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[Indications of coronary angioplasty after thrombolysis]
A Vahanian1, E Garbarz, O Nallet
1Service de cardiologie, hôpital Tenon, Paris.
Insights
Thrombolysis is a common treatment for heart attacks, but routine angioplasty after it is not recommended. Angioplasty is best used as a salvage procedure or for specific complications like heart failure.
Area of Science:
- Cardiology
- Interventional Cardiology
- Emergency Medicine
Context:
- Thrombolysis is the primary reperfusion strategy for acute myocardial infarction.
- The role of immediate angioplasty following thrombolysis remains controversial.
- Several randomized trials have investigated the optimal timing and indications for angioplasty post-thrombolysis.
Purpose:
- To review the current evidence regarding the indications for angioplasty after thrombolysis in acute myocardial infarction.
- To discuss the controversies and practical challenges in implementing post-thrombolysis angioplasty strategies.
- To evaluate the efficacy of salvage and secondary angioplasty in specific clinical scenarios.
Summary:
- Systematic immediate angioplasty after intravenous thrombolysis (e.g., with rt-PA) is generally not indicated, as shown by trials like TIMI 2, TAMI, and ECSG.
- Angioplasty is effective as a salvage procedure for failed thrombolysis (supported by the RESCUE trial) and in cases of left ventricular failure or cardiogenic shock.
- Rapid angioplasty for recurrent ischemia improves outcomes, while secondary angioplasty several days later is typically reserved for patients with residual ischemia or positive stress tests.
Impact:
- Current strategies for post-thrombolysis reperfusion are evolving.
- Logistical challenges and limitations in non-invasive reperfusion detection impact clinical practice.
- Future approaches will likely incorporate novel thrombolytic/antithrombotic agents and coronary stents.
Abstract:
Thrombolysis is the most widely used method of coronary reperfusion in the acute phase of myocardial infarction. The indications of angioplasty after thrombolysis have been subject of considerable controversy over the last few years. Three randomised trials (TIMI 2, TAMI, ECSG) have shown that it is not desirable to perform systematic immediate angioplasty after intravenous thrombolysis with rt-PA. Angioplasty may be carried out as a "salvage" procedure in cases of failure of thrombolysis. The validity of this approach was confirmed recently by the "RESCUE" trial in anterior myocardial infarction. The practical application of its results is confronted by logistical problems inherent to the practice of angioplasty in the acute phase of myocardial infarction and to the inadequacy of non-invasive methods for the detection of coronary reperfusion after thrombolysis. Angioplasty may also be necessary in cases of left ventricular failure or cardiogenic shock. The efficacy of a rapid angioplasty in cases of recurrence of ischaemia after thrombolysis has been proved in reducing mortality and preserving left ventricular function. The results of TIMI IIB and SWIFT trials show that secondary angioplasty, several days after thrombolysis, is only usually indicated in patients with residual clinical ischaemia or positive stress tests. This attitude should however be modulated in the light of the "open artery" theory and the limitations of methods of evaluating myocardial viability. The present strategies will no doubt be modified with the introduction of new thrombolytic and/or antithrombotic agents and the use of coronary stents.