Conduction Abnormalities After Transcatheter Aortic Valve Replacement: Comprehensive Review of Current Literature,...

Area of Science:

• Cardiology
• Interventional Cardiology
• Cardiac Electrophysiology

Background:

• Transcatheter aortic valve replacement (TAVR) is a less invasive alternative to surgical aortic valve replacement (SAVR) for severe aortic stenosis.
• Initially for high-risk patients, TAVR is now suitable for low-risk individuals, showing widespread adoption and positive results.
• Despite TAVR's benefits, conduction disturbances like new-onset left bundle branch block (LBBB) and high-grade atrioventricular (AV) block, potentially requiring permanent pacemaker (PPM) implantation, are significant challenges.

Purpose of the Study:

• To explore the anatomical and physiological relationship between the aortic valve and the cardiac conduction system.
• To review pre-procedural risk stratification and monitoring protocols for TAVR-related conduction disturbances.
• To discuss emerging strategies for mitigating these complications and improving procedural safety and long-term outcomes.

Main Methods:

• Literature review focusing on the structural and physiological aspects of the aortic valve and cardiac conduction system.
• Analysis of factors influencing conduction disturbances post-TAVR, including valve design, implantation depth, and patient anatomy.
• Examination of current and novel approaches to risk stratification, monitoring, and complication management.

Main Results:

• The proximity of the aortic valve to the cardiac conduction system is a key factor in TAVR-induced conduction disturbances.
• Patient-specific anatomy, valve characteristics, and implantation technique significantly impact the risk of LBBB and AV block.
• Effective risk stratification and tailored monitoring protocols are crucial for managing potential complications.

Conclusions:

• Understanding the intricate relationship between the aortic valve and conduction system is vital for TAVR success.
• Proactive strategies in risk assessment, implantation, and monitoring can minimize the incidence and impact of conduction disturbances.
• Further research into novel techniques and devices may further reduce the need for permanent pacemakers after TAVR, enhancing patient outcomes.