Electrocardiographic imaging of patients with heart failure with left bundle branch block and response to cardiac resynchronization therapy.


BACKGROUND Cardiac resynchronization therapy (CRT) for patients with left bundle branch block (LBBB) and left ventricular (LV) dysfunction has variable responses. We hypothesized that conduction delays in intrinsic rhythm and responses to pacing may be influenced by electrophysiologic substrate. To determine this, we used electrocardiographic imaging (ECGI… (More)


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