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[Surgical revascularization in stenosis and occlusion of the left main coronary artery]
Insights
Coronary revascularization for left main coronary artery (LMA) stenosis showed a 4.6% hospital mortality and 9.7% perioperative infarct rate. High-risk patients, particularly those with severe LMA stenosis and right coronary artery occlusion, faced increased risks.
Area of Science:
- Cardiovascular Surgery
- Interventional Cardiology
- Cardiac Surgery Outcomes
Context:
- Left main coronary artery (LMA) stenosis is a critical condition requiring surgical intervention.
- Evaluating outcomes of coronary revascularization for LMA disease is essential for patient management.
- The study analyzes a cohort undergoing revascularization between 1975 and 1981.
Purpose:
- To assess the hospital mortality, perioperative infarct incidence, and long-term outcomes of coronary revascularization for significant left main coronary artery (LMA) stenosis or occlusion.
- To identify specific patient subgroups at higher risk for adverse events.
- To evaluate the efficacy and safety of surgical treatment for LMA disease.
Summary:
- 130 patients with LMA stenosis/occlusion underwent revascularization, with 4.6% hospital mortality and 9.7% perioperative infarcts.
- Patients with >90% LMA stenosis and complete right coronary artery occlusion had higher risks (15% mortality, 15% infarcts) compared to others.
- Long-term follow-up showed 4.1% late mortality, with 88% of survivors asymptomatic or with minimal angina; 5-year survival was 84.3%.
Impact:
- Coronary revascularization for LMA disease demonstrates acceptable long-term survival and symptom relief.
- Risk stratification is crucial, identifying patients needing closer monitoring and potentially tailored surgical approaches.
- Findings inform surgical decision-making and risk assessment for patients with complex coronary artery disease.
Abstract:
From 1975 through 1981 130 patients underwent coronary revascularization for significant stenosis or complete occlusion of the left main coronary artery (LMA). Hospital mortality was 4.6%, 3.3% were related to cardiac causes. The incidence of perioperative infarcts was 9.7%; in three fourths of these patients cardiovascular complications (e.g. hypertension, hypotension, arrhythmias) had occurred between start of anesthesia and start of extracorporeal circulation. Patients with a more than 90% LMA stenosis and complete occlusion of the right coronary artery appear to be at a particularly high risk both in terms of mortality and perioperative infarcts as compared to all other LMA-stenosis patients (operative mortality 15% vs. 3.5%, perioperative infarcts 15% vs. 8.8%). 3 patients with complete LMA occlusion did not suffer perioperative infarcts and survived in the long term. Follow-up investigation (mean 28.8 months) revealed late infarcts in 9 patients, 5 of which were lethal (late mortality 4.1%). Of hospital survivors, 88% were entirely asymptomatic or had very little angina pectoris (classes I and II NYHA). Cumulative survival was 84.3% at 5 years.