Table 3.
Presenting Characteristics
| Variables | Cases (n=219) | Controls (n=441) | P Value |
|---|---|---|---|
| Time from symptom to PPCI, min (IQR) | 145 (107 to 207) | 187 (127 to 296) | <0.001 |
| LVEF after PCI, mean±SD (%)* | 41.65±11.9% | 46.2±10.45% | <0.001 |
| CK‐MB max, μg/L (IQR) | 232 (76 to 393) | 138 (51 to 277) | <0.001 |
| Time to peak, min (IQR) | 783 (552 to 967) | 660 (497 to 880) | <0.001 |
| Acute CABG, n (%) | 18 (9) | 13 (3) | 0.002 |
| Culprit lesion, n (%) | |||
| LAD | 118 (54) | 202 (46) | 0.001 |
| RCA | 71 (33) | 185 (42) | |
| CX | 23 (11) | 54 (12) | |
| >1 | 5 (2) | 0 (0) | |
| Infarct location, n (%) | |||
| Anterior | 123 (57) | 202 (46) | 0.009 |
| Nonanterior | 94 (43) | 239 (54) | |
| Preprocedural TIMI flows, n (%) | |||
| TIMI 0 | 126 (58) | 221 (50) | 0.080 |
| TIMI I | 17 (8) | 45 (10) | |
| TIMI II | 19 (9) | 65 (15) | |
| TIMI III | 56 (25) | 108 (25) | |
| Postprocedural TIMI flows, n (%) | |||
| TIMI 0 | 8 (4) | 8 (2) | 0.140 |
| TIMI I | 0 (0) | 0 (0) | |
| TIMI II | 9 (4) | 10 (2) | |
| TIMI III | 201 (92) | 421 (96) | |
| ECG* | Cases (n=209) | Controls (n=401) | |
| PQ interval, milliseconds (IQR) | 164 (146 to 192) | 164 (148 to 182) | 0.300 |
| QRS interval, milliseconds (IQR) | 96 (88 to 108) | 97 (88 to 106) | 0.700 |
| QTc interval, milliseconds (IQR) | 415 (404 to 440) | 416 (406 to 432) | 0.700 |
| LBBB, n (%) | 21 (10) | 9 (2) | <0.001 |
| RBBB, n (%) | 30 (14) | 17 (4) | <0.001 |
| ST deviation, mm (IQR) | 4 (2 to 6) | 2 (1 to 4) | <0.001 |
| Killip class, n (%)* | Cases (n=171) | Controls (n=355) | |
| I | 145 (85) | 343 (97) | <0.001 |
| II | 9 (5) | 12 (3) | |
| III | 7 (4) | 0 (0) | |
| IV | 10 (6) | 0 (0) |
CABG indicates coronary artery bypass grafting; CK‐MB, creatine kinase‐MB; CX, circumflex artery; LAD, left anterior descending; LBBB, left bundle branch block; LVEF, left ventricular ejection fraction; PCI, percutaneous coronary intervention; PPCI, primary percutaneous coronary intervention; RBBB, right bundle branch block; RCA, right coronary artery; TIMI, thrombolysis in myocardial infarction.
*
LVEF cases, n=184; LVEF controls, n=429.
*
Missing value for Killip class (20%), for ECG (8%) and for LVEF (7%).