| Demographic | Value* | |
| Age (years), mean (range) | 68.2 (32.2 to 94.2) | |
| M/F | 106/37 | |
| Past medical history | ||
| Myocardial infarction | 64 (45) | |
| Angina | 61 (43) | |
| Heart failure† | 44 (31) | |
| Hypertension† | 42 (29) | |
| Arrhythmia‡ | 44 (30) | |
| Valve disease | 20 (14) | |
| Any cardiovascular condition | 112 (78) | |
| Diabetes mellitus | 27 (19) | |
| Current smoker | 51 (36) | |
| Ex-smoker | 44 (31) | |
| Cardiac arrest and resuscitation | ||
| VF or pulseless VT | 112 (78) | |
| Asystole | 16 (11) | |
| Pulseless electrical activity | 16 (11) | |
| At home | 61 (43) | |
| Witnessed | 116 (81) | |
| Bystander CPR | 94 (66) | |
| Number of DC shocks (median (range) for VF/VT) | 2 (1–22) |
CPR, cardiopulmonary resuscitation; VF, ventricular fibrillation; VT, ventricular tachycardia.
*Results shown as No (%) unless stated otherwise.
†Receiving drug treatment.
‡Includes atrial and ventricular arrhythmias.