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Figure 1 Examples of Dyssynchrony and Dyssynergy

(Left) An example of dyssynchrony from a patient with depressed ejection fraction. Lateral systolic velocity (blue) occurs 76 ms after septal systolic velocity (yellow). (Right) An example of dyssynergy. Notice the simultaneous occurrence of peak systolic velocities in these 2 opposite walls, despite a notable difference in the velocity amplitude. In both panels, yellow arrows indicate time intervals to peak systolic velocities.