To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video Video 4 Transthoracic four-chamber view showing the leaflets of a bileaflet mechanical tricuspid valve stuck in the half-open, half-closed position. View Video 4 at http://movie-usa.glencoesoftware.com/video/10.1530/ERP-16-0032/video-4. The echocardiography of replacement heart valves John B Chambers 2016. 3:R35-R43 DOI: 10.1530/ERP-16-0032 Download Original Video