Revised Cardiac Risk Index (RCRI)

What This Calculator Measures

Estimates the 30-day risk of major cardiac complications (MI, pulmonary edema, ventricular fibrillation or primary cardiac arrest, complete heart block) in patients undergoing non-cardiac surgery.

How to Use

1. Confirm the surgical procedure and the patient's cardiovascular history.
2. Assign 1 point for each of the six RCRI predictors present.
3. Sum the points (0–6).
4. Interpret the score together with functional capacity and surgical risk to plan perioperative management.

Interpretation Guide

Score 0: ~0.4% risk; 1: ~0.9%; 2: ~7%; ≥3: ~11%. Patients with higher scores warrant closer perioperative cardiac monitoring and optimization of modifiable risk factors.

Clinical Significance

RCRI remains the most widely validated and guideline-endorsed index for perioperative cardiac risk in non-cardiac surgery, framing the preoperative risk assessment.

When to Use

• Preoperative cardiac risk stratification for non-cardiac surgery
• Guiding perioperative testing and monitoring intensity
• Informed consent discussions about surgical cardiac risk

When Not to Use

• Cardiac surgery — use procedure-specific risk tools
• As a replacement for clinical assessment of functional capacity and acute cardiac conditions

Limitations

• Derived from a predominantly male cohort from a single tertiary center in the 1990s.
• Does not capture age, functional capacity, or procedure-specific risk separately.
• Predicted risk may underestimate current event rates given changes in surgical and anesthetic practice.

Worked Example

A 68-year-old insulin-treated diabetic with known ischemic heart disease is scheduled for open colectomy. Preoperative creatinine is 2.2 mg/dL.

RCRI score 4 — HIGH risk (~11% major cardiac events). Close perioperative cardiac monitoring and optimization of cardiac risk factors are warranted.

Evidence

Source

Original RCRI Description

Reference

Lee TH, et al. Derivation and prospective validation of a simple index for prediction of cardiac risk of major noncardiac surgery. Circulation. 1999;100(10):1043-1049.

Reviewed By

MedCalcHub Clinical Team

Version

1.0

Updated

2026-08

1. Lee TH, et al. Circulation. 1999;100(10):1043-1049.

References

1. Lee TH, et al. Derivation and prospective validation of a simple index for prediction of cardiac risk of major noncardiac surgery. Circulation. 1999;100(10):1043-1049. (Level II)