Fig. 3.

Approaches to assess regional intraventricular dyssynchrony. Four of the most often applied measurements of regional dyssynchrony are displayed. Asterisks indicate peak measurements. Panel a septal-to-posterior wall motion delay by parasternal M-Mode, panel b three-dimensional dyssynchrony index derived from three-dimensional echocardiography, panel c tissue Doppler derived septal-to-lateral peak systolic velocity delay, panel d speckle-tracking derived anteroseptal-to-posterior peak radial strain delay