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Coronary Palmaz-Schatz stent implantation in acute myocardial infarction
F J Neumann1, H Walter, G Richardt
1Medizinische Klinik, Technische Universität München, Germany.
Insights
Coronary stenting effectively restored vessel patency in acute myocardial infarction patients. This safe and effective treatment showed a low reocclusion rate, especially with antiplatelet therapy.
Area of Science:
- Cardiology
- Interventional Cardiology
Background:
- Acute myocardial infarction (AMI) management often involves angioplasty.
- Complications like reocclusion or dissection can arise during angioplasty.
- Coronary stenting offers a potential solution for complex cases.
Purpose of the Study:
- To assess the feasibility and outcomes of coronary stenting in AMI.
- To evaluate stenting as a treatment for complicated direct balloon angioplasty.
- To compare outcomes between anticoagulation and antiplatelet therapy post-stenting.
Main Methods:
- Prospective observational study of 80 AMI patients.
- Palmaz-Schatz coronary stents implanted for specific indications (reocclusion, dissection, poor flow).
- Patients received either conventional anticoagulation (50) or antiplatelet therapy (30).
Main Results:
- Coronary stenting achieved 98.8% vessel patency.
- Survival rates were higher in Killip classes I-III patients (95.5%) compared to class IV (71.4%).
- Subacute reocclusion rate was 8.5% (5/59), with no stent thromboses in the ticlopidine group.
Conclusions:
- Coronary stenting is safe and effective for complicated AMI angioplasty.
- The risk of subacute reocclusion is comparable to elective stenting in lower-risk patients.
- Antiplatelet therapy, particularly with ticlopidine, may reduce stent thrombosis.
Objective:
To investigate the feasibility of coronary stenting in acute myocardial infarction.
Design:
Prospective observational study.
Patients:
80 patients undergoing direct balloon angioplasty for acute myocardial infarction who had coronary Palmaz-Schatz stents implanted during a 3 year study period. Indications for stenting were abrupt reocclusion, large dissection with threatened reocclusion, and failure to achieve brisk flow of contrast by angioplasty alone.
Interventions:
After stenting, 50 patients were treated by conventional anticoagulation and 30 patients received antiplatelet therapy with aspirin and ticlopidine.
Main Outcome Measures:
Death and subacute reocclusion within two weeks.
Results:
Coronary stenting fully restored vessel patency in 79 patients (98.8%). 10 of 14 patients with symptoms of Killip class IV on admission were discharged from hospital alive. Three of the 66 patients with symptoms of Killip classes I-III died in hospital. Repeat angiography in 59 of these patients, showed 3 symptomatic and 2 silent reocclusions (reocclusion rate 8.5%). No stent thromboses were detected in patients treated with ticlopidine.
Conclusions:
Coronary stenting is a safe and effective treatment for complicated direct balloon angioplasty in acute myocardial infarction. In patients with symptoms of Killip classes I to III the risk of subacute reocclusion is comparable to that of bail-out stenting after elective balloon angioplasty.