TABLE 3.

Steps to Plan BASILICA on a Computed Tomographic Scan

Step	Figure
1. Define the exact annular plane.	Figure 1
2. Measure coronary artery heights, STJ height, and sinus of Valsalva diameters.	Online Figure 1
3. Do leaflet tips extend beyond coronary ostia or STJ?	Online Figure 2
4. Select the outer diameter(s) of the intended TAVR device.	Figure 2
5. Simulate a “virtual valve” implantation using a simple cylinder to model the TAVR implant. Position it at the annular center, and rotate as needed to conform to bioprosthetic struts.	Figure 3
6. Measure VTC distances using the cylinder model. Confirm using simultaneous multiplanar reconstructions (short and long axes).	Figure 4
7. Measure VTSTJ distances and depict using simultaneous multiplanar reconstructions (short and long axes).	Figure 4
8. Assess target leaflet calcification.	Online Figure 3
9. Determine BASIlICA projection angles. Opposing annular markers overlap in side projections; annular markers are evenly spaced in en face projections.	Figure 5
10. Confounders: implantation characteristics and TAVR device.	Figure 6
11. Confounders: SAVR.	Online Figure 4
12. Confounders: anatomic.	Online Figure 5

SAVR = surgical aortic valve replacement; STJ = sinotubular junction; VTC = virtual valve-to-coronary; VTSTJ = virtual valve-to-sinus of Valsalva; other abbreviations as in Table 1.