Apical 4-chamber and parasternal long axis two-dimensional transthoracic echocardiography showing sparkling pattern of myocardium and concentric biventricular wall thickening, moderately reduced LV ejection fraction, mildly reduced right ventricular function, enlarged and thickened atria, and a small pericardial effusion. Used with permission of Mayo Foundation for Medical Education and Research. View Video 1 at http://movie-usa.glencoesoftware.com/video/10.1530/ERP-17-0021/video-1.