Clinical impact of direct referral to primary percutaneous coronary intervention following pre-hospital diagnosis of...

Area of Science:

• Cardiology
• Emergency Medicine
• Health Services Research

Background:

• Treatment delay is critical for ST-elevation myocardial infarction (STEMI) survival.
• Primary percutaneous coronary intervention (PCI) is the gold standard for STEMI reperfusion.
• Optimizing referral pathways is essential to minimize delays.

Purpose of the Study:

• To evaluate the effectiveness of pre-hospital STEMI diagnosis with direct PCI referral.
• To compare this strategy against conventional referral routes.
• To assess the impact on treatment delay and patient outcomes.

Main Methods:

• Retrospective analysis of 658 STEMI patients from January 2003 to December 2004.
• Comparison of three referral routes: pre-hospital diagnosis, emergency department diagnosis, and local hospital diagnosis.
• Analysis of treatment delay and in-hospital mortality.

Main Results:

• Pre-hospital diagnosis reduced treatment delay by over 45 minutes (P=0.001).
• No significant difference in overall in-hospital mortality.
• In cardiogenic shock subgroup (n=80), pre-hospital diagnosis halved mortality (P=0.019), with 6.2% mortality for PCI within 2 hours.

Conclusions:

• Pre-hospital STEMI diagnosis and direct PCI referral effectively reduce treatment delays.
• This strategy shows a potential survival benefit for STEMI patients with cardiogenic shock.
• Further investigation into this optimized referral pathway is warranted.