The Thrombolysis In Myocardial Infarction (TIMI) Score is used to estimate the risk of death, risk of MI, or need for urgent cardiac catheterization in patients with Unstable Angina (UA) or Non-ST segment Elevation Myocardial Infarction (NSTEMI). Each risk factor is worth one point, for a max score of 7. The higher the score, the greater likelihood that one of the above events will occur. This score can help guide decision making, mostly to determine if the patient will need a cardiac catheterization or other method of ruling out cardiac ischemia.
A good way to remember the components of the TIMI Score for UA/NSTEMI is with the mnemonic ABCDE:
A Age, Aspirin, Angina
C CAD risk factors
D Diagnosis of CAD
E EKG changes
The exact criteria are listed below:
Age ≥ 65, Aspirin use in past 7 days, Severe Angina (≥ 2 episodes within 24 hours)
Positive cardiac Biomarker (troponin, CKMB)
≥ 3 Risk Factors for CAD
Diagnosis of CAD (stenosis ≥ 50%) in the past
ST changes ≥ 0.5mm on EKG
“Mdcalc.com | TIMI Risk Score for UA/NSTEMI.” Mdcalc.com | TIMI Risk Score for UA/NSTEMI. Web. 09 Aug. 2012. <http://www.mdcalc.com/timi-risk-score-for-uanstemi/>.
“TIMI Study Group.” TIMI Study Group. Web. 09 Aug. 2012. <http://www.timi.org/>.