Fig. 5.

The 2-D nonlinear embedding of one cycle of LV echocardiography images using improved Isomap algorithm (with k = 8 neighbors) in two cases. Left, healthy case (68 fps, 74 bpm, LV ejection fraction = 72 %). Right patient case (42 fps, 86 bpm, LV ejection fraction = 30 %). The seven phases of the cardiac cycle are depicted with different symbols and colors. (First phase: black, second: red, third: yellow, forth: green, fifth: blue, sixth: magenta, seventh: cyan). (The horizontal and vertical axes are dimensionless.)