Echocardiography Core Laboratory Methodology for TAVR: A Transatlantic Consensus

Area of Science:

• Cardiology
• Medical Imaging
• Clinical Trials

Background:

• Inter-echocardiography core laboratory (ECL) harmonization is crucial for data consistency in multicenter clinical trials.
• Transcatheter aortic valve replacement (TAVR) trials rely heavily on echocardiographic endpoints, necessitating standardized analysis.
• Variability between ECLs can impact trial outcomes and regulatory approval.

Purpose of the Study:

• To describe a harmonized methodology for analyzing post-TAVR echocardiographic endpoints across different ECLs.
• To assess the feasibility and reproducibility of inter-ECL harmonization.
• To identify sources of inter-ECL variability and provide recommendations for optimal image acquisition and analysis.

Main Methods:

• Review of the first trans-Atlantic harmonization experience between two established ECLs.
• Application of Valve Academic Research Consortium 3 (VARC-3) definitions for echocardiographic endpoints.
• Analysis of intra- and inter-ECL reproducibility.
• Formulation of recommendations based on identified variability.

Main Results:

• Demonstrated feasibility of inter-ECL harmonization for TAVR echocardiographic endpoints.
• Assessed intra- and inter-ECL reproducibility, highlighting areas of potential variability.
• Identified root causes contributing to inter-ECL variability in echocardiographic analysis.
• Provided specific recommendations for improving echocardiographic image acquisition and adjudication.

Conclusions:

• Inter-ECL harmonization is achievable and essential for reliable TAVR trial data.
• Standardized methodologies and clear recommendations can mitigate inter-ECL variability.
• Successful harmonization has implications for best practices, logistics, and regulatory aspects of future TAVR trials.