Figure 6.

Improvement in BiVAT-90 at varying AV delays (AVDs) using synchronous LV-only pacing compared to baseline, with example ECGi-derived lead V₁ equivalent electrograms (right panels). BiVAT-90 improvement using BiV pacing is demonstrated with the dashed line. A: Patient 2—septal implant. B: Patient 8—lateral implant. AV, atrioventricular; BiV = biventricular; BIVAT-90 = time for 90% biventricular activation; BiVDI = biventricular dyssynchrony index; ECGi, electrocardiographic imaging; LV, left ventricular; LVAT95 = time for 95% left ventricular activation; LVDI = left ventricular dyssynchrony index; RVAT90 = time for 90% right ventricular activation.