Rhythm on arrival of emergency medical services
| Witnessed and unwitnessed events | Witnessed events only | |
|---|---|---|
| Total number of events | 279 | 91 |
| Ventricular fibrillation | 75 (27%) | 48 (53%) |
| Asystole | 190 (68%) | 35 (38%) |
| Pulseless electrical activity | 14 (5%) | 8 (9%) |