Heartbeat: not all patients with primary mitral regurgitation are the sameOtto, Catherine MAuthor information1Division of Cardiology, University of Washington, Seattle, Washington, USA,Correspondence to Professor Catherine M Otto, Division of Cardiology, University of Washington, Seattle, WA 98195, USA; e-mail; [email protected]Heart 109(4):p 245-247, February 2023. | DOI: 10.1136/heartjnl-2023-322427Copyright © 2023 BMJ Publishing Group Ltd and the British Cardiac Society