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Figure 8 Parametric polar-map displays (lower left and lower right panels) of left ventricular dyssynchrony of the real-time three-dimensional images; blue indicates early activation, red indicates late activation. Left ventricular dyssynchrony is present before cardiac resynchronization therapy (CRT) in the anteroseptal region (red, lower left panel); almost complete resynchronization has occurred after CRT, with disappearance of "red" regions (lower right).