Selected clinical and procedural characteristics and their association with LBBB following TAVI
| Q1/reference | Q3/risk | OR (95% CI) | P value | |
| Preprocedural QRS duration* (ms) | 92 | 126 | 0.40 (0.18 to 0.87) | 0.01 |
| Preprocedural RBBB | No | Yes | 0.27 (0.08 to 0.92) | 0.04 |
| Aortic root rotation | 2.05 | 19.25 | 1.03 (0.70 to 1.52) | 0.88 |
| Aortic root qualification | Central/counterclockwise | Clockwise | 1.06 (0.53 to 2.12) | 0.86 |
| Aortic root wedging | 37.78 | 47.19 | 0.68 (0.43 to 1.08) | 0.10 |
| Frontal aortic root tilt angle | 42.20 | 53.73 | 0.92 (0.62 to 1.35) | 0.66 |
| Left ventricle to aortic root angle: three-chamber plane | 122.45 | 133.70 | 0.92 (0.60 to 1.42) | 0.71 |
| Membranous septum height | 3.18 | 5.20 | 1.07 (0.72 to 1.58) | 0.75 |
| Membranous septum width | 4.70 | 8.60 | 1.30 (0.82 to 2.06) | 0.27 |
| Membranous septum area | 11.50 | 34.71 | 1.31 (0.82 to 2.11) | 0.26 |
| Inferior distance | 1.50 | 4.40 | 1.04 (0.66 to 1.65) | 0.87 |
| Valve implantation depth | 3.83 | 7.40 | 1.82 (1.14 to 2.88) | 0.01 |
| Δ Inferior distance to implantation depth | −5.06 | −0.59 | 0.64 (0.41 to 1.01) | 0.06 |
| Valve oversizing | 4.23 | 19.55 | 1.24 (0.78 to 1.97) | 0.35 |
| Self/mechanical-expandable versus balloon-expandable valves | Balloon | Self/mechanical | 2.12 (1.07 to 4.20) | 0.03 |
| Valve type | ||||
| Boston Scientific | Edwards | Boston Scientific | 3.53 (1.42 to 8.80) | 0.02 |
| Medtronic | Edwards | Medtronic | 1.70 (0.80 to 3.58) |
OR and 95% CI estimated from logistic regression. OR for a comparison of the IQR (Q3 vs Q1). P value for the Wald test for total model terms.
*Model includes restricted cubic spline term with three knots placed at the 10th, 50th and 90th percentiles.
LBBB, left bundle branch block;Q1, quartile 1 (25th percentile);Q3, quartile 3 (75th percentile);RBBB, right bundle branch block;TAVI, transcatheter aortic valve implantation; Inferior distance, virtual basal ring to muscular ventricular septum height; Δ inferior distance to implantation depth, difference between inferior distance and valve implantation depth.