David Messika‐Zeitoun, Pascal Candolfi, Alec Vahanian, Vincent Chan, Ian G. Burwash, Jean‐François Philippon, Jean‐Manuel Toussaint, Patrick Verta, Ted E. Feldman, Bernard Iung, David Glineur, Thierry Mesana, and Maurice Enriquez‐Sarano Originally published 22 Jul 2020 https://doi.org/10.1161/JAHA.120.016086 Journal of the American Heart Association. ;0 Background Although US recent data suggest that mitral regurgitation (MR) is severely undertreated and carries a poor outcom