Procedural characteristics of patients presenting with ST-elevation myocardial infarction comparing those with no reflow to those without
| No reflow | P value | ||
| No (n=149) | Yes (n=24) | ||
| Heparin dose (units) | 8054±2347 | 6818±2260 | 0.022 |
| Activated clotting time (s) | 290±82 | 304±79 | 0.549 |
| Glycoprotein IIb/IIIa inhibitor use | 33 (22) | 6 (25) | 0.784 |
| Predilation performed | 103 (70) | 24 (100) | 0.002 |
| Predilation balloon inflation pressure (atm) | 12±3 | 14±4 | 0.047 |
| Predilation balloon diameter (mm) | 2.5±0.5 | 2.5±0.4 | 0.848 |
| Stent inserted | 140 (96) | 24 (100) | 0.312 |
| Stent inflation pressure (atm) | 15±2 | 15±3 | 0.988 |
| Stent diameter (mm) | 3.3±0.5 | 3.3±0.7 | 0.527 |
| Postdilation performed | 55 (38) | 13 (54) | 0.126 |
| Postdilation balloon inflation pressure (atm) | 16±4 | 17±4 | 0.334 |
| Postdilation balloon maximal diameter (mm) | 3.6±0.5 | 3.7±0.6 | 0.559 |
| Thrombectomy use | 60 (41) | 8 (33) | 0.472 |
| Screening time | 12.3±7.4 | 14.5±11.7 | 0.233 |
| Radiation exposure (DAP) | 5553±3427 | 5618±2940 | 0.930 |
Continuous variables are expressed as mean±SD with correlation investigated with one-way analysis of variance. Categorical variables are expressed as number (percentage) with correlation investigated with χ2 test. P<0.05 was deemed significant; however, p<0.1 (bold) suggested further analysis was required.
DAP, dose area product.