Perioperative cardiac risk index

Revised Cardiac Risk Index (RCRI) Calculator

Count the six RCRI predictors for a planned major noncardiac operation and view the matching historical event-rate class.

Clinical predictors

Review each predictor with the care team

Six-item score

Educational risk-tool calculation only. This does not provide surgical clearance, an individualized risk prediction, or treatment advice. A perioperative clinician should confirm the definitions and interpret the result in context.

History of cerebrovascular disease?

History of congestive heart failure?

History of ischemic heart disease?

Preoperative serum creatinine >2.0 mg/dL (176.8 µmol/L)?

Preoperative treatment with insulin?

High-risk noncardiac surgery under the RCRI definition?

Score and historical class

RCRI estimate

Your score will appear here

Confirm all six items for the planned operation before calculating.

What is RCRI Calculator?

The Revised Cardiac Risk Index (RCRI) counts six clinical predictors to help estimate risk of major cardiac complications around major noncardiac surgery. The original study developed and validated the index in stable adults undergoing nonurgent major procedures.

This page reproduces that historical score and its original validation-cohort event rates. It cannot clear someone for surgery, replace a preoperative assessment, or determine testing and treatment. Modern guidelines use a stepwise evaluation that also considers symptoms, urgency, functional capacity, the procedure, biomarkers, and other conditions.

How to Use This Calculator

Answer yes only when the patient meets the defined history of cerebrovascular disease, congestive heart failure, or ischemic heart disease.
Mark yes if preoperative serum creatinine is greater than 2.0 mg/dL (176.8 µmol/L).
Mark yes for preoperative insulin treatment and for a high-risk noncardiac surgical procedure under the score’s definition.
Select Calculate. Each yes contributes one point, producing a score from 0 to 6.
Have the surgical or perioperative team confirm every item and interpret the class.

Formula Used

RCRI score = sum of six predictors, one point each

The predictors are high-risk surgery, ischemic heart disease, congestive heart failure, cerebrovascular disease, preoperative insulin treatment, and preoperative creatinine above 2.0 mg/dL. The original validation cohort reported major cardiac complication rates of about 0.4% for 0 points, 0.9% for 1, 7% for 2, and 11% for 3 or more.

Variables Explained

One-point predictor	What must be checked clinically
Cerebrovascular disease	Relevant history such as stroke or transient ischemic attack under the score definition.
Congestive heart failure	Established history or qualifying clinical findings, not a self-diagnosis from one symptom.
Ischemic heart disease	Qualifying history such as myocardial infarction or other criteria in the original definition.
Creatinine >2.0 mg/dL	The preoperative laboratory threshold, equivalent to about 176.8 µmol/L.
Insulin treatment	Preoperative treatment of diabetes with insulin.
High-risk surgery	A procedure that meets the index’s high-risk category, confirmed by the clinical team.

Worked Example

Suppose a patient has a history of ischemic heart disease and receives insulin treatment before surgery. The other four predictors are absent. The score is 1 + 1 = 2 points.

In the original validation cohort, the 2-point class had an event rate of approximately 7% for the study’s major cardiac complication outcome. That historical percentage is not a personalized forecast. The treating team must combine the score with current guidelines, the actual operation, symptoms, examination, and other test results.

Why Use This Calculator?

More points indicate a higher observed risk class in the original cohorts. Event rates vary in later populations because surgical practice, patient mix, outcome definitions, and care have changed. The 3-or-more group shares one displayed historical rate even though scores can extend to 6.

The 2024 AHA/ACC multisociety guideline describes validated risk tools as one part of a stepwise perioperative approach. A low score does not eliminate risk, and a higher score does not automatically mean surgery should be cancelled. Decisions about tests, medicines, monitoring, and timing belong to the clinicians and patient. Seek urgent medical care for acute chest pain, severe breathlessness, fainting, or other emergency symptoms.

The outcome in the original work combined myocardial infarction, pulmonary edema, ventricular fibrillation or primary cardiac arrest, and complete heart block. Other studies may report a different composite, so percentages with similar labels are not necessarily interchangeable. Record the score version and outcome source when using it in clinical documentation or research.

Common Mistakes

Using the score for cardiac surgery or a setting outside its intended noncardiac-surgery context.
Guessing medical-history items without checking records or a clinician’s assessment.
Marking any diabetes as the insulin-treatment point.
Using creatinine at or below 2.0 mg/dL as a positive item when the criterion is above 2.0.
Applying the original percentages as exact individual predictions.
Letting the score replace evaluation of current symptoms, urgency, and procedure details.

Frequently Asked Questions

Is the RCRI a surgical clearance test?

No. It is one risk tool. The surgical and perioperative team must assess the patient, procedure, urgency, symptoms, and other relevant findings.

What score range is possible?

Six yes-or-no predictors produce a total from 0 through 6. The displayed historical event table groups all scores of 3 or more together.

Does any diabetes add a point?

No. This item concerns preoperative treatment with insulin, not diabetes managed without insulin.

What creatinine value adds a point?

The original criterion is serum creatinine greater than 2.0 mg/dL, approximately 176.8 µmol/L. A clinician should verify the laboratory result and timing.

Who decides whether surgery is high risk?

The clinical team should classify the planned procedure using the applicable definition and current guidance. Patients should not infer the category from the operation’s name alone.

Are the percentages current personal probabilities?

No. They are approximate rates from the original validation cohort for its defined outcome. Contemporary local risk can differ.

Should a higher score change medicine or testing?

Do not change treatment from this page. Current guidelines and a qualified clinician determine whether testing, monitoring, or medicine changes are appropriate.