Regional STEMI Network Guidelines

1. Network Structure and Core Infrastructure

• All communities should establish and maintain a regional STEMI network that integrates pre‑hospital and hospital care to shorten total ischemic time and lower mortality. 1
• The network must comprise 24/7 PCI‑capable centers and non‑PCI hospitals linked by standardized transfer protocols. 4
• A central triage system should coordinate every STEMI activation across EMS agencies and hospitals. 5

2. Pre‑Hospital System Requirements

• EMS must obtain and interpret a 12‑lead ECG within 10 minutes of first medical contact and activate the catheterization laboratory immediately; this step is the most critical determinant of timely reperfusion. 4
• EMS personnel (physicians and paramedics) require dedicated training in STEMI diagnosis, triage algorithms, and direct communication with receiving hospitals. 5
• When the anticipated first‑medical‑contact‑to‑device (FMC‑to‑device) time exceeds 120 minutes, pre‑hospital fibrinolysis capability should be available. 4
• EMS should bypass non‑PCI hospitals and transport patients directly to PCI‑capable centers whenever the 120‑minute window can be met. 1
• Real‑time cath‑lab activation by EMS before hospital arrival is mandatory to avoid delays. 1

3. Hospital Network Architecture

3.1 PCI‑Capable Centers

• Provide 24‑hour, 7‑day primary PCI staffed by operators performing ≥75 PCI procedures/year and high‑volume centers completing ≥36 primary PCI cases/year. 5
• Ensure direct catheterization‑lab access that bypasses the emergency department and intensive care unit. 4
• Achieve door‑to‑balloon ≤90 minutes for patients presenting directly and FMC‑to‑device ≤120 minutes for transferred patients. 1
• Maintain cardiac surgical backup for mechanical complications; on‑site surgery is optional if rapid transfer protocols exist. 1

3.2 Non‑PCI Hospitals

• Obtain a door‑to‑ECG ≤10 minutes and make an immediate STEMI diagnosis. 4
• Deliver door‑to‑needle ≤30 minutes for fibrinolysis when transfer to a PCI center would exceed 120 minutes. 4
• Complete door‑in‑door‑out ≤30 minutes for prompt transfer to a PCI‑capable facility. 1
• Initiate standardized antithrombotic therapy (aspirin, P2Y12 inhibitor, anticoagulation) before transfer. 4

4. Reperfusion Decision Algorithms

• Symptom onset ≤3 hours: Primary PCI and fibrinolysis have comparable mortality if fibrinolysis is administered within 2–3 hours of symptom onset. 5

  • If FMC‑to‑device ≤120 minutes, proceed with primary PCI. 4
  • If FMC‑to‑device >120 minutes, give fibrinolysis within 10 minutes, then arrange transfer for angiography 3–24 hours later. 4

• Symptom onset 3–12 hours: Primary PCI is superior to fibrinolysis for mortality and reinfarction; therefore, primary PCI is mandatory regardless of anticipated delays. 5

  • Fibrinolysis may be used only when primary PCI is absolutely impossible (e.g., extreme geographic isolation). 4

• Absolute indications for immediate primary PCI (any time):

  • Cardiogenic shock or acute severe heart failure. 4
  • Contra‑indications to fibrinolysis (active bleeding, recent stroke, recent surgery). 4
  • Failed fibrinolysis (≤50 % ST‑segment resolution at 60–90 minutes). 4
  • Resuscitated cardiac arrest with ST‑elevation on post‑resuscitation ECG. 4

5. Quality Monitoring and Continuous Improvement

• Networks must collect and publicly report standardized quality metrics to enable audit and improvement. 4

Mandatory Performance Metrics

• Real‑time tracking of all time intervals from symptom onset through reperfusion is required. 1
• Monthly benchmarking reports to all network participants must be generated against national standards. 2
• Root‑cause analysis of any case exceeding time targets should be performed. 2
• Annual review of mortality, reinfarction, and bleeding outcomes stratified by reperfusion strategy is mandated. 5

6. Governance and Stakeholder Engagement

• Formal agreements among hospitals, EMS agencies, regional public‑health departments, and local governments are essential for network operation. 1
• A designated medical director with authority to modify protocols based on performance data should be appointed. 2
• Quarterly multidisciplinary meetings (EMS, emergency physicians, interventional cardiologists, administrators) must be held to review performance and address issues. 2
• Participation in national quality programs (e.g., Mission: Lifeline, D2B Alliance) provides benchmarking data and best‑practice resources. 2

7. Common Pitfalls and Mitigation Strategies

• Overreliance on primary PCI when FMC‑to‑device >120 minutes leads to worse outcomes than immediate fibrinolysis; strict time‑based algorithms are required. 4
• The Vienna STEMI Registry showed that enforcing such algorithms increased primary PCI use from 16 % to 60 % and reduced mortality despite a drop in fibrinolysis use. 5
• Avoid the “PCI at any cost” mindset: fibrinolysis administered within 3 hours is equivalent to delayed PCI. 5
• Do not allow emergency‑department evaluation to delay cath‑lab activation; EMS must activate the lab directly. 4
• Non‑culprit vessel PCI during the acute procedure should be limited to patients in cardiogenic shock. 4
• Routine thrombus aspiration or deferred stenting does not improve outcomes and may cause harm; these practices should be avoided. 4
• Comprehensive mapping of all possible patient presentation routes is required to eliminate gaps where patients could fall outside coordinated protocols. 1