Click on image to view larger version.

Figure 2 Comparison of Regional and Global Strain in Failing Hearts With RBBB and LBBB

Time to peak strain as a percentage of R-R interval for (A) RBBB + heart failure; (B) LBBB + heart failure; and (C) the standard deviation of time to peak strain for RBBB + heart failure and LBBB + heart failure. (D) Examples of mechanical activation delay maps for both RBBB and LBBB (see text for details). Color bar: blue = early activation; red = late activation. Data expressed as mean ± standard error of the mean. (A and B) *p < 0.001 as compared with septum; p < 0.030 as compared with septum; p < 0.001 as compared with lateral wall; p = 0.535 as compared with lateral wall. (C) *p < 0.001 compared with RBBB-heart failure. Ant. = anterior; CURE = circumferential uniformity ratio estimate; Lat. = lateral; Post. = posterior; Sept. = septal; other abbreviations as in Figure 1.