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Repeat coronary artery bypass grafting
1Department of Cardiothoracic Surgery, Rigshospitalet, Copenhagen, Denmark.
Insights
Repeat coronary artery bypass grafting (CABG) can be a viable option for patients with recurring angina. While associated with higher risks than initial CABG, it offers significant symptom relief and survival benefits.
Area of Science:
- Cardiovascular Surgery
- Cardiac Surgery Outcomes
- Coronary Artery Disease Management
Background:
- Recurrent angina pectoris after initial coronary artery bypass grafting (CABG) necessitates further intervention.
- Graft failure and progression of native coronary atherosclerosis are primary causes of angina recurrence post-CABG.
Purpose of the Study:
- To evaluate the outcomes of repeat coronary artery bypass grafting in patients experiencing recurrent angina.
- To assess the safety, efficacy, and long-term survival following repeat CABG.
Main Methods:
- A cohort of 52 patients (42 men, 10 women) underwent repeat CABG between 1981-1989.
- Patient data including causes of graft failure, operative complications, mortality, survival rates, and symptom relief were analyzed.
Main Results:
- The 30-day mortality rate was 3.8%.
- Long-term survival at an average of 2.5 years was 92.3%.
- Complete angina relief occurred in 48% of patients, with partial relief in 35%.
Conclusions:
- Repeat CABG, despite increased risks compared to primary surgery, can be a beneficial treatment for recurrent angina.
- The procedure offers significant symptom relief and favorable long-term survival rates for carefully selected patients.
Abstract:
In 1981-1989 we performed repeat coronary artery bypass grafting on 42 men and 10 women (mean age 55 years) with angina pectoris recurring on average 27 months after the primary operation. The cause was occlusion or stenosis of vein grafts alone (59%) or in combination with progression of native coronary atherosclerosis (31%) or progression in the native circulation without graft failure (10%). Complications at the repeat operation included five lesions of the right ventricle and five lesions of patient grafts. The 30-day mortality was 3.8% (95% confidence limits 0.5-13.2%). Survival after observation averaging 2 1/2 years was 92.3% (95% confidence limits 81.5-97.9%). Angina pectoris was completely relieved after the operation in 48% of the patients, lessened in 35% and unchanged in 17%. Although repeat coronary artery bypass grafting carries heightened mortality and morbidity, and the results are less satisfactory than after first-time bypass, the operation can be worthwhile.