Redo-Transcatheter Aortic Valve Replacement: Current Evidence and Procedural Considerations

Area of Science:

• Cardiovascular Medicine
• Interventional Cardiology
• Medical Imaging

Background:

• Severe aortic stenosis (AS) management has been transformed by transcatheter aortic valve replacement (TAVR).
• Expanding TAVR indications to low-surgical-risk patients raises concerns about long-term transcatheter heart valve (THV) durability.
• Redo-TAVR (TAVR-in-TAVR) is emerging as a feasible option for valve failure.

Purpose of the Study:

• To review the feasibility and outcomes of redo-TAVR procedures.
• To highlight the critical role of pre-procedure planning in redo-TAVR.
• To emphasize the importance of understanding native aortic valve anatomy and index THV characteristics.

Main Methods:

• Review of observational studies and registries on redo-TAVR.
• Emphasis on the utilization of cardiac computed tomography angiography (CTA) for procedural planning.
• Assessment of factors influencing technical and procedural success in redo-TAVR.

Main Results:

• Redo-TAVR is technically feasible with favorable short-term outcomes reported in current literature.
• Cardiac CTA is crucial for selecting appropriate valves and planning procedures, including risk assessment for coronary occlusion.
• Understanding patient-specific anatomy and prior valve characteristics is key for successful redo-TAVR.

Conclusions:

• Redo-TAVR is a viable option for managing failing THVs, particularly in the context of expanding TAVR use.
• Accurate pre-procedural assessment using CTA is essential for optimizing outcomes and mitigating risks.
• Further evidence from prospective registries is needed to fully elucidate long-term clinical and hemodynamic results of redo-TAVR.