Moderate gradient with disproportional dyspnoea: multimodality imaging of funnel-shaped subaortic membrane

A 47-year-old man without medical history presented with new onset angina and progressive excertional dyspnoea, New York Heart Association class III. A crescendo murmur corresponded to systolic turbulent flow in the left ventricular outflow tract (LVOT), coinciding with a thickened sharp-edged basal septum of 14 mm with ring-like structure on transthoracic …