Results of quantitative coronary angiography
| Conventional angioplasty (n=92) | Direct stenting (n=89) | p Value | |
|---|---|---|---|
| Data are mean (SD). | |||
| Balloon size (mm) | 3.32 (0.30) | 3.39 (0.27) | 0.26 |
| Balloon:artery ratio | 1.02 (0.09) | 1.05 (0.09) | 0.25 |
| Maximal balloon pressure (atm) | 11.6 (3.4) | 13.3 (1.6) | 0.007 |
| Number of stents | 0.6 (0.5) | 1.0 (0.0) | <0.001 |
| Length of stents (mm) | 17.8 (3.6) | 15.9 (1.7) | 0.01 |
| Reference diameter (mm) | |||
| Before | 3.18 (0.42) | 3.22 (0.37) | 0.69 |
| After | 3.18 (0.40) | 3.17 (0.33) | 0.91 |
| At follow up | 3.15 (0.39) | 3.16 (0.40) | 0.92 |
| Minimal luminal diameter (mm) | |||
| Before | 0.52 (0.26) | 0.62 (0.35) | 0.14 |
| After | 2.95 (0.60) | 3.11 (0.54) | 0.24 |
| At follow up | 1.87 (0.93) | 2.56 (0.86) | 0.002 |
| Stenosis (%) | |||
| Before | 83.4 (8.4) | 80.5 (10.0) | 0.15 |
| After | 8.9 (10.0) | 4.8 (9.4) | 0.06 |
| At follow up | 41.0 (28.1) | 21.9 (22.8) | 0.003 |
| Gain (mm) | 2.39 (0.67) | 2.48 (0.64) | 0.55 |
| Loss (mm) | 1.19 (0.87) | 0.62 (0.69) | 0.004 |
| Net gain (mm) | 1.41 (0.93) | 1.99 (0.92) | 0.01 |
| Diameter stenosis >50% at follow up | 28 (30.4%) | 14 (15.7%) | 0.019 |