Comparison of 4 Cardiac Risk Calculators in Predicting Postoperative Cardiac Complications After Noncardiac...

Area of Science:

• Cardiology
• Perioperative Medicine
• Surgical Risk Assessment

Background:

• Current guidelines recommend Revised Cardiac Risk Index (RCRI), myocardial infarction or cardiac arrest (MICA), and American College of Surgeons-National Surgical Quality Improvement Program (ACS-NSQIP) calculators for risk assessment.
• No published data directly compare the performance of these risk calculators.
• This study addresses the need for comparative data on the predictive accuracy of these tools.

Purpose of the Study:

• To compare the performance of RCRI, MICA, and ACS-NSQIP calculators in predicting postoperative cardiac complications.
• To evaluate the accuracy of these calculators in a cohort undergoing select surgical procedures across various risk categories.
• To assess predictive performance during hospitalization and up to 30 days post-operation.

Main Methods:

• A cohort of 663 patients undergoing select surgical procedures was studied.
• Performance of RCRI, MICA, and ACS-NSQIP calculators was compared.
• Cardiac complications, including myocardial infarction or cardiac arrest, were tracked during hospitalization and 30 days post-operation.

Main Results:

• Overall cardiac complications occurred in 2.1% of patients (14/663), with 11 during hospitalization.
• Myocardial infarction or cardiac arrest occurred in only 0.45% of patients (3/663).
• All calculators performed well within their original study settings but showed reduced accuracy when applied differently; MICA was most reliable for identifying high-risk patients.

Conclusions:

• All evaluated risk calculators are useful for identifying low-risk patients who may not require further cardiac testing.
• The myocardial infarction or cardiac arrest calculator demonstrated the highest reliability in selecting patients at higher risk for cardiac complications.
• Direct comparison of calculators is challenging due to differing risk factors, outcomes, and observation durations.