A New Index for Pre-Operative Cardiovascular Evaluation

Area of Science:

• Cardiology
• Surgical Risk Assessment
• Health Informatics

Background:

• Existing pre-operative cardiovascular evaluation indices are either too complex or lack sufficient discriminatory power.
• There is a need for a simple yet effective tool to stratify cardiovascular risk in patients undergoing noncardiac surgery.

Purpose of the Study:

• To prospectively derive and validate a simple, powerful index for stratifying cardiovascular risk in patients undergoing noncardiac surgery.

Main Methods:

• A derivation cohort of 3,284 patients and a validation cohort of 1,167,414 patients were used.
• The primary outcome was death, myocardial infarction, or stroke within 30 days post-surgery.
• Multivariate logistic regression identified 6 key predictors for the Cardiovascular Risk Index (CVRI).

Main Results:

• The CVRI incorporates age ≥75, history of heart disease, angina/dyspnea symptoms, hemoglobin <12 mg/dl, vascular surgery, and emergency surgery.
• The incidence of the primary outcome increased significantly with higher CVRI scores in both cohorts (p < 0.0001).
• The CVRI demonstrated strong discriminatory power with an AUC of 0.90 (derivation) and 0.82 (validation).

Conclusions:

• A new, simple, and powerful Cardiovascular Risk Index (CVRI) has been developed and validated.
• The CVRI effectively stratifies patients into low, intermediate, and high-risk groups for pre-operative cardiovascular events.
• This index has significant implications for efficient patient triage and management in noncardiac surgery settings.