Abstract 12987: Annulus Deformity Index Obtained by Using Four-dimension Multidetector Computed Tomography in Patients With Severe Aortic Stenosis is Useful for Predicting Over Moderate Paravalvular Regurgitation Immediately After Transcatheter Aortic Valve Replacement

Background: Correct assessment of annulus diameter before transcatheter aortic valve replacement (TAVR) using multidetector computed tomography (MDCT) is important to minimize complications such as annulus rupture and paravalvular aortic regurgitation (PVR). The form of the annulus was previously reported to be oval, while the form of the SAPIEN XT valve was circular. However, the association between the ellipsoid degree of annulus and PVR remains unclear. A new technique of measuring variability in a region of interest through a cardiac cycle using voxel tracking for image data obtained by four-dimensional MDCT (4D-MDCT) was recently reported. This technology allows evaluation of changes of the annulus through the cardiac cycle, and detection of the cardiac phase of maximum and minimum annulus area correctly compared with conventional methods. In the present study, we examined whether evaluating the annulus ellipsoid degree obtained by 4D-MDCT is useful for predicting the occurrence of PVR immediately af...