Immediate PTCA after successful thrombolysis with intracoronary streptokinase, three years follow-up. A matched pair...

Area of Science:

• Cardiology
• Interventional Cardiology
• Acute Myocardial Infarction Research

Background:

• Early reperfusion is critical for patients with acute myocardial infarction (AMI).
• Thrombolysis with streptokinase is a common reperfusion strategy.
• The role of immediate percutaneous transluminal coronary angioplasty (PTCA) after successful thrombolysis requires further clarification.

Purpose of the Study:

• To compare the effects of immediate PTCA versus thrombolysis alone in patients with residual stenosis after AMI reperfusion.
• To evaluate the impact of PTCA on infarct size, left ventricular function, and long-term clinical outcomes.

Main Methods:

• A multicentre randomized trial involving 533 patients with AMI.
• 46 patients underwent immediate PTCA following thrombolysis with streptokinase.
• Matched-pair analysis compared 36 pairs of patients receiving PTCA versus thrombolysis alone, controlling for key clinical variables.

Main Results:

• Immediate PTCA did not significantly limit infarct size or further preserve left ventricular function compared to thrombolysis alone.
• The reinfarction rate at three-year follow-up was significantly lower in the PTCA group (14%) versus the thrombolysis-alone group (30%; P=0.05).
• Patients undergoing PTCA experienced longer symptom-free periods (128/156 weeks) compared to those receiving thrombolysis alone (102/156 weeks; P=0.03).

Conclusions:

• Immediate PTCA following streptokinase thrombolysis in AMI patients with significant residual stenosis may prevent recurrent ischemia and reinfarction.
• While not impacting infarct size or LV function, PTCA improved long-term clinical outcomes and reduced angina/heart failure episodes.
• Further research is needed to define optimal indications and timing for PTCA after thrombolysis.