Version May 2024
| High likelihood |
| Any of the following features: |
| Primary symptom is pain or discomfort in chest or left arm AND current pain is similar to pain of prior documented angina/MI |
| Patient has known CHD OR MI |
| Transient mitral regurgitation OR hypotension OR diaphoresis OR pulmonary edema OR rales |
| New (or presumably new) transient ST deviation (≥1 mm) |
| New T-wave inversion in multiple precordial leads |
| Elevated cardiac troponin |
| Intermediate likelihood |
| Absence of high-likelihood features, a normal cardiac troponin, and presence of any of the following: |
| Primary symptom is pain or discomfort in chest or left arm |
| Older than 70 years of age |
| Male |
| Diabetes mellitus |
| Extracardiac vascular disease |
| Fixed Q waves |
| ST depression 0.5 to 1 mm or T-wave inversion >1 mm |
| Low likelihood |
| Absence of high- or intermediate-likelihood features and a normal cardiac troponin. May have any of the following and still be low likelihood: |
| History of symptoms that are probably ischemic |
| Recent use of cocaine |
| T-wave flattening or inversion <1 mm |
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