About the RCRI (Revised Cardiac Risk Index)
The RCRI, often called the Lee Revised Cardiac Risk Index, is a bedside tool for estimating the risk of a major cardiac complication - death, myocardial infarction, or cardiac arrest - in the days after elective noncardiac surgery. Lee and colleagues published it in 1999 after studying patients undergoing major noncardiac procedures, and it remains one of the most widely used preoperative cardiac risk scores because it needs only six yes/no clinical facts.
How the score is built
One point is added for each of six independent risk factors that is present:
- High-risk surgery: intraperitoneal, intrathoracic, or suprainguinal vascular procedures.
- History of ischemic heart disease: prior myocardial infarction, a positive exercise test, current chest pain considered due to ischemia, use of nitrate therapy, or ECG changes consistent with prior infarction.
- History of congestive heart failure: prior pulmonary edema, paroxysmal nocturnal dyspnea, bilateral rales or S3 gallop, or a chest x-ray showing pulmonary vascular redistribution.
- History of cerebrovascular disease: prior stroke or transient ischemic attack.
- Insulin-treated diabetes mellitus: diabetes managed with preoperative insulin therapy.
- Preoperative renal impairment: a serum creatinine above 2.0 mg/dL (177 micromol/L).
Summing the six points gives a total score from 0 to 6, which maps to four risk classes.
Interpreting the result
In the original 1999 derivation cohort, approximate rates of a major cardiac event were about 0.4% for Class I (0 points), 0.9% for Class II (1 point), 6.6% for Class III (2 points), and 11% for Class IV (3 or more points). These figures describe the group each class came from, not a guarantee for any one patient, and many institutions now pair the RCRI with newer tools (such as the ACS NSQIP surgical risk calculator) for a fuller preoperative picture.
When to consult a professional
This tool performs the standard RCRI arithmetic for education and preoperative planning. It is not a diagnosis and does not replace a full anesthesia or cardiology assessment. Any decision about proceeding with surgery, further cardiac testing, or perioperative medication management should involve the treating surgical and anesthesia team.