Image of the month: ‘Hourglass left ventricle’ in mid-ventricular hypertrophic cardiomyopathy

A 69-year-old woman with a past medical history of hypertension presented with dyspnoea. Electrocardiography showed left ventricular (LV) hypertrophy and diffuse T wave abnormality. Echocardiography showed systolic mid-cavity narrowing of LV with turbulent flow (Fig [1][1]a). Coronary angiography