Revised Cardiac Risk Calculator

Calculator Form

Complete the fields below. The score appears above this form after submission.

Patient Name

Assessment Date

Age

Age is stored for reporting only.

Sex

Planned Procedure

Surgery Category

High-risk surgery commonly includes intraperitoneal, intrathoracic, or suprainguinal vascular procedures.

Serum Creatinine

Creatinine Unit

Renal Override

Count renal insufficiency even if creatinine is unavailable

History of ischemic heart disease

Examples include prior myocardial infarction or angina.

History of congestive heart failure

Tick this if heart failure is part of the known history.

History of cerebrovascular disease

Examples include prior stroke or transient ischemic attack.

Diabetes treated with insulin

This predictor counts only when insulin therapy is used.

Clear Form

Example Data Table

Patient	Procedure Type	IHD	CHF	CVD	Insulin	Renal	Score	Class
Case A	Low-risk hernia repair	No	No	No	No	No	0	Class I
Case B	High-risk abdominal surgery	Yes	No	No	No	No	2	Class III
Case C	Thoracic procedure	Yes	Yes	No	Yes	Yes	5	Class IV

Formula Used

The Revised Cardiac Risk Index assigns one point for each predictor present. Add all positive predictors to obtain the total score.

RCRI Score = High-risk surgery + Ischemic heart disease + Congestive heart failure + Cerebrovascular disease + Insulin-treated diabetes + Renal insufficiency.
High-risk surgery: counts as 1 point when the planned operation falls into the high-risk category.
Renal insufficiency: counts as 1 point when serum creatinine is greater than 2.0 mg/dL, or when manually overridden.
Risk classes: 0 factors = Class I, 1 factor = Class II, 2 factors = Class III, 3 or more factors = Class IV.
Interpretation used here: 0–1 factors indicate risk below 1%, 2 factors nearly 7%, and 3 or more about 11%.

How to Use This Calculator

Enter optional patient details for documentation and exports.
Select whether the planned operation is high-risk or not.
Enter serum creatinine and choose the correct unit.
Tick each clinical predictor that is already known to be present.
Use renal override only when renal insufficiency is known but the laboratory value is unavailable.
Press the calculate button to display the result above the form.
Review the score, class, estimated risk, and factor table.
Use the CSV or PDF buttons to save the assessment.

Frequently Asked Questions

1. What does this calculator estimate?

It estimates perioperative cardiac complication risk for noncardiac surgery using the Revised Cardiac Risk Index and summarizes the result into a simple score and class.

2. How many predictors are included?

Six predictors are included. Each positive predictor adds one point, making the tool easy to use during preoperative assessment and documentation.

3. Does age change the score?

No. Age is stored only for reporting in this file. The RCRI score itself depends on the six defined clinical predictors, not age alone.

4. What counts as high-risk surgery here?

This option is intended for operations commonly considered high-risk, such as major intraperitoneal, intrathoracic, or suprainguinal vascular procedures.

5. Why is insulin therapy a separate item?

The index specifically counts diabetes treated with insulin. Diabetes without insulin therapy does not add a point in this scoring model.

6. How is renal insufficiency handled?

Renal insufficiency adds one point when creatinine exceeds 2.0 mg/dL. A manual override is also available when laboratory data are unavailable but impairment is already confirmed.

7. Can I save the assessment?

Yes. After calculation, you can download a CSV report or create a PDF summary for records, referrals, or case discussion.

8. Is this tool enough for final clearance?

No. It supports structured estimation only. Final decisions should include clinical judgment, procedure urgency, functional status, and specialist advice when needed.