Related Experiment Videos
Primary coronary angioplasty in patients with acute myocardial infarction
J J Popma1, Y C Chuang, L F Satler
1Department of Internal Medicine (Cardiology Division), Washington Hospital Center, Washington, DC 20010.
Insights
Primary angioplasty offers an alternative to thrombolytic therapy for acute myocardial infarction, showing high success rates and reduced complications. It may be preferred in specific patient groups with immediate access to a catheterization lab.
Area of Science:
- Cardiology
- Interventional Cardiology
- Acute Myocardial Infarction Management
Background:
- Thrombolytic therapy for acute myocardial infarction (AMI) faces limitations including reperfusion failure, recurrent ischemia, and hemorrhagic complications.
- Primary percutaneous coronary intervention (PCI) presents a potential alternative to overcome these limitations.
Purpose of the Study:
- To review the efficacy and outcomes of primary angioplasty in patients with AMI.
- To provide recommendations for the appropriate use of primary angioplasty in AMI management.
Main Methods:
- A literature review of English-language articles from July 1987 to July 1993, indexed on MEDLINE.
- Inclusion of non-randomized series and randomized trials comparing primary angioplasty with thrombolytic therapy for AMI.
Main Results:
- Non-randomized studies report high procedural success rates (86-99%) and low recurrent ischemia (4%) with primary angioplasty.
- Two randomized trials indicate primary angioplasty leads to lower mortality, less recurrent ischemia, shorter hospital stays, and improved left ventricular function compared to thrombolysis.
- Two other randomized studies showed limited benefits of primary angioplasty on myocardial salvage, recurrent ischemia, or ventricular function.
Conclusions:
- Primary angioplasty is a viable option for AMI, particularly in patients with extensive infarction and rapid access to a catheterization laboratory.
- Consideration for primary angioplasty is recommended for patients with contraindications to thrombolysis, cardiogenic shock, prior bypass surgery, or stuttering chest pain onset.
- Limitations include the need for 24-hour lab availability and experienced personnel; patients with small infarcts, expected delays, or complex coronary anatomy may not be ideal candidates.
Abstract:
In some patients with acute myocardial infarction, thrombolytic therapy may be limited by its failure to reperfuse the occluded artery, by recurrent ischemia (despite initially successful reperfusion), and by major hemorrhagic complications. Primary coronary angioplasty may circumvent these limitations. This article reviews the results of primary angioplasty reported in patients with myocardial infarction and makes recommendations for its use. The review includes pertinent articles found in the English language literature from July 1987 to July 1993 on MEDLINE. Nonrandomized series of primary angioplasty in acute myocardial infarction have demonstrated high procedural success rates (86% to 99%) and infrequent recurrent ischemia (4%). Two randomized trials comparing primary angioplasty and thrombolytic therapy have shown that primary angioplasty results in lower mortality, less recurrent ischemia, shorter length of hospital stay, and improved left ventricular function. Two other randomized studies have shown little benefit from primary angioplasty on myocardial salvage, recurrent ischemia, or ventricular function. One major limitation of primary angioplasty is that it requires 24-hour availability of a catheterization laboratory and experienced surgical personnel. Primary angioplasty may be the preferred approach in patients with extensive myocardial infarction who have immediate (< 120 min) access to a cardiac catheterization laboratory with experienced personnel. Patients having 1) contraindications to thrombolytic therapy, 2) cardiogenic shock, 3) prior coronary bypass surgery, or 4) "stuttering" onset of pain may also benefit from primary angioplasty. Poor candidates for this procedure are those with a small myocardial infarction, those in whom undue delays in access to a cardiac catheterization facility would be expected, or those with complex coronary anatomy, including left main coronary artery disease.