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J Echocardiogr Vol.5, No.2, 2007 55 Aortic regurgitation (AR) may be congenital or acquired, caused by either abnormalities of the aortic root or the valve itself. Surgical management is recommended in patients with significant AR enough to reduce left ventricular function. Aortic valve (AV) replacement is a common surgical strategy for significant AR, but in some patients who have annuloaortic ectasia (AAE) without leaflets abnormalities, valve-preserving aortic replacement can be considered[1]. Therefore, the knowledge of aortic annulus and leaflets geometry is very important in considering the surgical strategy. Recently developed real-time 3-dimensional (3-D) echocardiography can be used to provide fast and noninvasive estimates with high image resolution that is more accurate and physiologically realistic than those measured by conventional imaging techniques[2]. We have already demonstrated the geometry of the mitral leaflets and annulus in patients with ischemic functional mitral regurgitation using this system[3-5]. In the present study we evaluated the 3-D geometry of the aortic annulus and leaflets in normal subjects and in patients who had different etiologies of significant AR.

Three-Dimensional Geometry of Aortic Valve: A new Trial of Visualization With Real-Time Three-Dimensional Echocardiography