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Stent implantation in acute myocardial infarction
E Garcia-Cantu1, C Spaulding, T Corcos
1Hôpital Cochin, Université René Descartes, Paris.
Insights
Coronary angioplasty with stent implantation is safe and effective during acute myocardial infarction (AMI). This study shows high success rates and low complications, suggesting stenting is beneficial for AMI patients.
Area of Science:
- Interventional Cardiology
- Cardiovascular Medicine
- Acute Myocardial Infarction Treatment
Background:
- Acute myocardial infarction (AMI) management traditionally involves thrombolysis or angioplasty.
- The role of coronary stent implantation during AMI requires further evaluation regarding safety and efficacy.
- Assessing outcomes of patients undergoing angioplasty with stent implantation for AMI is crucial.
Purpose of the Study:
- To evaluate the safety and efficacy of coronary stent implantation in patients experiencing acute myocardial infarction (AMI).
- To determine the success rate, complications, and in-hospital outcomes associated with stenting during AMI.
- To assess the feasibility of using coronary stents as a primary or adjunctive therapy in AMI.
Main Methods:
- Retrospective analysis of 138 patients treated with coronary angioplasty during AMI.
- 35 patients underwent stent implantation, with data collected on demographics, infarct characteristics, and procedural details.
- Outcomes assessed included procedural success, residual stenosis, in-hospital complications, and 1-month follow-up with repeat angiography.
Main Results:
- Stent implantation was performed in 35% of AMI patients, with indications including dissection and suboptimal results.
- High procedural success rate (96%) with low residual diameter stenosis (4% +/- 7%) was observed.
- Low incidence of in-hospital complications (6% groin hematomas) and no stent occlusion on repeat angiography were noted.
Conclusions:
- Coronary stent implantation is a safe and effective procedure during acute myocardial infarction (AMI).
- Benefits include high success rates, low residual stenosis, and reduced in-hospital recurrent ischemia.
- Stenting should be considered in AMI management, though long-term restenosis rates require further study.
Abstract:
Among 138 patients treated with coronary angioplasty during acute myocardial infarction (AMI), 35 (25%) had stent implantation. Mean age was 56 years and 83% were men. Mean onset of chest pain was 6.0 +/- 5.3 hours, and previous thrombolytic therapy was given to 10 patients (29%). Infarct location was anterior in 19 (54%), inferior in 14 (40%), and lateral in 2 patients (6%). Thrombolysis in Myocardial Infarction trial flows 0,1, and 2 were seen in 24 (69%), 6 (17%), and 5 patients (14%), respectively. The culprit vessel was the left anterior descending artery in 18 (51%), right coronary artery in 14 (40%), left circumflex in 2 (6%), and left main coronary artery in 1 patient (3%). Mean vessel diameter was 3.3 +/- 0.3 mm. Indications were: primary in 5 (14%), suboptimal result in 8 (23%), nonocclusive dissection in 14 (40%), and occlusive dissection in 8 patients (23%). Angiographic thrombus after initial angioplasty was present in 12 patients (34%). A total of 46 stents were implanted; mean balloon diameter and pressure were 3.4 +/- 0.4 mm and 15.5 +/- 2.2 atm, respectively. Residual diameter stenosis was 4 +/- 7%. There were 2 deaths; sudden 1, and after elective coronary artery bypass grafting in the other; 2 patients (6%) had groin hematomas. Mean hospitalization was 9.9 +/- 5.0 days. Repeat angiography revealed no stent occlusion. With initial intravenous heparin for 3 to 7 days, all patients received aspirin and ticlopidine for 1 month. Thus, AMI is not a contraindication for stent implantation. The benefits of stenting are a high success rte, low residual diameter stenosis, and low incidence of in-hospital recurrent ischemia. Reduction in restenosis rate in this setting is likely but remains to be determined.