment of AS using cardiac catheterization.
Results 33 patients with AS comprised this study (20 men, age 70.2± 13.6). The mean AVA, absolute differences and correlations between methods are presented in the table⇓. Correlation for AVA between planimetric methods as 3D/2D, RT3D, TEE and cardiac catheterization was r=0.81, p<0.0001; r=0.86, p< 0.0001 and r=0.76, p<0.001, respectively. The intra-observer variation coefficients (VC) for 3D/2D, RT3D and TEE were 5.6 %, 6.2 %,6.5% , and inter-observer VC were 6.4% ,5.9%,9.0% , respectively.
Conclusions The 3D (RT3D and 3D-guided two- dimensional) echo methods for planimetry of the AVA showed good agreement with standard TEE technique and flow derived methods (echo Doppler and cardiac catheterization-).Compared with TEE both 3D methods were superior for AVA asassessed by flow derived methods and were more reproducible. 3D aortic valve planimetry is a non invasive technique which provides accurate, reliable quantative assessment of aortic valve area.