Angiographical and procedural characteristics of patients presenting with ST-elevation myocardial infarction comparing the NR group with the control group
| NR | P value | ||
| No (n=149) | Yes (n=24) | ||
| Presence of multivessel disease | 95 (64) | 20 (83) | 0.059 |
| Culprit vessel | |||
| LAD | 52 (35) | 7 (29) | 0.8 |
| RCA | 72 (48) | 14 (58) | |
| LCx | 15 (10) | 2 (8) | |
| Other | 10 (7) | 1 (4) | |
| Reference vessel diameter (mm) | 3.0±0.6 | 3.0±0.5 | 1.0 |
| Lesion length (mm) | 15.2±10.3 | 18.3±7.5 | 0.2 |
| Lesion complexity | |||
| A | 0 | 0 | 0.001 |
| B1 | 48 (32) | 1 (4) | |
| B2 | 85 (57) | 15 (63) | |
| C | 16 (11) | 8 (33) | |
| Thrombus class | |||
| 0 | 3 (2) | 0 | 0.2 |
| 1 | 7 (5) | 0 | |
| 2 | 2 (1) | 1 (4) | |
| 3 | 13 (9) | 0 | |
| 4 | 17 (11) | 3 (13) | |
| 5 | 107 (72) | 20 (83) | |
| Initial TIMI flow | |||
| 0 | 105 (71) | 20 (83) | 0.4 |
| 1 | 16 (11) | 1 (4) | |
| 2 | 18 (12) | 1 (4) | |
| 3 | 10 (7) | 2 (8) | |
| Collaterals | |||
| No | 82 (55) | 9 (38) | 0.104 |
| Yes | 66 (45) | 15 (62) | |
| Final TIMI flow | |||
| 0 | 0 | 2 (8) | <0.001 |
| 1 | 4 (3) | 5 (21) | |
| 2 | 11 (7) | 15 (63) | |
| 3 | 134 (90) | 2 (8) | |
| Final myocardial blush grade | |||
| 0 | 3 (2) | 8 (33) | <0.001 |
| 1 | 5 (3) | 7 (29) | |
| 2 | 9 (6) | 8 (33) | |
| 3 | 128 (88) | 1 (4) | |
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.
LAD, left anterior descending; LCx, circumflex; NR, no reflow; RCA, right coronary artery; TIMI, thrombolysis in myocardial infarction.