Table 3.
Procedural Data
| Variables | Overall (n=25) | LAD-Septal-LAD (n=15) | LAD-Septal-LCX (n=10) | p Value |
|---|---|---|---|---|
| Vascular access | 0.350 | |||
| Radial only | 19 (76) | 10 (66.7) | 9 (90) | |
| Femoral + radial | 6 (24) | 5 (33.3) | 1 (10) | |
| Ping-pong technique | 3 (12) | 1 (6.7) | 2 (20) | 0.540 |
| 7 F guiding catheter | 19 (76) | 14 (93) | 5 (50) | 0.020 |
| Primary retrograde approach | 7 (28) | 5 (33.3) | 2 (20) | 0.660 |
| Multiple guidewires for CC tracking | 7 (28) | 5 (33.3) | 2 (20) | 0.660 |
| Microcatheter for CC tracking | 24 (96) | 15 (100) | 9 (90) | 0.610 |
| Corsair | 10 (40) | 8 (53.3) | 2 (20) | |
| Finecross | 12 (48) | 5 (33.3) | 7 (70) | |
| Others | 2 (8) | 2 (13.3) | 0 | |
| Successful microcatheter CC tracking | 24 (96) | 15 (100) | 9 (90) | 0.400 |
| Tip injection | 16 (64) | 9 (60) | 7 (70) | 0.690 |
| IVUS | 12 (50) | 10 (66.7) | 2 (20) | 0.090 |
| Final CTO crossing technique | 23 (92) | 14 (93.3) | 9 (90) | 0.770 |
| Reverse CART | 4 (17.4) | 3 (21.4) | 1 (11.1) | |
| Kissing wires | 8 (34.8) | 5 (35.7) | 3 (33.3) | |
| Retrograde wire crossing | 11 (47.8) | 6 (42.9) | 5 (55.6) | |
| Procedure duration (min) | 127±31 | 129±25 | 124±40 | 0.684 |
| Technical success | 23 (92) | 14 (93.3) | 9 (90) | 0.990 |
| Procedural success | 23 (92) | 14 (93.3) | 9 (90) | 0.990 |
Abbreviations: CC, collateral channel; CTO, chronic total occlusion; IVUS, intravascular ultrasound; LAD, left descending coronary artery; LCX, left circumflex coronary artery; Reverse CART, reverse controlled antegrade and retrograde subintimal tracking.