Ambulance initial clinical impressions and the final diagnosis available in the Combined National Dataset for all cases
| Final diagnosis in the Combined National Dataset (column %) | ||||||
| STEMI | NSTEACS | Other CHD | Non-CHD | Not admitted | Total | |
| Total | 5465 | 28 304 | 14 862 | 2 184 334 | 163 426 | 2 396 391 |
| Ambulance-suspected cardiac | ||||||
| Suspected STEMI | 2016 (36.9) | 472 (1.7) | 86 (0.6) | 733 (0.1) | 250 (0.2) | 3557 (0.1) |
| Other suspected ACS | 792 (14.5) | 6876 (24.3) | 2484 (16.7) | 21 931 (1.0) | 6249 (3.8) | 38 332 (1.6) |
| Ambulance ‘ACS not suspected’ | 1181 (21.6) | 8785 (31.0) | 3749 (25.2) | 367 642 (16.8) | 156 927 (96.0) | 538 284 (22.5) |
| Not attended by ambulance | 1476 (27.0) | 12 171 (43.0) | 8543 (57.5) | 1 794 028 (82.1) | – | 1 816 218 (75.8) |
CHD, coronary heart disease; NSTEACS, non-ST-elevated acute coronary syndrome; STEMI, ST-segment elevation myocardial infarction.