Transfer for primary angioplasty versus immediate thrombolysis in acute myocardial infarction: a meta-analysis

Area of Science:

• Cardiology
• Interventional Cardiology
• Acute Myocardial Infarction Management

Background:

• Primary percutaneous coronary intervention (PCI) is proven effective for acute myocardial infarction (AMI).
• Optimal reperfusion strategy for AMI patients without immediate catheterization access remains debated.
• This study compares transfer for angioplasty versus immediate thrombolysis in AMI.

Purpose of the Study:

• To compare the efficacy of transferring acute myocardial infarction (AMI) patients for primary percutaneous coronary intervention (PCI) versus immediate on-site thrombolysis.
• To synthesize evidence from randomized clinical trials on these two reperfusion strategies.
• To evaluate the combined endpoint of death, reinfarction, and stroke.

Main Methods:

• Meta-analysis of published randomized trials and scientific congress presentations.
• Inclusion of 6 trials with a total of 3750 patients.
• Primary endpoint: Combined criteria (CC) of death/reinfarction/stroke; Relative Risk (RR) used for treatment effect evaluation.

Main Results:

• Transfer for primary PCI significantly reduced the combined endpoint (CC) by 42% (P<0.001) compared to thrombolysis.
• Reinfarction reduced by 68% (P<0.001) and stroke by 56% (P=0.015) with primary PCI.
• A trend towards reduced all-cause mortality (19%, P=0.08) was observed with transfer for PCI.

Conclusions:

• Primary PCI is superior to immediate thrombolysis for acute myocardial infarction (AMI), even necessitating patient transfer.
• Effective ambulance systems, prehospital care, and PCI capacity are crucial for optimal AMI reperfusion therapy.
• This meta-analysis supports the established benefit of primary PCI in AMI management.