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Aorta-coronary artery saphenous vein bypass surgery: clinical and angiographic results
Insights
Coronary artery bypass surgery significantly improves angina relief, with complete revascularization leading to better patient outcomes and fewer symptoms. This study highlights the importance of successful graft patency for long-term recovery.
Area of Science:
- Cardiovascular Surgery
- Cardiac Surgery Outcomes
- Coronary Artery Disease Management
Background:
- Aorta-coronary artery bypass surgery is a common procedure for coronary artery disease.
- Assessing the long-term efficacy and patient outcomes following this surgery is crucial.
Purpose of the Study:
- To evaluate the operative mortality, morbidity, and long-term clinical outcomes of patients undergoing aorta-coronary artery saphenous vein bypass surgery.
- To determine the relationship between graft patency, completeness of myocardial revascularization, and patient clinical response.
Main Methods:
- Retrospective analysis of 500 consecutive patients undergoing aorta-coronary artery saphenous vein bypass surgery.
- Follow-up assessment of mortality, angina relief, and functional status.
- Postoperative graft angiography and exercise treadmill testing in a subset of patients.
Main Results:
- Operative mortality was 2.5%, with higher rates for three-vessel disease.
- 13% experienced myocardial infarction within 30 days, contributing to 10 of 16 early deaths.
- Among long-term survivors, 65% reported complete angina relief.
- A strong positive correlation was observed between complete myocardial revascularization and favorable clinical and exercise test responses.
Conclusions:
- Aorta-coronary artery bypass surgery demonstrates acceptable operative mortality and significant long-term benefits in angina relief.
- Completeness of myocardial revascularization, confirmed by patent grafts, is strongly associated with improved clinical outcomes and functional recovery.
Abstract:
In a series of 500 consecutive patients undergoing aorta-coronary artery saphenous vein bypass surgery, operative mortality was 2.5% (1% with one-vessel disease, 2% with two-vessel disease, and 3% with three-vessel disease). Transmural myocardial infarction occurred within 30 days after operation in 67 cases (13%) and caused 10 of the 16 deaths in that period. Among 484 patients followed 1 to 58 months (median, 26 months), there have been 20 deaths. Of the 464 survivors, 65% had complete relief of angina, 24% were improved, and 11% were unimproved. In 162 patients who underwent postoperative graft angiography between 1 and 42 months after surgery, a strong positive relationship existed between clinical response and completeness of myocardial revascularization as defined by the presence of a patent graft to all major coronary arteries with greater than 50% stenosis. A similar relationship was found between postoperative multistage treadmill exercise response and completeness of myocardial revascularization. Thus, 82% of patients completely revascularized were asymptomatic at the time of postoperative graft visualization, and 91% had a negative treadmill exercise response.