By Zencalcy Editorial TeamLast reviewed About us
The TIMI risk score for NSTEMI and unstable angina combines seven bedside findings into a single number from 0 to 7. It was designed to stratify short-term risk in people being assessed for acute coronary syndrome. This calculator adds one point for each criterion present and reports the usual low, intermediate or high band.
Seven-item risk score for NSTEMI and unstable angina.
TIMI = age ≥65 + ≥3 CAD risk factors + known CAD ≥50% + aspirin in 7 days + severe angina + ST change ≥0.5 mm + positive marker
Every item scores one point, so the maximum is 7. Scores of 0–2 are commonly grouped as lower risk, 3–4 as intermediate and 5–7 as higher risk. The score describes a population pattern and does not replace serial ECGs, troponin testing or clinical judgement about the need for invasive assessment.
| Symbol | Meaning |
|---|---|
| Score | Total TIMI points, from 0 to 7. |
| Risk factors | Three or more coronary risk factors gives one point. |
| ST change | ST deviation of at least 0.5 mm gives one point. |
Age 65 or older adds 1, three or more coronary risk factors add 1, known CAD adds 1 and ST deviation adds 1, giving 4 out of 7. That sits in the intermediate band. A younger patient with none of the seven criteria scores 0 out of 7, while someone with all seven scores 7 out of 7.
The value of the TIMI score is that every item is available early, often before advanced testing is complete. Age, risk factors, known disease, recent aspirin, symptom pattern, ST deviation and a positive marker can be gathered at the bedside. That makes the score useful for triage and for communicating risk between teams. It is less useful as a stand-alone rule, because modern practice relies heavily on high-sensitivity troponin and on the overall trajectory rather than a single value. The score also treats each item equally, even though the underlying risks differ. Use it as one input in a structured assessment, and let the treating clinician decide on monitoring, medication and invasive investigation.
Continue with the Mean Arterial Pressure Calculator, Pulse Pressure Calculator, or the QTc Calculator — or browse more cardiology tools and all health calculators.
It stratifies short-term risk of adverse cardiac events in people with non-ST-elevation acute coronary syndrome. It helps frame how aggressively to investigate, but it does not diagnose a heart attack or dictate a specific treatment.
Blood pressure, ECG and risk scores are screening aids, not diagnoses. A single reading can be misleading; trends and proper technique matter. Scores estimate population risk and do not replace clinical assessment, anticoagulation decisions or emergency care.
Reference material used to build and check this calculator:
Last reviewed: September 2026. See how we build and check every tool on the about page.
Content updated: September 2026