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Prophylactic coronary artery grafting in patients with few or no symptoms
Insights
Prophylactic coronary artery grafting offers limited benefit for angina relief in most patients. However, it may improve longevity for those asymptomatic after myocardial infarction (MI).
Area of Science:
- Cardiovascular Surgery
- Interventional Cardiology
- Clinical Outcomes Research
Background:
- Prophylactic coronary artery grafting is performed to prevent future cardiac events.
- The long-term efficacy and benefits of this procedure require further investigation.
Purpose of the Study:
- To evaluate the long-term outcomes of prophylactic coronary artery grafting.
- To assess the impact of prophylactic revascularization on angina symptoms and survival.
Main Methods:
- Retrospective study following 55 patients who underwent prophylactic coronary artery grafting.
- Follow-up duration ranged from 4 to 8 years.
- Data collected included angina status, vessel disease severity, graft patency, and mortality.
Main Results:
- No operative deaths occurred; however, 2 patients had perioperative myocardial infarction (MI).
- Graft occlusion was observed early and up to 5 years post-operation.
- Late follow-up showed 60.8% of survivors were free from angina, but 4 late deaths (3 cardiac-related) and 7 late MIs occurred.
Conclusions:
- Prophylactic coronary artery grafting provides minimal benefit for angina relief in this patient cohort.
- The procedure may potentially increase longevity in patients who remain asymptomatic after MI.
Abstract:
Fifty-five patients who underwent prophylactic coronary artery grafting were followed for 4 to 8 years. Sixteen patients had no angina, and 39 were in New York Heart Association Functional Class I. Twenty-one patients had single-vessel disease, 13 had double-vessel disease, and 27, triple-vessel disease. A total of 101 grafts were inserted. There were no operative deaths. Two patients suffered a perioperative myocardial infarction (MI), and 3 were reoperated on for persistent bleeding. Early after operation, 9 of the 45 grafts were occluded. At 1 year, 2 patients had occlusion of all grafts, and 1 had similar findings at 5 years. There were 4 late deaths, 3 related to coronary artery disease. Seven patients sustained a late MI. Thirty-one of the 51 survivors (60.8%) seen late (mean, 69.3 months) after operation were free from angina; 14 were in Class I and 6, Class II. It is apparent from this retrospective study that patients such as these stand to benefit little from prophylactic revascularization. Longevity may be increased, however, in patients who are asymptomatic after MI.