To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video Video 1 At initial presentation: parasternal long axis with colour. View Video 1 at http://movie-usa.glencoesoftware.com/video/10.1530/ERP-18-0072/video-1. Routine orthostatic LVOT gradient assessment in patients with basal septal hypertrophy and LVOT flow acceleration at rest: please stand up H C Sinclair, P Russhard, C H Critoph, and C D Steadman 2019. 6:K1-K6 DOI: 10.1530/ERP-18-0072 Download Original Video