Differential effect with septal and apical RV pacing on ventricular activation in patients with left bundle branch block assessed by non-invasive electrical imaging and in silico modelling.

[ 10 ], the difference in LVtat between apical pacing and LBBB failed to reach statistical significance (116 ± 27 vs 103 ± 22 ms, p = 0.06); however, the mechanism by which this difference exists can be explained simply by the greater basal to apical length than the left ventricular width; therefore, conduction takes longer from base to apex as opposed to from septal to lateral wall ( Fig. 6 ).

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