Fig. 2. Three-dimensional CT image. The blue area represents the MS under the NCS. The distance from the bottom of the left non-crossing to the MS is 15.9 mm, and the distance of 5.2 mm from the left-non commissure to the LCA. The yellow line is the “L”-fashioned incision. CT: computed tomography; MS: membranous septum; NCS: noncoronary sinus; LCA: left coronary artery.
