Comparison of optimal and worst LVPCs - Individual results in increment in mean %ΔLV +dP/dt_max (±95% confidence interval) in all patients in the optimal (white) and worst (grey) pacing configuration (p<0.0001 for all intraindividual differences).

<p>The red line indicates a 10% increase in LV +dP/dt_max, which has been proposed as a cut-off value to separate responders from non-responders (20). By this definition, individually tailoring the optimal pacing configurations in 4 patients (marked #) transformed non-responders into responders.</p

Averaged results over all patients - Box plots of %ΔLV +dP/dt_max, of all LVPCs, averaged over all 16 patients (5–95% percentile).

<p>RV stimulation consistently produced the least increase in LV +dP/dt_max. No differences were found between LVPCs with the same cathode.</p

Patient characteristics.

<p>LBBB: left bundle branch block, LV EF: left-ventricular ejection fraction, LVEDD: left ventricular end-diastolic diameter, LVESD: left ventricular end-systolic diameter.</p

Study flow chart – Distribution of the tested LVPCs.

<p>Study flow chart – Distribution of the tested LVPCs.</p