Late primary angioplasty (beyond 12 h): are we sure it should be avoided?

Area of Science:

• Cardiology
• Interventional Cardiology
• Acute Coronary Syndromes

Background:

• Management strategies for late-presenting ST-segment elevation myocardial infarction (STEMI) lack definitive evidence.
• Patients presenting late with STEMI represent a heterogeneous group, necessitating individualized treatment approaches.
• Existing data from trials and registries suggest potential benefits of timely reperfusion therapy even in delayed presentations.

Purpose of the Study:

• To review the current evidence and clinical considerations for managing patients with STEMI presenting late.
• To identify key factors influencing the decision-making process for percutaneous coronary intervention (PCI) in this patient population.
• To explore the role of myocardial viability assessment in guiding late PCI in stable patients.

Main Methods:

• Review of randomized clinical trials, mechanistic studies, and contemporary registries.
• Analysis of clinical decision-making factors including hemodynamic/electrical stability and ischemic symptoms.
• Evaluation of myocardial viability and functional testing in stable, late-presenting STEMI patients.

Main Results:

• Evidence suggests a potential benefit of prompt coronary flow restoration in late-presenting STEMI.
• Hemodynamic or electrical instability and ongoing ischemic symptoms strongly favor PCI.
• Myocardial viability assessment can identify stable patients who may benefit from late PCI.

Conclusions:

• The optimal management of late-presenting STEMI requires careful consideration of patient stability and clinical factors.
• Percutaneous coronary intervention (PCI) is indicated in unstable patients or those with ongoing ischemia.
• For stable patients, assessing myocardial viability can guide the decision for late PCI, potentially improving outcomes.