Table 1.

Study characteristics

Author	Year	Events	Stress	Patients (n)	Mean age (years)	Follow-up (years)	Males (%)	LBBB / Pacing	SPECT result	CD		CD and AMI		CD and AMI free survival (%)		Annual CD rate (%/year)
									High risk (n, %)	Low risk	High risk	Low risk	High risk	Low risk	High risk	Low risk	High risk
Lapeyre	2005	CD, AMI, Revasc.	Ph.	93	74	5.6 ± 2.4	77	Pacing	23, 25%	n.a.	n.a.	10	7	97	63	1.4	6
Lapeyre	2004	CD, AMI, Revasc.	Ex.	108	68	7.1 ± 2.8	66	Pacing	29, 27%	3	8	8	8	93	81	0.3	3.8
Nigam	1998	NCD, CD	Both	96	66	3.4 ± 2.1	55	LBBB	26, 27%	4	8	n.a.	n.a.	90	65	1.8	10
Nallamothu	1997	CD, AMI, Revasc., HTx	Both	293	58	2.8 ± 2.3	59	LBBB	167, 57%	n.a.	n.a.	11	47	91	72	n.a.	n.a.
Gil	1998	CD, AMI, Revasc.	Ph.	69	59	2.8	48	LBBB	n.a.	0	n.a.	0	n.a.	100	n.a.	0	n.a.
Wagdy	1998	CD, AMI, Revasc., NCD, CAG, HTx	Ph.	245	69	3 ± 1.4	51	LBBB	84, 34%	6	20	9	27	93	55	n.a.	n.a.
America	2007	CD, AMI, Revasc.	Ph.	101	65	1.24 (max 2.48)	67	LBBB	101, 100%	n.a.	14	n.a.	15	n.a.	n.a.	n.a.	n.a.
Krishnan	1993	CD, Revasc.	Both	69	68	2 (1.5 2.7)	61	LBBB	n.a.	n.a.	n.a.	n.a.	n.a.	n.a.	n.a.	n.a.	n.a.
Usmani	2009	CD, AMI	Ph.	76	56	24 ± 8 (months)	58	LBBB	24, 32%	1	5	3	8	98	79	1	11
ten Cate	2010	CD, AMI, Revasc.	Ph.	197	69	2.6 ± 1.5	37	Both	96, 49%	2	13	4	17	97	77	0.7	6.4
Total				1347	65	3.2			550, 41%	16	68	45	129

AMI = acute myocardial infarction, CAG = coronary angiography, CD = cardiac death, Ex. = exercise, HTx = heart transplant, LBBB = left bundle branch block, n.a. = not available, NCD = non cardiac death, Ph. = pharmacological, Revasc. = coronary revascularisation, SPECT = single photon emission computed tomography