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Aortocoronary bypass surgery: a 7-year follow-up
Insights
Aortocoronary artery bypass grafts showed a 2.5% operative mortality. Long-term follow-up revealed annual angina recurrence of 3.5% and infarction rates of 1.4%, with survival comparable to the general population.
Area of Science:
- Cardiovascular Surgery
- Cardiac Surgery Outcomes
- Coronary Artery Disease Management
Background:
- Aortocoronary artery bypass grafting (ACBG) is a common surgical intervention for coronary artery disease.
- Long-term outcomes and risk factors influencing survival after ACBG require continued investigation.
Purpose of the Study:
- To evaluate the long-term efficacy and survival rates following aortocoronary artery bypass grafting.
- To identify factors associated with outcomes in patients undergoing ACBG.
Main Methods:
- Prospective follow-up of 748 consecutive patients who underwent ACBG.
- Data collection on operative mortality, angina recurrence, myocardial infarction, and survival.
- Analysis of outcomes based on number of grafts, sex, left main coronary stenosis, and ejection fraction.
Main Results:
- Operative mortality was 2.5% and did not correlate with the number of bypassed vessels.
- Annual rates of angina recurrence and late myocardial infarction were 3.5% and 1.4%, respectively.
- Cumulative survival rates were not influenced by the number of grafts or patient sex, but were affected by left main coronary stenosis and impaired ejection fraction.
Conclusions:
- Aortocoronary artery bypass grafting offers long-term survival rates comparable to the general U.S. population.
- Left main coronary stenosis and reduced ejection fraction are significant predictors of poorer long-term survival after ACBG.
- While angina recurrence and infarction occur, ACBG remains an effective revascularization strategy for select patients.
Abstract:
Follow-up of 748 consecutive patients who underwent aortocoronary artery bypass grafts was obtained for 5 to 94 months (average, 59 months). Operative mortality of 2.5% did not vary with number of vessels bypassed. There was a linear 3.5% annual recurrence rate of angina, and average annual late infarction rate of 1.4%. The cumulative survival rates did not differ for the number of grafts performed or for men and women, but did differ for left main coronary stenosis and impaired ejection fractions. The late cumulative survival rates for the entire group approached those of the general U.S. population.