CT-Angiography–Based Evaluation of the Aortic Annulus for Prosthesis Sizing in Transcatheter Aortic Valve Implantation (TAVI)–Predictive Value and Optimal Thresholds for Major Anatomic Parameters
Figure 2
Examples of anatomic measurements at the aortic annulus performed for this study:
isotropic small field-of-view CTA dataset of a 78 year old female patient with severe aortic stenosis, A) sagittal reformation and B) coronal reformation showing the orientation of the aortic annulus plane, C) double-oblique reformation of the aortic valve annulus, demonstrating the diameter of the long axis (black line), the diameter of the short axis (blue line), the annulus circumference (red polygonal), and annulus area (yellow shading). D) angiographic image after implantation of a 26 mm model of the Edward Sapien XT valve prosthesis demonstrates no paravalvular leakage.