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

Table 3 Procedural characteristics

Procedural characteristics	Overall (n = 64)	Success (n = 41)	Failure (n = 23)	P value
Planned initial attempt	45 (70.3%)	29 (70.7%)	16 (69.6%)	1
Retrograde approach	9 (14.1%)	6 (14.6%)	3 (13.0%)	1
Contralateral injection	36 (56.3%)	22 (53.6%)	14 (60.9%)	0.76
Parallell wire	16 (25%)	10 (24.3%)	6 (26.1%)	1
Intravascular ultrasound	8 (12.5%)	8 (19.5%)	0 (0%)	0.042
Rotablator	5 (7.8%)	5 (12.2%)	0 (0%)	0.15
Change of operator	39 (60.9%)	27 (65.9%)	12 (52.2%)	0.41
Experienced operator	36 (56.3%)	27 (65.9%)	9 (39.1%)	0.065
Change in guide catheter	11 (17.2%)	7 (17.1%)	4 (17.4%)	1
Change of wire	38 (59.4%)	23 (56.1%)	15 (65.2%)	0.65
Microcatheter use	46 (71.9%)	28 (68.3%)	18 (78.3%)	0.57
Procedure time	127.8 ± 44.3	129.1 ± 51.3	125.3 ± 32.8	0.71
Fluroscopy time	45.44 ± 21	43.3 ± 21.5	49.2 ± 20.0	0.27
Contrast (mL)	337.5 ± 127.5	355.5 ± 127.2	305.4 ± 124.3	0.13