Table 2. Endocardial and epicardial left- and right-ventricular breakthroughs during different pacing modes.

	RV endo [ms]	RV epi [ms]	LV endo [ms]	LV epi [ms]	RV septal [ms]	LV septal [ms]
control native	12±13‡	19±13‡	17±10#‡	24±16#‡	20±10‡	16±10#‡
control RV	0±1‡	14±6‡	41±13‡	36±16‡	12±11‡	34±11‡
LBBB native	7±10§	10±8†	46±19#†	49±16#†	17±12†	36±13#
LBBB RV	0±0*§	15±6*	50±18*	51±17*	16±6*	37±10
LBBB biV	16±13*	28±12*†	17±7*†	1±2*†	30±11*†	40±11

(Native, no stimulation; RV, right ventricular pacing; biV, biventricular pacing; §,*,†,‡,# indicate a p-value <0.05).