Relevance of Chronic Total Occlusion for Outcome of Ventricular Tachycardia Ablation in Ischemic Cardiomyopathy

Table 2

Outcome parameters for CTO and non-CTO patients as well as nonrevascularized and revascularized patients.

	All patients	Non-CTO	CTO	value	Non-revascularized	Revascularized	value
	n = 299	n = 108	n = 191		n = 105	n = 86
Ablation data
Ablation of all VTs	210 (70)	79 (73)	131 (66)	0.56	73 (70)	58 (67)	0.53
Ablation of clinical VT	239 (80)	87 (81)	152 (79)	0.83	82 (78)	70 (81)	0.85
No of induced VTs	2 (1, 3)	2 (1, 3)	2 (1, 3)	0.50	2 (1, 3)	2 (1, 3)	0.87
Inducibility post	63 (21)	21 (19)	42 (22)	0.60	22 (21)	20 (23)	0.91
Epicardial approach	8 (3)	6 (6)	2 (1)	0.001	4 (4)	5 (6)	0.21
Epicardial origin	52 (17)	20 (19)	32 (17)	0.75	17 (16)	17 (20)	0.40
Major complication	13 (4)	3 (3)	10 (5)	0.32	6 (6)	5 (5)	0.77
Follow-up
Time to follow-up (days)	557 (149, 1113)	567 (156, 1383)	534 (122, 1055)	0.23	661 (232, 1410)	364 (49, 939)	0.004
Recurrence rate	117 (39)	40 (37)	77 (40)	0.62	32 (31)	45 (52)	0.002
Recurrent VT-CL (ms)	365 (302, 428)	340 (293, 425)	380 (313, 428)	0.26	375 (303, 419)	380 (318, 435)	0.50
Time to recurrence (days)	149 (41, 407)	131 (46, 421)	149 (40, 406)	0.84	211 (63, 503)	94 (29, 337)	0.050
Death in hospital	15 (5)	5 (5)	10 (5)	0.82	4 (4)	5 (6)	0.31
Death at follow-up	34 (11)	5 (5)	29 (15)	0.006	14 (13)	15 (17)	0.17
Reablation during follow-up	51 (17)	21 (19)	30 (16)	0.41	13 (12)	17 (20)	0.16

Values presented as n (%), mean ± SD or median (IQR), chronic total occlusion = CTO; cycle length = CL; ventricular tachycardia = VT.