Determinants of percutaneous coronary intervention success in repeat chronic total occlusion procedures following an initial failed attempt

Table 2 Angiographic characteristics

Angiographic characteristics	Overall (n = 64)	Success (n = 41)	Failure (n = 23)	P value
CTO Site				0.0045
LAD	27 (42.2%)	21 (51.5%)	6 (26.1%)
RCA	31 (48.4%)	16 (39.0%)	15 (65.2%)
LCx	6 (9.4%)	4 (9.7%)	2 (8.7%)
Blunt stump	19 (29.7%)	10 (24.3%)	9 (39.1%)	0.34
Tortuous vessel	23 (35.9%)	12 (29.2%)	11 (47.8%)	0.225
Calcified lesion	11 (17.2%)	4 (9.7%)	7 (30.4%)	0.047
Lesion length > 20 mm	49 (93.8%)	30 (73.1%)	19 (82.6%)	0.58
J-CTO Score	2.9 ± 0.92	2.73 ± 0.84	3.2 ± 0.99	0.0063
J-CTO 1	4 (6.25%)	3 (7.3%)	1 (21.4%)	1
J-CTO 2	18 (28.1%)	12 (29.3%)	6 (26.1%)	1
J-CTO 3	22 (34.4%)	19 (46.3%)	3 (39.1%)	0.015
J-CTO 4	20 (31.2%)	7 (17.1%)	13 (56.5%)	0.0028
Rentrop class 3	43 (67.2%)	26 (48.8%)	17 (73.9%)	0.56
Segment
Distal	4 (6.2%)	2 (4.9%)	2 (8.7%)	0.61
Mid	27 (42.2%)	16 (39.0%)	11 (47.8%)	0.67
Proximal	33 (51.6%)	23 (56.1%)	10 (43.5%)	0.47
Segment length	26.95 ± 12.2	25.4 ± 10.3	29.7 ± 14.9	0.23
Presence of proximal disease	15 (23.4%)	9 (21.9%)	6 (26.1%)	0.95

LAD: Left anterior descending; LCx: Left circumflex; RCA: Right coronary artery; CTO: Chronic total occlusions; J-CTO: Japanese chronic total occlusion.