The Revised Cardiac Risk Index (RCRI), also known as the Lee Index, is a widely used clinical tool to estimate the risk of major cardiac complications (e.g., myocardial infarction, cardiac arrest, or death) in patients undergoing non-cardiac surgery. It helps clinicians identify patients who may benefit from further cardiac evaluation or risk-reduction strategies before surgery.
The RCRI assigns one point for each of six independent predictors. The total score then correlates with the risk of a major cardiac event.
Understanding Your RCRI Score:
The RCRI score categorizes patients into risk classes for major cardiac events (cardiac death, nonfatal myocardial infarction, nonfatal cardiac arrest) within 30 days of non-cardiac surgery:
Class I (0 points): 0.4% risk
Class II (1 point): 0.9% risk
Class III (2 points): 6.6% risk
Class IV (≥3 points): 11.0% risk
Disclaimer: This calculator is for informational purposes only and should not be used as a substitute for professional medical advice, diagnosis, or treatment. Always consult with a qualified healthcare provider for any health concerns or before making any decisions related to your health or treatment.
function calculateRCRI() {
var score = 0;
if (document.getElementById("highRiskSurgery").checked) {
score += 1;
}
if (document.getElementById("ischemicHeartDisease").checked) {
score += 1;
}
if (document.getElementById("congestiveHeartFailure").checked) {
score += 1;
}
if (document.getElementById("cerebrovascularDisease").checked) {
score += 1;
}
if (document.getElementById("diabetesInsulin").checked) {
score += 1;
}
if (document.getElementById("renalInsufficiency").checked) {
score += 1;
}
var riskClass = "";
var riskPercentage = "";
if (score === 0) {
riskClass = "Class I";
riskPercentage = "0.4%";
} else if (score === 1) {
riskClass = "Class II";
riskPercentage = "0.9%";
} else if (score === 2) {
riskClass = "Class III";
riskPercentage = "6.6%";
} else { // score >= 3
riskClass = "Class IV";
riskPercentage = "11.0%";
}
var resultDiv = document.getElementById("rcriResult");
resultDiv.innerHTML = "
Your RCRI Score: " + score + " points
" +
"This corresponds to " + riskClass + " with an estimated risk of major cardiac event of " + riskPercentage + ".";
}