To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video Video 5 Example of reduction in GLS to exercise in a patient with mitral regurgitation and LVEF >60%. View Video 5 at http://movie-usa.glencoesoftware.com/video/10.1530/ERP-16-0019/video-5. Timing surgery in mitral regurgitation: defining risk and optimising intervention using stress echocardiography Boyang Liu, Nicola C Edwards, Simon Ray, and Richard P Steeds 2016. 3:R45-R55 DOI: 10.1530/ERP-16-0019 Download Original Video