71-year-old man with triple-vessel disease. Time curves of circumferential strain (C-strain) on an ischemic anteroseptal segment. The x-axis indicates time frames (20 frame/cycle), and the y-axis indicates the C-strain value (%). Dotted line indicates the end-systolic frame. In the ischemic myocardium, the time curves of C-strain shows slow slopes and small peaks at end-systole. Subendocardial C-strain becomes similar to epicardial C-strain. ■: subendocardial C-strain, ○: epicardial C-strain.