Cardiology
Revised Cardiac Risk Index (RCRI)
The RCRI estimates the risk of a major cardiac event after non-cardiac surgery from six equally weighted clinical factors. It is the starting point of most preoperative cardiac assessments.
Enter the values
Result
0/ 6
Low risk
Low perioperative cardiac risk. Further cardiac testing rarely changes management at this level.
- Estimated risk of a major cardiac event (30 days)
- 3.9%
This calculator is provided for reference and education. It does not replace clinical assessment, examination, current guidelines, local protocol, or professional judgment. Verify every result before acting on it. Nirogix accepts no liability for clinical decisions made using this tool.
The formula
- One point for each of the six factors. Range 0 to 6; two or more marks elevated risk.
Worked example
Ischemic heart disease plus insulin-treated diabetes before a laparotomy → 1 + 1 + 1 = 3, elevated risk
When to use it
- Preoperative assessment before non-cardiac surgery
And when not to
- It does not apply to cardiac surgery, or to emergency surgery where the decision to operate is already made.
- Functional capacity is a strong independent predictor the index does not capture, so ask about it separately.
References
- Derivation and prospective validation of a simple index for prediction of cardiac risk — Lee TH et al., Circulation, 1999
Last reviewed 07/09/2026.
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