Scatter plot shows subendocardial and epicardial circumferential strain (C-strain) in stenotic and non-stenotic segments in patients with coronary artery disease. Horizontal long line represents the mean value and the upper and lower short lines the standard error of the mean. Dotted line represents the best cutoff threshold of C-strain. Subendocardial C-strain was significantly lower for stenotic segment than non-stenotic segment (*p < 0.0001). There was no difference in epicardial C-strain between the two segments.