Predictors of permanent pacemaker implantation after ACURATE neo transcatheter heart valve implantation.

BACKGROUND: Rates of permanent pacemaker implantation (PPI) have been low using the self-expanding ACURATE neo device, but data regarding risk factors of PPI for this specific device are scarce.

METHODS: The study cohort consisted of patients (n = 1000) with severe aortic stenosis undergoing transfemoral TAVI using the ACURATE neo prosthesis in our center between May 2012 and December 2019. For the present analysis, we excluded patients with previous permanent pacemaker (n = 110), high-grade AV block prior to TAVI (n = 3), and patients requiring conversion to surgical valve replacement (n = 4) or the implantation of a second THV as valve-in-valve (n = 15). Preexisting conduction abnormalities were determined, and the implantation depth of the prosthesis was measured on final angiography. Differences across quartiles based on the original consecutive cohort were analyzed with respect to implantation depth and PPI rate. Predictors of PPI were identified using logistic regression.

RESULTS: The PPI rate was 10%. Pre-existing AV block I°, right bundle branch block, and the implantation depth were independent predictors of PPI. Across quartiles, the implantation depth differed significantly with lowest values in the last quartile, whereas differences of PPI rates across quartiles were not statistically significant, but showed a notable decrease in the last quartile CONCLUSION: : Pre-existing RBBB, AV block I°, and low implantation depth were independent predictors of PPI following TAVI using the ACURATE neo device. Instead of deliberately aiming at a high position, avoidance of a low implantation depth may represent a reasonable compromise to reduce the rate of PPI without increasing the risk of malpositioning. This article is protected by copyright. All rights reserved.