Table 2.
Presentation Characteristics Stratified by Center Volume
|
Low‐volume center (n=537, 52%) |
Intermediate‐volume center (n=240, 23%) |
High‐volume center (n=255, 25%) |
|
|---|---|---|---|
| Coronary artery characteristics | |||
| Number of diseased vessels | |||
| Single‐vessel disease | 76 (14.3) | 34 (14.5) | 27 (10.9) |
| Double‐vessel disease | 171 (32.3) | 68 (28.9) | 75 (30.4) |
| Triple‐vessel disease | 283 (53.4) | 133 (56.6) | 145 (58.7) |
| Coronary artery with culprit lesion | |||
| RCA | 154 (29.1) | 62 (26.7) | 68 (27.6) |
| Left main | 51 (9.6) | 14 (6.0) | 16 (6.5) |
| LAD | 214 (40.4) | 108 (46.6) | 113 (45.9) |
| CFX | 102 (19.2) | 46 (19.8) | 48 (19.5) |
| CABG | 9 (1.7) | 2 (0.9) | 1 (0.4) |
| TIMI‐flow pre‐PCI (culprit lesion) | |||
| 0 | 262 (50.5) | 147 (62.6) | 154 (63.4) |
| 1 | 68 (13.1) | 26 (11.1) | 28 (11.5) |
| 2 | 92 (17.7) | 21 (8.9) | 37 (15.2) |
| 3 | 97 (18.7) | 41 (17.4) | 24 (9.9) |
| Clinical characteristics | |||
| Mechanical ventilation | 333 (63.2) | 141 (59.5) | 121 (52.6) |
| Fibrinolysis within 24 h | 33 (6.3) | 12 (5.0) | 16 (7.0) |
| Resuscitation within 24 h | 303 (57.5) | 140 (58.8) | 97 (42.2) |
| Systolic blood pressure, mm Hg | 106 (±30) | 106 (±32) | 106 (±31) |
| Diastolic blood pressure, mm Hg | 65 (±20) | 65 (±23) | 64 (±18) |
| Heart rate, bpm | 91 (±27) | 89 (±24) | 93 (±28) |
| ST‐elevation or LBBB | 375 (73.0) | 174 (74.4) | 159 (71.3) |
| Atrial fibrillation | 63 (12.2) | 22 (9.4) | 37 (16.4) |
| Creatinine, μmol/L | 111 (90, 141) | 106 (88, 139) | 116 (93, 149) |
| Arterial lactate, mmol/L | 5.4 (2.7, 8.9) | 5.2 (2.6, 8.7) | 4.4 (2.6, 8.1) |
| Mechanical circulatory support | 165 (30.7%) | 88 (36.7%) | 49 (19.2%) |
| IABP | 70 (42.4%) | 29 (33.0%) | 21 (42.9%) |
| Impella 2.5 | 30 (18.2%) | 12 (13.6%) | 2 (4.1%) |
| Impella CP | 37 (22.4%) | 20 (22.7%) | 11 (22.4%) |
| VA‐ECMO | 35 (21.2%) | 35 (39.8%) | 23 (46.9%) |
| Other | 4 (2.4%) | 2 (2.3%) | 0 (0%) |
Bpm indicates beats per minute; CABG, coronary artery bypass graft; CFX, circumflex artery; IABP, intra‐aortic balloon pump; LAD, left anterior descending artery; LBBB, left bundle‐branch block; PCI, percutaneous coronary intervention; RCA, right coronary artery; TIMI, Thrombolysis in Myocardial Infarction; and VA‐ECMO, veno‐arterial extracorporeal membrane oxygenation therapy.