Table 1.

ECG findings and CMR in patients with RBBB IA PVCs

Variable	RBBB IA		P
	LGE +	LGE −
	n = 4	n = 35
QRS, msec	186.3 ± 24.9	144.2 ± 16.5	0.0001
QRS notching in one or more leads, n (%)	4 (100)	24 (68.6)	0.461
QRS ≥ 120 msec in lead I, n (%)	4 (100)	15 (42.9)	0.101
Maximal QRS duration >160 msec, n (%)	3 (75)	13 (37.1)	0.357
Intrinsicoid deflection >80 msec, n (%)	2 (50)	16 (45.7)	0.999
Initial slurring (pseudo-delta), n (%)	2 (50)	15 (42.8)	0.999

Values are mean ± SD unless specified.

Abbreviations: CMR, cardiac magnetic resonance; n, number of patients; LGE, late gadolinium enhancement; PVCs, premature ventricular complexes; RBBB, right bundle branch block.