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Published on: August 8, 2025
Analysis of Conduction Abnormalities and Permanent Pacemaker Implantation After Transcatheter Aortic Valve
Sudhakar Subramani1, Lovkesh Arora1, Sundar Krishnan1
1Department of Anesthesia, University of Iowa Hospitals and Clinics, Iowa City, IA.
Insights
Transcatheter aortic valve replacement (TAVR) is common, but conduction abnormalities (CAs) like pacemaker implantation remain frequent. Newer valves improve safety but haven't reduced CA rates, necessitating ongoing review.
Area of Science:
- Cardiology
- Interventional Cardiology
- Cardiac Surgery
Background:
- Transcatheter aortic valve replacement (TAVR) is a primary treatment for aortic stenosis.
- Initial TAVR trials noted increased conduction abnormalities (CAs), including permanent pacemaker implantation.
- The incidence of CAs post-TAVR has not decreased despite technological advancements.
Purpose of the Study:
- To review the incidence, course, risk factors, mortality, and rehospitalization associated with CAs after TAVR.
- To assess the impact of newer-generation TAVR valves on CA rates.
- To highlight the importance of understanding CAs in the growing TAVR population, including low-risk patients.
Main Methods:
- Review of existing literature and clinical trial data on TAVR and conduction abnormalities.
- Analysis of incidence rates, patient outcomes, and risk factors.
- Comparison of CA rates between different TAVR valve generations.
Main Results:
- Conduction abnormalities (CAs), such as left bundle branch block and permanent pacemaker implantation, remain a significant concern after TAVR.
- Despite improved safety profiles of newer TAVR valves, a clinically significant reduction in CA incidence has not been observed.
- The increasing volume of TAVR procedures necessitates a thorough understanding of CA-related outcomes.
Conclusions:
- Conduction abnormalities and permanent pacemaker implantation are persistent complications following TAVR.
- Further research and monitoring are crucial to mitigate the risks and improve outcomes for patients undergoing TAVR.
- Strategies to reduce CA incidence post-TAVR require further investigation and development.
Abstract:
Over the last decade, transcatheter aortic valve replacement (TAVR) has emerged as the recommended approach for patients with high and intermediate risk for surgical aortic valve replacement. Even though initial trials demonstrated a higher incidence of conduction abnormalities (CAs), such as left bundle branch block, atrial fibrillation, and permanent pacemaker implantation with TAVR, the incidence of CAs has not decreased. With an increasing number of patients expected to undergo TAVR in the coming decades, even those at low risk for surgical aortic valve replacement, it is important to review the incidence, course, risk factors, mortality, and rehospitalization associated with CAs and permanent pacemaker implantation after TAVR. The newer-generation valves have demonstrated an improved safety profile, but have failed to demonstrate a clinically significant reduction in the incidence of CAs.
