No of patients with relative contraindications for ECPR according to the Danish national 2018 recommendation stratified according to whether treatment was initiated or not
| Variable | Total (n=579) | ECPR initiated (n=221) | No ECPR (n=358) | P value |
| National consensus | ||||
| Age >65 years | 163 (28) | 32 (14) | 131 (37) | <0.001 |
| Unwitnessed arrest | 90 (16) | 30 (14) | 60 (17) | 0.30 |
| No bystander CPR | 44 (8) | 11 (5) | 33 (10) | 0.06 |
| Asystole | 93 (16) | 20 (9) | 73 (21) | <0.001 |
| No-flow time ≥10 min* | 54 (9) | 13 (6) | 41 (12) | 0.02 |
| ETCO2<1.3 kPa | 91 (16) | 11 (5) | 80 (22) | <0.001 |
| Number of contraindications | <0.001 | |||
| None | 243 (43) | 139 (64) | 104 (30) | |
| One | 189 (34) | 54 (25) | 135 (39) | |
| Two or more | 133 (13) | 26 (11) | 107 (31) | |
| Local reccomendation | ||||
| Prehospital low-flow time >100 min† | 59 (10) | 27 (12) | 32 (9) | 0.21 |
| Lactate >15 mmol/L | 233 (51) | 84 (39) | 149 (61) | <0.001 |
| pH<6.8 | 88 (20) | 31 (15) | 57 (25) | 0.006 |
Values are presented as numbers and percentages. A value of p<0.05 is considered statistically significant.
*Time from cardiac arrest to bystander CPR.
†Time from cardiac arrest to arrival at centre.
CPR, cardiopulmonary resuscitation; ECPR, extracorporeal cardiopulmonary resuscitation; ETCO2, end-tidal carbon dioxide.