Figure 9From: Echo-driven V-V optimization determines clinical improvement in non responders to cardiac resynchronization treatmentColor Doppler in 2 chamber view showing mitral regurgitation at baseline with VV delay of 0 ms (A) and with LV pre-excitation of 40 ms (B). A marked reduction in severity of mitral regurgitation (moderate MR decreasing to trace MR) is shown during LV pre-excitation.Back to article page