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Effect of pacemaker implantation after transcatheter aortic valve replacement on long- and mid-term mortality

Published:October 19, 2020DOI:https://doi.org/10.1016/j.hrthm.2020.10.013

      Background

      Transcatheter aortic valve replacement (TAVR) has become quite common. Atrioventricular conduction defects remain a frequent complication resulting with permanent pacemaker (PPM) implantation. Past studies showed conflicting results regarding PPM effect on mortality.

      Objective

      The purpose of this study was to assess the influence of PPM implantation on mid- and long-term mortality in a large cohort of patients who underwent TAVR.

      Methods

      Patients undergoing TAVR between 2009 and 2019 were categorized into groups: no PPM implanted (no-PPM), PPM implanted before the procedure (pre-PPM), and PPM implanted postprocedure (post-PPM). All-cause mortality up to 6 years was compared. Subanalyses were performed according to pacing burden. Proportion of patients who had decreased left ventricular ejection fraction within 1 year of the procedure after TAVR was also recorded.

      Results

      A total of 1489 patients were followed. Unadjusted mortality was similar for patients regardless of PPM status within 12 months (P > .187), yet within 72 months, mortality was similar for the post-PPM (P = .257) and higher for pre-PPM (hazard ratio 1.53; P = .002) groups. Analysis adjusted by clinical characteristics did not show any independent long- or mid-term survival effects of PPM (P > .563). Analysis according to pacing burden showed no significant mortality difference (P > .8). Analysis of post-PPM patients with “high” or “near constant” (>40%) pacing burden vs no-PPM patients showed similar mortality for both mid- and long-term mortality (P = .055 and P = .513). Left ventricular ejection fraction decrease within 1 year was more common in both PPM groups, with a higher proportion with higher pacing burden (P < .001).

      Conclusion

      This cohort of consecutive patients undergoing TAVR showed that postprocedure PPM was not associated with increased long-term mortality. This conclusion was not altered by ventricular pacing burden.

      Keywords

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