Table 1

 Three dimensional echocardiography for left ventricular (LV) dyssynchrony analysis

Allows comparison of timing of all LV segments
Regional volumes provide composite of all vectors of motion
Excellent spatial resolution
Quick acquisition and analysis
Systolic dyssynchrony index is simple, intuitive, reproducible, and predictive of cardiac resynchronisation therapy success
Graphical “parametric” display of dyssynchronous segments—guide to LV lead placement