Imaging characteristics
| Variable | Elevated gradient n=26 | No gradient change n=181 | P value | Total |
| MG echo day 1 post-TAVI, mm Hg | 9.4±4.5 | 12.5±6 | 0.003* | 12.2±6.1 |
| Velocity echo day 1 post-TAVI m/s | 1.9±0.5 | 2.3±0.5 | <0.001* | 2.3±0.5 |
| CT-derived annulus area (pre-TAVI) mm2 | 449±77 | 454±80 | 0.748 | 452±79 |
| CT-derived annulus perimeter (pre-TAVI) mm | 77±7 | 77±8 | 0.716 | 77±8 |
| Major annulus diameter mm | 27±2 | 27±3 | 0.731 | 27±3 |
| Eccentricity index % | 21±4 | 18±6 | 0.019* | 19±6 |
| Sinotubular junction (major) | 29.0±3.6 | 29.6±4.0 | 0.640 | 29.5±3.9 |
| Sinus of Valsalva (major) | 32.4±3.2 | 33.0±4 | 0.449 | 32.9±3.9 |
This table describes and compares preprocedural CT parameters and also the initial immediate postprocedural echo on day 1 post-TAVI between groups: elevated gradient at follow-up versus no elevated gradient and a p value for comparison of the groups using independent t-test (for continuous variables). The entire cohort are also summarised in the ‘Total’ column. CT-derived annulus area and perimeter refer to the aortic valve annulus.
*P<0.05 (statistical significance)
MG, mean gradient; TAVI, transcatheter aortic valve implantation.