cliot (version 1.0.0)

revised_cardiac_risk_index: Revised Cardiac Risk Index (RCRI) for Pre-Operative Risk

Description

Calculates the Revised Cardiac Risk Index (Lee Index) to estimate the risk of major cardiac complications (myocardial infarction, pulmonary edema, ventricular fibrillation, cardiac arrest, complete heart block) after noncardiac surgery.

Usage

revised_cardiac_risk_index(high_risk_surgery, ischemic_heart_disease,
                           congestive_heart_failure, cerebrovascular_disease,
                           insulin_treatment, preop_creatinine_gt_2)

Value

A list containing:

RCRI_Score

The calculated score (Range 0-6).

Risk_Class

The Lee Risk Class (I, II, III, or IV).

Est_Major_Cardiac_Event_Risk

Estimated probability of a major cardiac event based on the original validation cohort.

Arguments

high_risk_surgery

Numeric (0 or 1). Intraperitoneal, intrathoracic, or suprainguinal vascular surgery. (1 = Yes).

ischemic_heart_disease

Numeric (0 or 1). History of MI, positive exercise test, current chest pain due to ischemia, nitrate use, or pathological Q waves. (1 = Yes).

congestive_heart_failure

Numeric (0 or 1). History of CHF, pulmonary edema, or paroxysmal nocturnal dyspnea. (1 = Yes).

cerebrovascular_disease

Numeric (0 or 1). Prior TIA or stroke. (1 = Yes).

insulin_treatment

Numeric (0 or 1). Pre-operative treatment with insulin. (1 = Yes).

preop_creatinine_gt_2

Numeric (0 or 1). Pre-operative serum creatinine > 2.0 mg/dL (> 176.8 micromol/L). (1 = Yes).

References

Lee TH, Marcantonio ER, Mangione CM, 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. doi:10.1161/01.cir.100.10.1043

Examples

# Example 1: Low Risk
# No risk factors
# Score = 0
revised_cardiac_risk_index(0, 0, 0, 0, 0, 0)

# Example 2: High Risk
# Vascular surgery (+1), Insulin (+1), History of MI (+1)
# Score = 3
revised_cardiac_risk_index(1, 1, 0, 0, 1, 0)