Figure 14From: Echo-driven V-V optimization determines clinical improvement in non responders to cardiac resynchronization treatmentStrain images obtained in apical 4 views with an AV delay of 220 ms and LV pre-excitation of 20 ms (A), AV delay of 220 ms and VV delay of 0 ms (B) and AV delay of 220 ms and RV pre-excitation of 20 ms (C). Note improved strain in the interventricular septum, LV lateral wall and right ventricular free wall during RV pre-excitation.Back to article page