Prehospital 12-lead ECG: efficacy or effectiveness?

Area of Science:

• Cardiology
• Emergency Medicine
• Healthcare Systems Analysis

Background:

• Prehospital 12-lead ECGs are known to decrease reperfusion times in ST-segment elevation myocardial infarction (STEMI) patients.
• Optimizing emergency medical services (EMS) protocols is crucial for timely STEMI treatment.

Purpose of the Study:

• To compare the time to ECG, angioplasty suite, and reperfusion in EMS STEMI patients across three distinct care processes.
• To evaluate the impact of prehospital ECGs and early hospital activation on STEMI patient outcomes.

Main Methods:

• Retrospective analysis of STEMI patients transported by EMS from January 2003 to October 2005.
• Comparison of three care pathways: EMS transport alone, EMS ECG with ED evaluation, and pre-ED arrival AMI team activation.
• Time intervals measured from ED arrival to laboratory and reperfusion; performance targets assessed.

Main Results:

• Patients with pre-arrival AMI team activation had significantly shorter times to the angioplasty suite (24.3 vs. 53.4 min) and reperfusion (70.4 vs. 96.3 min) compared to other groups.
• Pre-arrival activation significantly improved meeting performance targets for laboratory (96.7% vs. 73.7%) and reperfusion (85.2% vs. 51.0%).
• EMS ECGs without pre-arrival activation did not show a significant difference in time to laboratory or reperfusion compared to EMS transport alone.

Conclusions:

• Integrating EMS ECGs with hospital resource activation systems significantly decreases time to reperfusion for STEMI patients.
• EMS ECGs alone, without early hospital activation, do not improve critical time intervals.
• System-level improvements focusing on pre-arrival activation are essential for optimizing STEMI care pathways.