A 76-year-old woman with no cardiac history was admitted to our hospital for knee joint surgery. The ECG showed negative T wave in leads I, aVL, V3-V6. Transthoracic echocardiography showed diffuse mild hypokinesis and prominent trabeculations of the left side ventricle (Picture 1). Mild aortic regurgitation and mild left atrioventricular regurgitation were also observed. Contrast-enhanced thre...