Chronic Coronary Occlusion Ñ Treatment Options and Results
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Published on: March 27, 2018
1Professor and Head of Cardiology, 3010, Bern, Switzerland.
Insights
Angioplasty for chronic coronary occlusions has a 60% success rate, improving symptoms and avoiding bypass surgery. While recurrences are common, techniques like the Magnum wire aim to enhance safety and effectiveness.
Area of Science:
- Cardiology
- Interventional Cardiology
Background:
- Chronic total occlusions (CTOs) are a significant challenge in coronary artery disease management.
- CTOs often lead to the selection of coronary artery bypass grafting (CABG) over angioplasty.
- Current angioplasty success rates for CTOs are around 60%, with potential for symptom improvement and avoiding CABG.
Purpose of the Study:
- To evaluate the indications, success rates, benefits, and complications of angioplasty for chronic coronary occlusions.
- To explore techniques aimed at improving angioplasty success rates for CTOs, balancing efficacy and safety.
Main Methods:
- Review of indications for chronic coronary occlusion angioplasty based on projected benefit and technical difficulty.
- Analysis of success rates and complication profiles of current angioplasty techniques.
- Evaluation of specific devices, such as the Magnum wire, in CTO angioplasty procedures.
Main Results:
- Primary success rates for CTO angioplasty are approximately 60%, with rare complications.
- Successful angioplasty improves symptoms, potentially obviates the need for CABG, and may improve left ventricular function.
- The Magnum wire demonstrated a 64-66% success rate in approximately 800 cases, with comparable complications to routine angioplasty.
Conclusions:
- Angioplasty for CTOs offers clinical benefits but technical success requires improvement.
- Safety must not be compromised, and the investment in time and materials should be considered given the clinical yield.
- Further advancements in angioplasty techniques are needed to improve outcomes for CTO patients.
Abstract:
Indications for chronic coronary occlusion angioplasty are based on the projected benefit and technical difficulties. With current indications, primary success is around 60% and complications are rare. In successful cases, the main benefits are improvement of symptoms and obviation of the need for bypass surgery. Late improvement of left ventricular function can also occur. Recurrences are frequent, but reocclusions occur only in about 20% of cases. Several techniques have been advocated to improve the success rate. It is obvious that the stiffer the instrument used the higher the crossing rate, but also the risk for perforation. While the laser wire aims at high crossing success, the Magnum wire aims at high safety. In about 800 cases using the Magnum wire, the success rate was 64% before, and 66% after crossover to another technique. Complications were comparable to those of routine coronary angioplasty. Chronic total occlusions are a major reason for selecting bypass surgery over angioplasty. The technical success with angioplasty leaves room for improvement. However, safety should not be compromised and there are limits to the investment in terms of time and material because the clinical yield is relatively small, albeit uncontested.
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