Chest pain presenting to the Emergency Department--to stratify risk with GRACE or TIMI?

Area of Science:

• Cardiology
• Emergency Medicine
• Clinical Risk Stratification

Background:

• Undifferentiated chest pain in the Emergency Department (ED) requires rapid risk stratification.
• Existing scoring systems like Global Registry of Acute Coronary Events (GRACE) and Thrombolysis in Myocardial Infarction (TIMI) are validated in cardiac units.
• The utility of these scores in the ED setting for undifferentiated chest pain is not fully established.

Purpose of the Study:

• To evaluate the accuracy of the GRACE score in predicting adverse outcomes for patients with undifferentiated chest pain in the ED.
• To compare the performance of the GRACE score against the TIMI score for risk stratification in this patient population.
• To determine if GRACE is preferential to TIMI in the ED setting.

Main Methods:

• A descriptive study of 1000 consecutive ED patients presenting with undifferentiated chest pain.
• Calculation of GRACE and TIMI scores for each patient.
• Assessment of 30-day outcomes including myocardial infarction, cardiac arrest, revascularization, unstable angina, and all-cause mortality.
• Comparison of score accuracy using receiver operator characteristic curves (AUC-ROC).

Main Results:

• The GRACE score demonstrated accurate risk stratification in the ED cohort (AUC-ROC 0.80).
• The TIMI score showed similar accuracy (AUC-ROC 0.79).
• Complete GRACE score data was available for only 76% of patients due to routine data collection limitations in the ED.

Conclusions:

• Both GRACE and TIMI scores are effective for risk stratification in ED patients with undifferentiated chest pain.
• The TIMI score may be the preferred method in the ED setting due to its simplicity compared to the GRACE score.
• The GRACE score's complexity and data requirements may limit its routine use in the ED.