Chronic total occlusion: To treat or not to treat

Table 1 Chronic total occlusion prevalence, location and treatment applied in different studies n (%)

Ref.	Type of study	Population	CTO prevalence	CTO location			Medical treatment	PCI	CABG
				RCA	LAD	LCA
Kahn et al[2], 1993	Retrospective	333 Coronary disease (stenoses ≥ 50%)	101 (35)	58%	18%	24%	-	-	-
Christofferson et al[3], 2005	Retrospective	6581 Underwent coronarography because of suspected CD	1612 (25)	49.4%	22%	28.60%	49%	11%	40%
		3087 Coronary disease (stenoses ≥ 70%)	1612 (52)
Srinivas et al[4], 2002	Retrospective	1761 Multivessel disease	545 (31)	-	-	-	-	14.50%	-
Yamamoto et al[5], 2013	Prospective	15263 First revascularization procedure	2491 (19)	44.9%	41.10%	28.50%	-	61.18%	-
Fefer et al[6], 2012	Prospective	14439 Underwent coronariography because of suspected CD	2630 (18.2)	46.9%	19.86%	15.43%	64%	10%	26%
Jeroudi et al[7], 2013	Prospective	1015 Coronary disease (stenoses ≥ 50%)	319 (31.34)	-	-	-	19% (61)	50% (161)	30% (97)

CTO: Chronic total occlusion; RCA: Right coronary artery; LAD: Left anterior descending; LCA: Left circumflex artery; PCI: Percutaneous coronary intervention; CABG: Coronary artery bypass graft.