Patients with myocardial infarction and non-diagnostic ECGs at the time of presentation (0–24 h)
| Time from pain onset | Number of patients | Initial ECG | Raised troponin T | Raised myoglobin | Raised total CK | CKMB activity | CKMB mass |
|---|---|---|---|---|---|---|---|
| *n = indicates where the number of patients with a result available is fewer than the number of patients in that group. C = ST depression, T wave inversion or ST elevation insufficient to be diagnostic. N = normal. | |||||||
| ≤2 h | 4 | 4=C | 1 | 0 | 0 | 1 | 0 |
| >2≤4 h | 4 | 4=C | 1 | 3 | 0 | 0 | 2 |
| >4≤6 h | 2 | 1=N | 0 | 0 | 0 | 0 | 1 |
| 1=C | 0 | 0 | 0 | 0 | 0 | ||
| >6≤24 h | 4 | 4=C | 4 | 3 | 4 | 3 | 3 *n=3 |