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Circumstances of cardiac arrest
| Variable | Group ≤ 6 hours (n=61) | Group > 6 hours or no Cath (n=179) | P value |
|---|---|---|---|
| Ventricular fibrillation initial rhythm | 61 (100%) | 173 (97%) | 0.15 |
| Acute symptoms prior to cardiac arrest | 23 (38%) | 42 (24%) | 0.024 |
| Bystander CPR | 30 (49%) | 90 (50%) | 0.88 |
| Witnessed arrest | 53 (87%) | 147 (82%) | 0.39 |
| Daytime presentation | 49 (82%) | 125 (70%) | 0.12 |
CPR cardiopulmonary resuscitation
