Revised Cardiac Risk Index Calculator
Revised cardiac risk index calculator works out Score and Index used from Index, High-risk surgery and History of ischaemic heart disease. The default figures on this page give score of 0; change any entry and the result, the working and the sources update together.
Your figures
Updates as you typeHow this is worked out
4 steps
- None of the six Lee predictors is present.
- Score = 0, i.e. Class I.
- Canadian Cardiovascular Society 2017 pooled estimate (24 studies, n = 792,740): 3.9% (95% CI 2.8-5.4%).
- For comparison, Lee 1999 prospective validation cohort (n = 1,422) gives 0.4% for the same score.
Criteriatable
| criterion | points | maximum | met |
|---|---|---|---|
| High-risk surgery | 0 | 1 | No |
| History of ischaemic heart disease | 0 | 1 | No |
| History of congestive heart failure | 0 | 1 | No |
| History of cerebrovascular disease (stroke or TIA) | 0 | 1 | No |
| Preoperative insulin treatment for diabetes | 0 | 1 | No |
| Preoperative serum creatinine above 2.0 mg/dL (177 µmol/L) | 0 | 1 | No |
Its 5 worked examples are re-run on every release, last on 15 September 2026. What changed
Sources and references
3 sources
What the revised cardiac risk index calculator calculates
Scores perioperative cardiac risk before non-cardiac surgery by the Revised Cardiac Risk Index of Lee et al., reporting both the original 1999 validation-cohort event rates and the CCS 2017 pooled estimates, and by the original 1977 Goldman multifactorial index with its class and published complication rate.
How to use this revised cardiac risk index calculator
Enter Index, High-risk surgery, History of ischaemic heart disease and History of congestive heart failure. Score updates as you type, and “Use a worked example” loads checked figures you can adjust. Change one figure at a time to see what drives the result.
How the result is worked out
Open “How this is worked out” beside the result for the step-by-step calculation behind Score, Index used and Risk class.
The method follows Lee TH, Marcantonio ER, Mangione CM, et al. Derivation and prospective validation of a simple index for prediction of cardiac risk of major noncardiac surgery, Duceppe E, Parlow J, MacDonald P, et al. Canadian Cardiovascular Society guidelines on perioperative cardiac risk assessment and management for patients who undergo noncardiac surgery and Goldman L, Caldera DL, Nussbaum SR, et al. Multifactorial index of cardiac risk in noncardiac surgical procedures.
Two RCRI predictors: intraperitoneal surgery in a patient with ischaemic heart disease example
With Index: rcri, High-risk surgery: true, History of ischaemic heart disease: true, Event-rate table: ccs-2017, the calculator returns Score: 2, Published event rate: 10.1, The other published rate for this score: 7. This example is checked against an independent source in the test suite.
What you can compare
Change one input at a time to see how it affects Score, Index used and Risk class. The inputs you can vary are Index, High-risk surgery, History of ischaemic heart disease, History of congestive heart failure, History of cerebrovascular disease (stroke or TIA) and Preoperative insulin treatment for diabetes.
Understanding Score, Index used and Risk class
A risk index, not a decision. Both indices were derived in specific surgical populations decades apart and neither includes functional capacity, the urgency of the operation as a continuous variable, or biomarker data. Perioperative management is a clinical judgement.
Results are general information, not financial, tax, legal, medical or engineering advice. Check any decision that matters with a qualified professional.
See something wrong? Report a problem with this calculator
Frequently asked questions
What information do I need for the revised cardiac risk index calculator?
You need Index, High-risk surgery, History of ischaemic heart disease, History of congestive heart failure, History of cerebrovascular disease (stroke or TIA), Preoperative insulin treatment for diabetes, Preoperative serum creatinine above 2.0 mg/dL (177 µmol/L) and Event-rate table. The page opens with default figures that give score of 0, so you can see the scale before entering your own.
What does this revised cardiac risk index calculator show?
It shows Score, Index used, Risk class, Published event rate, 95% confidence interval, What "event" means here, Rate taken from and The other published rate for this score, with the working and any warnings for your entries.
Can I check how the revised cardiac risk index calculator result was calculated?
Yes. The “How this is worked out” section shows the calculation steps, and the sources section identifies the references used for the method.