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[Coronary angioplasty in acute coronary syndrome]
L Martínez Elbal1, M Gómez Recio
1Hospital de la Princesa, Madrid.
Insights
Percutaneous Transluminal Coronary Angioplasty (PTCA) after acute myocardial infarction (AMI) or unstable angina (UA) is controversial. Aggressive PTCA strategies do not improve survival and may be harmful; selective use is recommended.
Area of Science:
- Cardiology
- Interventional Cardiology
Context:
- Percutaneous Transluminal Coronary Angioplasty (PTCA) is a common procedure for patients post-acute myocardial infarction (AMI) and unstable angina (UA).
- The optimal timing and indications for PTCA remain debated, particularly following thrombolysis for AMI.
Purpose:
- To evaluate the efficacy and safety of immediate versus selective PTCA strategies after thrombolysis for AMI.
- To determine appropriate indications for coronary arteriography and subsequent PTCA in post-AMI patients.
Summary:
- Recent studies (TAMI, TIMI II, ECSG) indicate that an aggressive, routine invasive strategy post-thrombolysis does not improve survival or ventricular function and may increase harm.
- Emergent coronary arteriography post-AMI should be reserved for hemodynamically unstable patients with ongoing ischemia.
- Elective coronary arteriography is indicated before hospital discharge for patients with spontaneous or provocable ischemia, with PTCA or surgical revascularization considered for significant stenoses.
Impact:
- Findings suggest a shift towards selective, risk-stratified application of PTCA rather than routine invasive intervention after AMI.
- This approach aims to optimize patient outcomes by reserving invasive procedures for those most likely to benefit, potentially reducing complications and healthcare costs.
Abstract:
PTCA is a widely used technique in patients post-acute myocardial infarction (AMI) as well as in unstable angina (UA). The precise timing of its application and some aspects of the indication nowadays remains a matter of controversy. Primary PTCA is not generally considered to be the initial treatment of AMI. In contrast, immediate PTCA after thrombolysis has been proposed attempting to decrease the incidence of early reocclusion, improve myocardial salvage, decrease the incidence of postinfarction angina and improve survival. Nevertheless, three recent controlled studies (TAMI, TIMI II and ECSG) have demonstrated that an "aggressive" strategy with obligatory, invasive intervention following thrombolysis does not provide any advantage in terms of survival, rate of reocclusion or improved ventricular function and is, in fact, likely to be harmful. Emergent coronary arteriography after AMI should be reserved for unstable patients with continued or recurrent ischemia in the CCU. In elective basis it should be indicated in all patients with spontaneous or provocable ischemia prior to hospital discharge. If high grade coronary stenoses are identified, the patient should be considered for PTCA or surgical revascularization. In our own experience with coronary arteriography 24 hours to 15 days after intravenous thrombolysis with SK, PTCA is anatomically feasible in 44% of all the patients and in 60% of those showing a patent vessel. However, when indicated because of postinfarction angina or a positive stress test, PTCA was performed only in 22%, some of them presenting with a totally occluded vessel. In case of stenosis lesser than 100% the dilation success rate is slightly lower than that of out entire series (84% vs 88%), but the incidence of acute occlusion is significantly higher (10% vs 6%), particularly in patients with angiographic evidence of intracoronary thrombi. The incidence of "non-significant" (less than 70%) stenosis spontaneously increases when the coronary arteriography is performed late during hospitalization (34% vs 17% when the patient is studied in the first 24-48 hours).(ABSTRACT TRUNCATED AT 250 WORDS)