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[Surgical treatment of coronary heart disease]
1Departement Chirurgie, Kantonsspital Basel.
Insights
Coronary surgery aims to relieve symptoms in stable angina and prevent heart attacks in unstable cases. It also treats mechanical complications, with outcomes varying based on patient risk and surgical timing.
Area of Science:
- Cardiovascular Surgery
- Interventional Cardiology
Context:
- Coronary artery disease management involves surgical interventions for various patient groups.
- Stable and unstable angina pectoris present distinct surgical goals: symptom relief versus infarction prevention.
Purpose:
- To outline the indications for coronary artery bypass grafting (CABG) in stable angina, unstable angina, and mechanical infarction complications.
- To detail the prophylactic role of CABG in asymptomatic patients with specific coronary artery disease patterns.
- To present surgical outcomes, including mortality and graft patency rates, for different clinical scenarios.
Summary:
- Coronary surgery addresses stable angina (symptom relief, prognosis), unstable angina (infarction prevention), and mechanical infarction complications (heart failure, shock).
- Prophylactic surgery is recommended for three-vessel disease, left main-stem stenosis, and critical left anterior descending artery stenosis to reduce myocardial infarction risk and improve survival.
- Early surgical mortality has slightly increased due to high-risk patient selection post-percutaneous transluminal coronary angioplasty (PTCA).
- Late mortality is approximately 5% at one year and 25% at ten years.
- Vein graft patency exceeds 90% initially, decreasing by 5% annually; arterial grafts show superior results.
- Surgical mortality for mechanical infarction complications is high (40-50%) in the acute phase, improving significantly (5-10%) in the chronic stage.
Impact:
- Provides critical data on surgical outcomes, guiding clinical decision-making for coronary artery disease.
- Highlights the improved long-term patency of arterial grafts compared to vein grafts.
- Emphasizes the improved survival rates and reduced myocardial infarction risk associated with prophylactic coronary surgery in high-risk patients.
Abstract:
The goal of coronary surgery in stable angina pectoris is relief of symptoms and improvement of prognosis, whereas in unstable angina pectoris the main purpose is the prevention of infarction. In 'mechanical' complications of infarction, surgery is undertaken to treat severe congestive heart failure or cardiogenic shock. Prophylactic operations in asymptomatic patients are generally recommended in three-vessel disease, left main-stem stenosis and critical stenosis of the left anterior descending artery with the purpose to reduce the risk of myocardial infarction and to improve survival. Early surgically mortality was about 1% some years ago, but is actually slightly higher, mainly due to selection of high-risk patients since the introduction of PTCA. Late mortality is about 5% after one year and about 25% after ten years. The early patency rate of vein grafts is more than 90% and decreases about 5% per year, whereas results with arterial grafts are even better. Early surgical mortality in patients with mechanical complications is very high (40 to 50%) in the acute stage of infarction; results in the chronic stage are much better (5 to 10%).