TIMI risk score for unstable angina and NSTEMI
Tick the risk factors present in a patient with unstable angina or a heart attack without ST elevation (NSTEMI) to get the TIMI risk score and the 14-day event rate from the study that built it. It is information for clinicians, not a diagnosis.
Runs in your browser: nothing you enter is sent anywhere.
How to use it
- Tick each of the seven factors that applies.
- Read the score from 0 to 7 and the 14-day event rate next to it.
How the score works
Each factor is worth one point. The event rates below are those of the derivation cohort.
| Score |
14-day events |
| 0–1 |
4.7% |
| 2 |
8.3% |
| 3 |
13.2% |
| 4 |
19.9% |
| 5 |
26.2% |
| 6–7 |
40.9% |
Worked example
A 71-year-old woman who takes aspirin daily has had three episodes of chest pain today, ST depression of 1 mm and a raised troponin. Age 1 + aspirin 1 + angina 1 + ST 1 + marker 1 = 5 points, 26.2% in the study.
Tips
- Count the coronary risk factors carefully: two are not enough for the point.
- Known stenosis means a previous angiogram showed a narrowing of 50% or more.
- The score is one input among several; ECG changes, troponin trends and the patient’s condition guide treatment.
- This page is for information; chest pain needs urgent medical assessment.
Frequently asked questions
What does the 14-day risk mean?
In the trial population the score was built on (Antman 2000), it is the share of patients who died, had a new or repeat heart attack, or had severe recurrent ischemia needing urgent revascularization within 14 days. Today's treatment differs, so real rates may be lower.
Which risk factors count towards the three?
Family history of coronary disease, high blood pressure, high cholesterol, diabetes and current smoking. Three or more of them give the point.
Is this the TIMI score for STEMI?
No. The STEMI version uses different items, such as blood pressure, heart rate, weight and time to treatment. This calculator is the UA/NSTEMI score.
Why does aspirin use add a point?
Patients who had an event despite taking aspirin did worse in the study, so recent aspirin use is a marker of more resistant disease, not a reason to stop it.