To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video Video 3 Apical four-chamber view demonstrating trivial mitral regurgitation on colour Doppler imaging (arrows) after restoration of sinus rhythm. View Video 3 at http://movie-usa.glencoesoftware.com/video/10.1530/ERP-19-0007/video-3. Severe mitral regurgitation due to atrial tachyarrhythmia: cure by DC cardioversion Jack Parnell, Mehak Tahir, and Benoy N Shah 2019. 6:I1-I2 DOI: 10.1530/ERP-19-0007 Download Original Video