Table 6. Angiographic Findings and PCI Results among 342 Patients.
| Variables | Group 1*(n = 43) | Group 2*(n = 183) | Group 3*(n = 75) | Group 4*(n = 8) | p-value |
| Multiple vessel disease (%) | 79.1% (34) | 79.8% (146) | 81.3% (61) | 100% (8) | 0.553 |
| Pre-PCI LM stenosis (%) | 64.1±16.2a | 67.5±12.3a | 72.5±13.2b | 73.9±5.1b | 0.002 |
| LM obstructive level | |||||
| Ostial/proximal level (%) | 25.6% (11) | 23.5% (43) | 29.3% (22) | 12.5% (1) | 0.581 |
| Middle level (%) | 4.7% (2) | 18% (33) | 16% (12) | 37.5% (3) | 0.156 |
| Distal/bifurcation level (%) | 69.7% (30) | 58.5% (107) | 54.7% (41) | 50% (4) | 0.785 |
| Pre-MLD (mm) | 0.26±0.44 | 0.23±0.42 | 0.29±0.43 | 0.13±0.35 | 0.652 |
| Pre-RLD (mm) | 3.38±0.67 | 3.47±0.76 | 3.47±0.46 | 3.41±0.73 | 0.870 |
| Pre-PCI TIMI flow | 0.201 | ||||
| ≥TIMI-2 flow | 4.7% (2) | 2.2% (4) | 6.7% (5) | 12.5% (1) | |
| ≤TIMI-1 flow | 95.3% (41) | 97.8% (179) | 93.3% (70) | 87.5% (7) | |
| Stent position | |||||
| LM shaft (%) | 14% (6) | 15.3% (28) | 16% (12) | 0% (0) | 0.665 |
| LM-LAD (%) | 58.1% (25) | 54.1% (99) | 53.3% (40) | 62.5% (5) | 0.922 |
| LM-LCX (%) | 7% (3) | 7.7% (14) | 4% (3) | 0% (0) | 0.675 |
| LM-LAD-LCX (%) | 20.9% (9) | 23% (42) | 26.7% (20) | 37.5% (3) | 0.653 |
| Post-PCI LM stenosis (%) | 2.95±0.21 | 2.95±0.33 | 2.89±0.42 | 2.87±0.35 | 0.539 |
| Post-PCI MLD (mm) | 3.39±0.59 | 3.39±0.61 | 3.77±0.67 | 3.27±0.77 | 0.387 |
| Post-PCI RLD (mm) | 3.38±0.58 | 3.48±0.60 | 3.91±0.64 | 3.49±0.44 | 0.863 |
| Post-PCI TIMI-3 flow | 100% (43) | 100% (183) | 100% (75) | 100% (0) | 1 |
| Procedural success (%) | 100% (43) | 100% (183) | 100% (75) | 100% (8) | 1 |
| Type of stent implantation | 0.021 | ||||
| Drug eluting stent | 81.4% (35)a | 91.8% (168)b | 80% (60)a | 100% (8)a,b | |
| Bare metal stenting | 18.6% (8)a | 8.2% (15)b | 20% (15)a | 0% (0)a,b | |
| Post stent dilatation (%) | 100.0% (43) | 100.0% (183) | 100.0% (75) | 100% (8) | 1.0 |
| IVUS examination (%) | 67.4% (29)a | 73.8% (135)a | 49.3% (37)b | 75% (6)a,b | 0.002 |
| No. PCI vessel (mean ± SD) | 2.67±0.71 | 2.62±0.66 | 2.53±0.81 | 2.50±0.53 | 0.671 |
| No. of stenting (mean ± SD) | 2.34±1.15 | 2.32±1.11 | 2.40±1.01 | 3.12±0.76 | 0.252 |
Data are expressed as % (n) or mean ± SD.
*Group 1 = angina pectoris, Group 2 = unstable angina, Group 3 = non ST-segment elevation myocardial infarction, Group 4 = post-ST-segment elevation myocardial infarction angina.
PCI = percutaneous coronary intervention; LM = left main; MLD = minimal lumen diameter; RLD = reference lumen diameter; TIMI = thrombolisis in myocardial infarction; LAD = left anterior descending artery; LCX = left circumflex.
IVUS = intra-vascular ultra-sound.
Letters (a,b) indicate significant difference (at 0.05 level) by Bonferroni multiple-comparison post hoc test.