%0 Journal Article %T Echocardiography Core Laboratory Methodology for TAVR: A Transatlantic Consensus. %A Ren CB %A Tardif D %A Brandenburg HJ %A Roux M %A Mrevlje B %A Geleijnse ML %A Van Mieghem NM %A Spitzer E %A Pibarot P %J JACC Cardiovasc Imaging %V 0 %N 0 %D 2024 Jun 20 %M 38970592 %F 16.051 %R 10.1016/j.jcmg.2024.04.014 %X Inter-echocardiography core laboratory (ECL) harmonization is pivotal to consider data from different ECLs interchangeable. On the basis of the experience of the first trans-Atlantic harmonization of 2 established ECLs in the field of transcatheter aortic valve replacement (TAVR) trials, this review describes the harmonized ECL methodology in analyzing and adjudicating the post-TAVR echocardiographic endpoints according to Valve Academic Research Consortium 3 definitions. This review presents the feasibility and intra- and inter-ECL reproducibility, explains the root cause of potential important inter-ECL variability, and formulates ECL recommendations for optimal post-TAVR echocardiographic image acquisition. The implementation of inter-ECL harmonization may further define the best practice of ECLs and have logistic and regulatory implications for the realization of future TAVR trials.