Revised Cardiac Risk Index (RCRI) Calculator
Score perioperative cardiac risk before non-cardiac surgery with the Revised Cardiac Risk Index (Lee index) — six factors, one point each.
Tick each risk factor that applies:
What is the Revised Cardiac Risk Index?
The Revised Cardiac Risk Index (RCRI, or Lee index) estimates the risk of major cardiac complications after non-cardiac surgery. Each of six factors scores one point.
RCRI score and estimated risk
| Score | Class | Est. major cardiac event risk |
|---|---|---|
| 0 | I | ~0.4% |
| 1 | II | ~0.9% |
| 2 | III | ~6.6% |
| ≥ 3 | IV | ~11% |
Event rates are the commonly cited estimates from Lee et al.; more recent cohorts report somewhat different figures. Use as an educational reference.
Frequently asked questions
What is the Revised Cardiac Risk Index?
The RCRI (Lee index) estimates the risk of major cardiac complications after non-cardiac surgery using six equally weighted risk factors.
What are the six RCRI risk factors?
High-risk surgery, ischaemic heart disease, congestive heart failure, cerebrovascular disease, insulin-treated diabetes, and a preoperative creatinine over 2.0 mg/dL.
How is the RCRI scored?
Each of the six factors scores one point; the total (0 to 6) maps to a risk class, with higher scores indicating higher perioperative cardiac risk.