TIMI Risk Score for STEMI

TIMI Risk Score for STEMI

TIMI Risk Score for STEMI (ST-Elevation Myocardial Infarction) was introduced by D A Morrow, E M Antman, A Charlesworth, R Cairns, S A Murphy, J A de Lemos, R P Giugliano, C H McCabe and E Braunwald [1]. But somehow it has not become as popular as the TIMI risk score for unstable angina. Eight parameters are included with a maximum possible risk score of 14 points and minimum possible score of zero. Age between 65-74 years is given a score of 2 points, while age of 75 or above gets a score of 3 points. Systolic pressure below 100 gets 3 points while heart rate above 100 has 2 points and so has Killip class II-IV. Anterior STEMI or LBBB (left bundle branch block) has 1 point. Presence of diabetes, history of hypertension or angina together gets 1 point. Weight below 67 and time to treatment more than 4 hours gets 1 point each. The predicted 30 day mortality is 0.8 % with zero risk score while it is 35.9 with TIMI score more than 8. This means over a 40 fold increase in risk of mortality from the lower end of the score to the upper end.

Reference

1. D A Morrow, E M Antman, A Charlesworth, R Cairns, S A Murphy, J A de Lemos, R P Giugliano, C H McCabe, E Braunwald. TIMI risk score for ST-elevation myocardial infarction: A convenient, bedside, clinical score for risk assessment at presentation: An intravenous nPA for treatment of infarcting myocardium early II trial substudy. Circulation. 2000 Oct 24;102(17):2031-7.