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Reoperation for recurrent angina after aortocoronary bypass surgery
T Janardhan1, J K Ross, D F Shore
1Wessex Regional Cardiothoracic Unit, Southhampton General Hospital, Hamphire, UK.
Insights
Reoperation after coronary artery bypass grafting (CABG) is safe and effective for patients with severe angina. This procedure significantly improves symptoms, with low mortality and complication rates.
Area of Science:
- Cardiovascular Surgery
- Cardiac Surgery Outcomes
- Graft Patency
Background:
- Coronary artery bypass grafting (CABG) is a common procedure for coronary artery disease.
- Some patients require reoperation due to graft failure or disease progression.
- Severe angina (NYHA class III/IV) often necessitates reintervention.
Purpose of the Study:
- To evaluate the safety and efficacy of reoperation in patients who previously underwent CABG.
- To assess outcomes, including mortality, complications, and symptomatic improvement, after repeat CABG.
Main Methods:
- Retrospective analysis of 100 reoperations in 93 patients who had initial CABG between 1972 and 1988.
- Data collected on patient demographics, indications for reoperation, perioperative events, and follow-up outcomes.
Main Results:
- Late graft failure and progressive atherosclerosis were primary indications for reoperation (>60%).
- Reoperation mortality (1%) was comparable to initial CABG (1.4%).
- Perioperative myocardial infarction rates were lower for reoperation (1%) versus initial CABG (3.2%).
- Symptomatic improvement was observed in 89.1% of patients, with nearly 60% becoming asymptomatic post-reoperation.
Conclusions:
- Reoperation after CABG is a viable option for patients with persistent or recurrent symptoms.
- Repeat CABG offers significant symptomatic relief and favorable outcomes with acceptable risks.
- Graft longevity and management of atherosclerosis are critical factors in long-term CABG success.
Abstract:
One hundred reoperations were performed on 93 patients of a total of 2287 patients who underwent initial coronary artery bypass surgery (CABG) between September 1972 and August 1988. The mean age of the 84 males and 9 females was 55.5 years (range 31-75 years). All patients prior to reoperation had severe angina and were judged to be in NYHA class III or class IV. Late graft failure alone or in combination with progressive atherosclerosis accounted for more than 60% of the cases requiring reoperation. The early mortality for reoperation was 1% compared with 1.4% for initial CABG. Perioperative myocardial infarction was recorded as a complication in 3.2% of cases at initial operation compared with 1% at reoperation. Symptomatic improvement occurred in 89.1% of cases after reoperation and almost 60% became entirely asymptomatic (mean follow-up interval 17 months).