Table 1.
Patient characteristics
| Characteristic | Total (n=34) |
|---|---|
| Age, mean±SD, years | 75.6±12.8 |
| Sex, n (male/female) | 21/13 |
| Bystander/witness status, n | |
| No witness | 8 |
| No bystander with witness | 10 |
| Family members | 5 |
| Others | 11 |
| Initially documented rhythm at scene of cardiac arrest, n | |
| VF/pulseless VT | 4 |
| PEA | 15 |
| Asystole | 15 |
| Time from call to hospital arrival, mean±SD, min | 31.0±11.4 |
| Intubation by EMS personnel, n | 8 |
| Rhythm at rSO2 measurement, n | |
| VF/pulseless VT | 1 |
| PEA | 12 |
| Asystole | 21 |
| Return of spontaneous circulation, n | 13 |
VF: ventricular fibrillation; VT: ventricular tachycardia; PEA: pulseless electrical activity; EMS: emergency medical services; rSO2: regional cerebral oxygen saturation.