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Improved survival after coronary artery surgery in patients with extensive coronary artery disease
Insights
Coronary artery bypass surgery significantly improves survival for patients with severe coronary artery disease. Surgical intervention offers a better prognosis compared to non-operative management in high-risk individuals.
Area of Science:
- Cardiology
- Cardiac Surgery
- Vascular Medicine
Background:
- Survival in ischemic heart disease correlates with coronary artery obstruction severity.
- Coronary artery bypass surgery (CABS) is a treatment option for severe coronary artery disease.
Purpose of the Study:
- To evaluate the impact of CABS on survival rates in patients with severe coronary artery disease.
- To compare survival outcomes between surgically treated and non-operated patients with significant coronary obstructions.
Main Methods:
- Analysis of 149 consecutive patients undergoing CABS between 1971 and 1974.
- Coronary angiograms were scored using the Friesinger, Page, and Ross method.
- Life-table techniques were used to analyze cumulative survival rates.
Main Results:
- Overall operative mortality was 0.7%, with a total mortality of 2.7%.
- Among 80 surgically treated patients with high coronary obstruction scores (≥10), 3-year survival was 98%.
- In contrast, 47 non-operated patients with similar scores had a 3-year survival of 68%.
Conclusions:
- Coronary artery bypass surgery appears to favorably influence prognosis in patients with severe coronary artery disease.
- The study suggests CABS may improve long-term survival in selected high-risk patients.
- Despite differences in patient demographics and urgency, surgical intervention showed superior survival outcomes.
Abstract:
Survival in patients with ischemic heart disease is closely related to the extent of coronary artery obstruction as determined angiographically. One hundred forty-nine consecutive patients underwent coronary artery bypass surgery from November, 1971, to October, 1974. There were 2 late cardiac deaths, 1 late noncardiac death, and 1 hospital death, an operative mortality rate of 0.7 per cent and a total mortality rate of 2.7 per cent. Coronary angiograms were scored according to the method of Friesinger, Page, and Ross. Fifty-four per cent (80/149) had scores of 10 or greater. Cumulative survival was analyzed according to life-table techniques; in the 80 surgically managed patients with scores of 10 or greater, survival at 3 years was 98 per cent. Friesinger's 47 nonoperated patients with similar angiographic scores had a 3 year cumulative survival of 68 per cent. Although this study compares different groups, the surgical series was composed of older patients (mean age 52 as compared to 44 years), includes 22 patients operated on urgently for preinfarction angina pectoris, and includes 18 patients with abnormal ventricular function. These data suggest that coronary artery bypass surgery can favorably influence prognosis in patients with severe coronary artery disease.