ATCEMS Performance Dashboard > ACS Patients Given Aspirin > Performance Measure Definition: Aspirin Administration in Acute Coronary Syndrome
Performance Measure Definition: Aspirin Administration in Acute Coronary Syndrome

Description: This is the percentage of patients assessed by EMS providers that present with symptoms of Acute Coronary Syndrome (ACS) that receive aspirin (ASA).
Desired Outcome: All patients exhibiting signs of Acute Coronary Syndrome receive aspirin before arrival at the hospital, when not contraindicated.
Relevance: Research has shown that early aspirin administration is beneficial in patients with ACS.
Measure Domain: Clinical care
Type of Measure: Process

Operational Specifications
Formula Description: Count of patients meeting ACS criteria who are documented as receiving aspirin as an intervention when indicated, divided by the count of all patients meeting ACS criteria.
The resulting measure is expressed as a percentage.
Unit of Analysis: Patient contact
  • Numerator: ACS patients who receive aspirin
  • Denominator: All ACS patients
Measure Frequency: Quarterly
Minimum Population/Sample: None
Performance Standard: Administer aspirin to at least 95 percent of patients who present with Acute Coronary Syndrome (ACS) each quarter.
Acceptable Quality Level: Performance may not fall below 87% for more than two consecutive quarters or any three quarters in a year.
Interval Description: Not applicable
Reporting Value: The percentage of patients meeting ACS criteria to whom aspirin is administered, as defined in the applicable version of the Austin-Travis County Emergency Medical System Clinical Operating Guidelines
Aggregation: Aggregate patients based on date/time of phone pickup in Communications Center for incident.
Stratification: None
Limitations: None
Related Measures:
  • Aspirin Administration for STEMI Alerts: This measure is generally similar to the CPI measure, but is limited to STEMI Alert patients. The STEMI Alert indicator includes patients for whom aspirin administration is contraindicated in its calculations. Patients who receive ASA when it is contraindicated are included in “inappropriate treatment;” patients for whom ASA is appropriately withheld are included in “appropriate treatment.” The net result of these changes is that the patient contact counts for the STEMI Alert measure will be smaller, and performance results will vary from the CPI results.
Notes: None

ATCEMS Open Performance Dashboard
City of Austin Open Data Portal
Travis County Performance Dashboard 

Office of the Medical Director, Austin/Travis County EMS System (2014). “Clinical Performance Indicator 4.5: Aspirin Administration in ACS Patients.”
Office of the Medical Director, Austin/Travis County EMS System (2016). “Clinical Operating Guideline C-01: Chest Pain, Suspected Acute Coronary Syndrome.” Austin-Travis County Emergency Medical Service System Clinical Operating Guidelines version 021716.

Development Status: Actively Reporting
Definition Version: Version D
Revision Date: 2017-01-26
Revised By: David Andersen