| Clinical | STEMI | NSTEMI angina | Unstable | Stable angina | Non cardiac chest pain |
| ECG | Agonizing pain | Rest pain, DM, post MI, prior ASA |
| Exertional pain | Atypical pain |
| Cardiac markers | ST elevation | ST, T wave changes |
| Negative | Negative |
| Risk assessment | Positive | Positive High risk 11 |
| Negative | Negative |
|
| STEMI |
|
| Low risk | Low probability |