Baseline characteristics
| Total (N=116) | IABP (N=54) | Impella (N=62) | P value | |
| Age, years | 72(64–77) | 71(64–75) | 73(62–79) | 1.00 |
| Male | 85 (73) | 41 (76) | 44 (71) | 0.67 |
| BMI | 26(24–29) | 26(24–29) | 26(25–29) | 0.63 |
| Smoke | 29 (25) | 19 (35) | 10 (16) | 0.02 |
| Hypertension | 70 (60) | 34 (63) | 36 (58) | 0.70 |
| Hyperlipidaemia | 74 (64) | 38 (70) | 36 (58) | 0.18 |
| NIDDM | 52 (45) | 20 (37) | 32 (51) | 0.11 |
| Previous stroke | 7 (6.0) | 3 (3.7) | 5 (8.1) | 0.44 |
| Peripheral artery disease | 5 (4.3) | 3 (5.6) | 2 (3.2) | 0.66 |
| Previous MI | 18 (16) | 7 (13) | 11 (18) | 0.61 |
| Previous PCI | 22 (19) | 7 (13) | 15 (24) | 0.15 |
| One-vessel CAD | 18 (16) | 7 (13) | 11 (18) | 0.35 |
| Two-vessel CAD | 27 (23) | 12 (22) | 15 (24) | 0.35 |
| Three-vessel CAD | 68 (59) | 35 (65) | 33 (53) | 0.35 |
| CABG | 3 (2.6) | 0 (0) | 3 (4.9) | 0.24 |
| Pre-existing cardiomyopathy | 6 (5.2) | 3 (5.5) | 1 (1.6) | 0.45 |
| Pacemaker/CRT | 5 (4.3) | 1 (1.8) | 4 (6.5) | 0.37 |
| CKD | 20 (17) | 8 (15) | 12 (19) | 0.62 |
| CPR | 70 (60) | 32 (59) | 38 (61) | 0.45 |
| In hospital CPR | 38 (54) | 21 (66) | 17 (45) | 0.10 |
| Out of hospital CPR | 32 (46) | 11(34) | 21 (55) | 0.10 |
| Index event AMI | ||||
| STEMI | 82 (71) | 40 (74) | 42 (68) | 0.54 |
| NSTEMI | 34 (29) | 14 (26) | 20 (32) | 0.45 |
Data depicted as median (IQR) or counts (%). P values are from Wilcoxon rank sum test or Fischer test.
AMI, acute myocardial infarction; BMI, body mass index; CABG, coronaryartery bypass graft; CAD, coronary artery disease; CKD, chronic kidney disease; CPR, cardiopulmonary resuscitation; CRP, C reactive protein; CRT, cardiac resynchronization therapy; IABP-SHOCK II, Intra-aortic Balloon Pump in Cardiogenic Shock II; LDH, lactate dehydrogenase; MI, myocardial infarction; NIDDM, non-insulin-dependent diabetes mellitus; PCI, percutaneous coronary intervention; Pre-PCI time, time from symptom onset to the first PCI balloon inflation; Pre-device time, time from symptom onset to device implantation.