[Reoperation after saphenous aortocoronary bypass]

Area of Science:

• Cardiovascular Surgery
• Cardiac Surgery Outcomes
• Coronary Artery Bypass Grafting Reoperation

Context:

• Analysis of 24 patients undergoing reoperation for coronary bypass grafting (CABG) between 1977 and 1983.
• Reoperation incidence was 1.4%, showing an increasing trend.
• Preoperative assessment identified persistent cardiovascular risk factors, including smoking (75%) and hyperlipidemia (61%).

Purpose:

• To report the outcomes and characteristics of patients requiring reoperation for coronary bypass grafting.
• To analyze the causes of graft failure and the results of repeat surgical intervention.
• To compare reoperative outcomes with primary coronary surgery.

Summary:

• The primary indication for reoperation was recurrent chest pain (21/24 patients), confirmed by coronary arteriography.
• Patients were categorized into early (technical issues/incomplete revascularization) and late (graft disease/atherosclerosis) reoperations.
• Progression of coronary atherosclerosis was the main cause of saphenous graft occlusion; internal saphenous veins were most commonly used.
• Reoperations involved an average of 1.5 grafts per patient, with left anterior descending and right coronary arteries most frequently bypassed.
• Myocardial protection utilized cardioplegia and intermittent clamping with hypothermia.
• Reoperative mortality was 4%, higher than the 2.3% for elective primary coronary surgery, with an 8% perioperative infarction rate.

Impact:

• Highlights the challenges and increased risks associated with repeat coronary bypass grafting.
• Underscores the importance of managing long-term risk factors post-CABG to prevent graft failure.
• Provides data on surgical techniques and graft choices in reoperative settings.