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Influence of patient characteristics and arterial grafts on freedom from coronary reoperation
Joseph F Sabik1, Eugene H Blackstone, A Marc Gillinov
1Department of Thoracic and Cardiovascular Surgery, The Cleveland Clinic Foundation, Cleveland, Ohio 44195, USA. sabikj@ccf.org
Insights
Patient factors like younger age and high cholesterol increase the need for repeat coronary artery bypass grafting (CABG). Extensive arterial grafting during initial CABG can reduce reoperations.
Area of Science:
- Cardiovascular Surgery
- Cardiology
- Vascular Biology
Background:
- Arteriosclerosis is a progressive condition necessitating repeat interventions after coronary artery bypass grafting (CABG).
- Identifying predictors for reoperative CABG is crucial for patient management and resource allocation.
Purpose of the Study:
- To identify patient characteristics and operative factors predicting the need for reoperative coronary artery bypass grafting.
- To analyze variables associated with the occurrence of coronary reoperation after initial CABG.
Main Methods:
- A multivariable time-related analysis was performed on 26,927 patients who underwent primary isolated coronary artery bypass grafting between 1971 and 1998.
- The analysis modeled freedom from coronary reoperation and identified patient and operative variables linked to reoperation occurrence.
Main Results:
- Freedom from reoperation was 65% at 25 years post-CABG.
- Younger age, higher total cholesterol and triglyceride levels, lower HDL, diabetes, and more extensive coronary artery disease increased reoperation risk.
- Increased arterial grafting during primary CABG decreased the likelihood of reoperation.
Conclusions:
- Patient factors influencing arteriosclerosis progression and bypass conduit choice impact reoperative CABG rates.
- Aggressive risk-factor reduction and extensive arterial revascularization during primary CABG may reduce the need for repeat procedures.
Objective:
Arteriosclerosis is a progressive disease, and many patients require repeat coronary intervention after coronary artery bypass grafting. We sought to identify patient characteristics and operative factors that predict the need for or bias toward reoperative coronary artery bypass grafting.
Methods:
From 1971 to 1998, 48,758 patients underwent primary isolated coronary artery bypass grafting, and 1000 per year were followed every 5 years (n = 26,927). A multivariable time-related analysis was performed to model freedom from coronary reoperation and to identify patient and operative variables associated with occurrence of coronary reoperation.
Results:
Freedoms from reoperative coronary artery bypass grafting were 99.6%, 98.4%, 93%, 82%, 72%, and 65% at 1, 5, 10, 15, 20, and 25 years, respectively. Risk of reoperation (hazard function) demonstrated a short, rapidly declining early phase, followed by a long, slow-rising late phase. Patient variables that increased the likelihood of coronary reoperation included younger age (P < .0001), higher total cholesterol (P = .0004) and triglyceride levels (P = .0005), lower high-density lipoprotein (P = .0002) level, diabetes mellitus (P < .0001), and more extensive coronary artery disease (P = .01). Increasing extent of arterial grafting performed at primary coronary artery bypass grafting decreased occurrence of coronary reoperation (P < .0001).
Conclusion:
Patient factors associated with arteriosclerosis progression and type of bypass conduit influence the need for or bias toward repeat coronary artery bypass grafting. Aggressive patient risk-factor reduction and extensive arterial coronary revascularization at primary coronary artery bypass grafting should result in fewer coronary reoperations.
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