Lesion and procedural characteristics
| Simple n=218 | Complex n=228 | P value | |
| LVEF (%) | 57±6 | 56±7 | 0.10 |
| Lesion location | |||
| Left anterior descending artery | 161 (74.2%) | 174 (76.7%) | 0.55 |
| Circumflex artery | 36 (16.6%) | 40 (17.6%) | 0.77 |
| Right coronary artery | 14 (6.5%) | 9 (4.0%) | 0.24 |
| Left main stem | 6 (2.77%) | 3 (1.3%) | 0.28 |
| Calcification visible by angiography | 105 (48.4%) | 99 (43.6%) | 0.31 |
| Proximal tortuosity | 6 (2.8%) | 16 (7.0%) | 0.04 |
| Angulation less than 70 degrees | 107 (49.3%) | 111 (48.9%) | 0.93 |
| Mean lesion length*, mm | |||
| Main vessel | 20.8±9.9 | 19.5±8.9 | 0.15 |
| Side branch | 6.4±4.1 | 7.7±4.9 | <0.0001 |
| Proximal reference diameter*, mm | |||
| Main vessel | 3.5±0.4 | 3.4±0.3 | 0.02 |
| Side branch | 2.9±0.2 | 2.9±0.2 | 0.16 |
| Side branch predilated | 140 (64.2%) | 177 (78.0%) | – |
| Main vessel stented | 238 (99.6) | 238 (100) | 1.00 |
| Side branch stented | 8 (3.7%) | 219 (96.5%) | – |
| Length of stented main vessel segment*, mm | 25.0±9.5 | 24.3±9.6 | 0.34 |
| Length of stented side branch segment*, mm | 13([8:15) | 9(6:13) | – |
| Side branch predilatation or final kissing balloon inflation | 171 (78.4%) | – | – |
| Final kissing balloon inflation | 79 (36.1%) | 208 (91.2%) | – |
| Treatment successful† | 212 (97.7%) | 226 (98.7%) | 0.14 |
| Procedure time, min | 41.8±33.2 | 67.9±27.6 | <0.0001 |
| Fluoroscopy time, min | 13.9±8.8 | 22.8±12.8 | <0.0001 |
| Contrast volume, mL | 187±81 | 231±86 | <0.0001 |
Values are mean±1 SD or n (%).
*By visual estimate.
†Residual stenosis <30%, of main vessel and Thrombolysis In Myocardial Infarction (TIMI) III flow in side branch.
FKBI, final kissing balloon inflation; LVEF, left ventricular ejection fraction.