TABLE II.

Outcome fo Retrograde Approach Both Period

N (retro/total)	04′–07′ 67/515	08′–10′ 214/734	P-value <0.001
Antegrade success	431/480 (89.8%)	454/499 (91.0%)	n.s
Procedural success	41 (61.1%)	153 (71.4%)	n.s
Guidewire success	47 (70.1%)	177 (82.7)	n.s
Strategic variables
Retrograde wiring	26 (38.8%)	123 (57.4%)	0.008
Kissing wire technique	33 (49.2%)	93 (43.4%)	0.41
Long shaft OTW balloon	16 (23.8%)	41 (19.2%)	0.4
Corsair catheter	0 (0%)	83 (38.7%)	<0.001
CART	12 (17.9%)	10 (4.7%)	<0.001
Reverse-CART	0 (0%)	22 (10.2%)	0.006
Complication
CTO perforation	0 (0%)	5 (2.3%)	n.s
Channel perforation	3 (4.5%)	2 (0.9%)	n.s
Channel dissection	1 (1.5%)	5 (2.3%)	n.s
Donor vessel occlusion	0 (0%)	3 (1.4%)	n.s