Association of electrocardiographic markers with myocardial fibrosis as assessed by cardiac magnetic resonance in different clinical settings

Table 1 Baseline characteristics of the included studies

Ref.	Setting	Country of origin	Multicenter	n	Enrolment period	Mean age	Male (%)	LVEF (%)
Oebel et al[25], 2017	PVCs ablation	Germany	No	101	2015-2016	57	59	46
Sakamoto et al[24], 2015	VT/VF	Japan	No	34	-	60	71	45
Piers et al[26], 2016	NICM	Netherlands	No	40	2011-	57	83	30
Becker et al[27], 2020	DCM	Netherlands	No	165	2016-2018	59	62	36
Cho et al[29], 2017	Duchenne muscular dystrophy	Korea	No	37	-	16	-	55
Cardona et al[28], 2019	Myotonic dystrophy 1	United States	No	52	2012-2017	41	38	60
Nadour et al[30], 2014	MI	United States	No	235	2006-2009	62	82	33
Chew et al[31], 2018	MI	Canada	No	705	2011-2014	64	84	40
Ciuffo et al[32], 2020	AF	United States	No	152	2010-2015	60	76	57
Ferrero et al[33], 2020	Myocarditis	Italy	Yes	80	2008-2019	34	82	55
Fischer et al[34], 2020	Myocarditis	Switzerland	No	587	2002-2015	48	59	48
Inoue et al[35], 2017	General population	United States	Yes	1669	2000 - 2002	67	50	62
De Lazzari et al[37], 2018	AC	Italy	No	79	2006-2016	33	60	58
Mewton et al[38], 2016	HFpEF	United States	No	77	2009-2010	60	68	60
Sobue et al[39], 2015	Sarcoidosis	Japan	No	59	2006-2010		29	51
Wieslander et al[36], 2015	General population	United States	No	193	2011-2013	63	66	49
Wieslander et al[40], 2018	LBBB	United States	Yes	325	-	63	52	36
Bi et al[9], 2020	HCM	China	No	69	2015-2020	46	62	65
Chen et al[10], 2014	HCM	China	No	118	2005-2012	46	72	72
Chen et al[11], 2020	HCM	China	No	135	2012-2016	51	51	62
Riza-Demir et al [12], 2019	HCM	Turkey	No	74	2016-2018	51	65	66
Dohy et al[13], 2020	HCM	Hungary	No	181	-	49	57	63
Fronza et al[14], 2016	HCM	Italy	No	88	2004-2014	42	74	62
Grall et al[15], 2014	HCM	France	No	42	2008-2012	47	72	62
Guerrier et al[16], 2016	Pediatric HCM	United States	No	37	2006-2014	16	89	69
Kawasaki et al[17], 2015	HCM	Japan	No	60	2010-2013	66	76	64
Konno et al[18], 2015	HCM	Japan	No	108	2008 - 2014	62	65	-
Matsuki et al[19], 2020	HCM	Japan	No	41	-	62	76	65
Park et al[20], 2018	HCM	Korea	No	88	-	57	74	6
Sakamoto et al[21], 2015	HCM	Japan	No	42	2004-2014	59	79	58
Suwa et al[22], 2014	HCM	Japan	Yes	50	2004 - 2012	-	-	-
Tangwiwat et al[23], 2019	HCM	Thailand	No	144	2005 - 2015	66	60	73

LVEF: Left ventricular ejection fraction; PVC: Premature ventricular complex; VT/VF: Ventricular tachycardia/ fibrillation; NICM: Non-ischemic cardiomyopathy; DCM: Dilated cardiomyopathy; MI: Myocardial infarction; AF: Atrial fibrillation; AC: Arrhythmogenic cardiomyopathy; HFpEF: Heart failure with preserved ejection fraction; LBBB: Left bundle branch block; HCM: Hypertrophic cardiomyopathy.