Table 2.

Prediction of wavefront coalition and fusion

Subject	Time for RV BO septum into LV (mean)	Max time: BO from SC area	Mean time: BO from SC area	Distance of slow conduction area from MEA (mm)		Max difference between timing: RV–LV BO	Optimal LV–RV timing difference on VTI
				SC area (mean (range))	Normal EGM (mean (range))
1	70	83.3	75	41 (31–49)	38(9–55)	30	20
3	48	106.7	64	39 (14–53)	31 (23–37)	53.3	40
4	39	62	32	34 (18–51)	42 (18–62)	33	32
5	54.8	84.2	82	43 (16–60)	29 (14–50)	11	20
8	103	80	57.4	42 (20–57)	21 (14–31)	36	40
9	87	92.5	108	45 (12–73)	34 (10–50)	20	20
Mean	66.9	84.7	69.7	41	38	30.6	28.6

All times are in ms.

BO, breakout of depolarisation wavefront from given region; EGM, electrogram; LV, left ventricle; MEA, multielectrade array; RV, right ventricle; SC, slow conduction; VTI, velocity–time integral.