TIMI Risk Score Calculator for UA/NSTEMI
Seven equally weighted items that estimate 14 day risk in unstable angina and NSTEMI, and help decide who benefits from an early invasive strategy.
Reading the score
In the original validation, the 14 day risk of death, new or recurrent MI, or urgent revascularization climbed stepwise with the score: roughly 5 percent at 0 to 1, 8 percent at 2, 13 percent at 3, 20 percent at 4, 26 percent at 5, and around 41 percent at 6 to 7. The practical cut most services use: 0 to 2 is lower risk and can often be managed with an initial conservative strategy; 3 or more favors an early invasive approach, as does any high risk feature regardless of the score, such as refractory angina, hemodynamic instability, or electrical instability.
The aspirin item confuses everyone the first time: recent aspirin use raises risk because an event that broke through aspirin is a more resistant lesion, not because aspirin is harmful. The full ACS pathway, and how it differs from the STEMI pathway, is in the cardiology rotation guide; the anticoagulation that accompanies it is in the heparin drip guide, and the risk stratification conversation pairs naturally with the HEART score at the front door.
This is not medical advice. Educational tool. The score applies to unstable angina and NSTEMI, not STEMI, which has its own score and its own clock. Institutional pathways and current references govern.