The Cardiovascular
ToolsCalculators

TIMI Risk Index

TIMI Risk Index
Heart rate
bpm
Age
years
Systolic blood pressure
mmHg
Complete the fields above to see the result.

When to use

  • Rapid bedside mortality-risk stratification in suspected ACS/STEMI using only heart rate, age, and systolic BP - no labs required.

Formula

TIMI Risk Index = [heart rate x (age/10)^2] / systolic blood pressure.

Pearls and pitfalls

  • Derived and validated in >150,000 STEMI patients in the National Registry of Myocardial Infarction.
  • Uses only vital signs and age, making it usable before any labs or ECG interpretation are available.

References

  1. Wiviott SD, et al. J Am Coll Cardiol. 2004;44(4):783-9.