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Figure 4 Quantification of regional wall motion from real-time three-dimensional echocardiographic data. After semiautomatic segmentation of the left ventricular chamber (upper left), the extent and timing of regional wall motion is analyzed in a 16-segment model (lower left) and in this example expressed as regional ejection fraction over time. There is clear regional dyssynchrony between the inferoseptal and the anterolateral segments during left bundle branch block (LBBB) (lower middle), which improves immediately after initiation of cardiac resynchronization therapy (CRT) (lower right). (Courtesy of A. Franke, University Hospital Aachen, Germany.)
