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Mean improvement in each activation metric with BiV pacing and at the optimal pacing modality (OPM) compared to baseline (underlying rhythm or RVP for those with CHB)—septal implant subgroup. ∗P < .05. BiV = biventricular; BIVAT-90 = time for 90% biventricular activation; BiVDI = biventricular dyssynchrony index; LVAT95 = time for 95% left ventricular activation; LVDI = left ventricular dyssynchrony index; RVAT90 = time for 90% right ventricular activation.
