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. 2017 Nov 4;6(11):e007353. doi: 10.1161/JAHA.117.007353

Figure 2.

Figure 2

Predicting neo–left ventricular outflow tract (LVOT) area in a native mitral valve on postcontrast cardiac computerized tomography (CT). A, Left ventricle short‐axis multiplanar reformat (MPR) at the level of the mitral annulus demonstrates mitral annulus measurements. Note the mild mitral annular calcification. B, A 3‐dimensional (3D) circular volume‐rendered segmentation (red circle) is performed at the corresponding level of the mitral annulus with the dimensions of the proposed prosthetic valve (in this case a 29‐mm Edwards SAPIEN XT valve). C, This creates a 3D segmented cylindrical volume (green cylinder), viewed here in profile. D, Once segmented, the segmented 3D volume can be projected onto the CT image data, as demonstrated on this 4‐chamber MPR (red volume). E, The proposed prosthetic valve height is then measured (line) and segmented (F) as demonstrated on these 2‐chamber MPRs. G, A 3‐chamber MPR can determine the level of the minimal neo‐LVOT (blue line), and planimetry of the neo‐LVOT can be performed in an orthogonal plane (H).