Membranous septum length as predictor for permanent pacemaker implantation after TAVI

Abstract Background High-degree atrioventricular (AV) block and permanent pacemaker (PPM) implantation represent major complications after transcatheter aortic valve (TAVI). Extension of indication for TAVI towards subjects with lower surgical risk requires to reduce the likelihood requirement implantation. Data on role membranous septum length as potential predictor AV are scarce. Purpose We examined need PPM in a large cohort consecutive TAVI. Methods In 1365 patients without prior who underwent transfemoral TAVI, clinical procedural characteristics were assessed systematically. Based cardiac computed tomography performed was measured orthogonal anulus plane (see figure). Results Median age 81 (IQR 7) years, 50% male. Logistic euroSCORE 12.8 15.7), STS score 3 (2.7). 9,8% had pre-interventional complete right bundle branch (RBBB). 71% received balloon-expandable, 29% self-expandable valve. n=153 (11.2%), necessary due high-degree block. 2.9 mm 2.5mm) versus 4.3 3.2 mm) did not (p=0.061). univariate regression analysis, RBBB (p<0.001, OR 7.8), prosthesis (p=0002, 1.7) (p=0.027, 0.9 per 1 identified significant predictors multivariate all parameters remained significant, including (p=0.009, mm). Conclusion patients, we able confirm independent predictive value length, addition or prosthesis, regarding occurrence post-procedural The results may contribute improved stratification Funding Acknowledgement Type funding sources: None.