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Left main coronary artery obstruction: surgical experience with 93 patients
Insights
Left main coronary artery stenosis is serious, but revascularization procedures show improved outcomes. Mortality and infarction rates decreased significantly after mid-1985, indicating effective treatment for this high-risk heart condition.
Area of Science:
- Cardiology
- Vascular Surgery
- Cardiac Surgery
Background:
- Left main stem coronary artery stenosis presents a grave prognosis in ischemic heart disease patients.
- Prompt intervention is crucial for managing this critical condition.
Purpose of the Study:
- To evaluate the outcomes of left main coronary artery revascularization procedures.
- To assess changes in mortality and perioperative infarction rates over time.
Main Methods:
- Retrospective analysis of 93 patients undergoing left main coronary artery revascularization from August 1982 to February 1989.
- Data collected on patient demographics, coronary artery disease extent, procedural details, and outcomes.
- Comparison of outcomes before and after mid-1985.
Main Results:
- Overall hospital mortality was 6.5% and perioperative infarction rate was 8.6%.
- After mid-1985, hospital mortality decreased to 3.7% and perioperative infarction to 4.9%.
- Average of 3.5 grafts per patient; 5 patients required intra-aortic balloon pump support.
Conclusions:
- Left main coronary artery revascularization is associated with acceptable outcomes, with significant improvements observed over time.
- The procedure effectively manages severe left main coronary artery stenosis, leading to improved survival and reduced complications.
- Long-term follow-up indicates a majority of patients remain alive and in good functional class (NYHA Class I or II).
Abstract:
Among patients with ischemic heart disease, those with left main stem coronary artery stenosis has attracted most attention due to their ominous prognosis. During the period from August 1982 to February 1989, 93 patients underwent left main coronary artery revascularisation procedures at Singapore General Hospital. All the patients had greater than 75% obstruction of the left main coronary artery. Significant triple vessel disease occurred in 35 patients (37.6%), double vessel disease in 32 patients (34.4%), single vessel disease in 21 patients (22.6%) and left main coronary as an isolated lesion in 5 patients (5.4%). The overall hospital mortality rate is 6.5% and perioperative infarction rate is 8.6%. Since mid-1985, the hospital mortality rate has been reduced to 3.7% and the perioperative infarction rate to 4.9%. Average grafts per patient was 3.5. Intra-aortic balloon pump was used in 5 patients. Follow up period was from 5 months to 84 months with a mean of 36 months with the majority of patients in either New York Heart Association Class I or II and still alive.