Metabolic syndrome is an independent risk factor for stroke and acute renal failure after coronary artery bypass
Kan Kajimoto1, Katsumi Miyauchi, Takatoshi Kasai
1Department of Cardiovascular Surgery, Juntendo University School of Medicine, Tokyo, Japan.
Insights
Metabolic syndrome significantly increases the risk of stroke and acute renal failure after coronary artery bypass grafting (CABG). This finding highlights metabolic syndrome as a critical, novel risk factor for adverse outcomes in CABG patients.
Area of Science:
- Cardiovascular Surgery
- Metabolic Disorders
- Nephrology
Background:
- Metabolic syndrome is prevalent in patients undergoing coronary artery bypass grafting (CABG).
- The impact of metabolic syndrome on postoperative complications following CABG is not well-established.
Purpose of the Study:
- To investigate the influence of metabolic syndrome on postoperative outcomes in patients who have undergone CABG.
- To determine if metabolic syndrome is a significant risk factor for adverse events after CABG.
Main Methods:
- 1183 patients undergoing CABG were analyzed.
- Metabolic syndrome was diagnosed using the modified National Cholesterol Education Program Adult Treatment Panel III criteria.
- Multivariate analysis assessed the association between metabolic syndrome and postoperative complications.
Main Results:
- Metabolic syndrome was present in 46.6% of patients.
- Patients with metabolic syndrome had higher rates of postoperative stroke (4.7% vs 2.1%) and acute renal failure (3.8% vs 1.1%).
- Metabolic syndrome was independently associated with increased odds of stroke (OR 2.47) and acute renal failure (OR 3.81).
Conclusions:
- Metabolic syndrome is a significant risk factor for postoperative stroke and acute renal failure in CABG patients.
- Metabolic syndrome should be recognized as a novel risk factor for adverse outcomes in this patient population.
Objectives:
Metabolic syndrome is common among patients having coronary artery bypass grafting. However, it remains unclear whether it has a significant impact on postoperative complications. We aimed to determine whether metabolic syndrome negatively influences the postoperative outcomes of coronary artery bypass grafting.
Methods:
We enrolled 1183 patients who had coronary artery bypass grafting at Juntendo University Hospital between 1984 and 1992. Patients were categorized by the presence or absence of metabolic syndrome using the modified National Cholesterol Education Program Adult Treatment Panel III definition with body mass index in the place of waist circumference. Multivariate analysis was performed to assess the relationships between preoperative presence of metabolic syndrome and postoperative outcomes.
Results:
Metabolic syndrome was present in 551 (46.6%) patients and absent in 632 (53.4%). Postoperative stroke occurred in 4.7% of patients with metabolic syndrome and 2.1% of patients without metabolic syndrome (P < .0001). Postoperative acute renal failure occurred in 3.8% of patients with metabolic syndrome and 1.1% of patients without metabolic syndrome. On multivariate analysis, metabolic syndrome had odds ratios of 2.47 (95% confidence interval 1.22-4.99; P = .012) for postoperative stroke and 3.81 (95% confidence interval 1.42-10.3; P = .008) for postoperative acute renal failure.
Conclusions:
This study showed the clinical importance of metabolic syndrome with respect to postoperative stroke and acute renal failure in patients having coronary artery bypass grafting. Like many established risk factors for postoperative complications, metabolic syndrome should be recognized as a novel risk factor for adverse events.
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