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Eur J Cardiothorac Surg 2001;19:662-666
© 2001 Elsevier Science NL

Severe obesity does not adversely affect perioperative mortality and morbidity in coronary artery bypass surgery

Department of Cardiovascular Surgery, University Hospital Kiel, Arnold-Heller-Strasse 7, 24105 Kiel, Germany

Received 7 October 2000; received in revised form 26 January 2001; accepted 24 February 2001.

Corresponding author. Tel.: +49-431-597-4401; fax: +49-431-597-4402
e-mail: mbrandt{at}kielheart.uni-kiel.de

Objective: Obese patients are usually thought to have an increased risk for complications in coronary artery bypass surgery. Methods: Therefore, the data of 500 consecutive patients undergoing coronary artery bypass grafting at our department in 1998 by use of cardiopulmonary bypass were analyzed. Severe obesity was defined as body mass index (BMI) 30.0 kg/m². Obese patients (n=100; group O) were compared to the remaining 400 patients (group C). Both groups were comparable with respect to sex, history of prior myocardial infarction, chronic obstructive pulmonary disease, previous stroke, duration of cardiopulmonary bypass, aortic cross-clamp time and number of distal anastomoses performed. Obese patients were slightly younger and diabetes and hypertension were more common in these patients. Results: Survival and potential complications including perioperative myocardial infarction, sternal wound infection, wound infection at the leg, renal failure, stroke, prolonged mechanical ventilation, pneumonia, reexploration for bleeding, and atrial arrhythmias were analyzed. No significant differences between obese and non-obese patients were detected. Conclusion: Severe obesity does not necessarily adversely affect perioperative mortality and morbidity in patients undergoing coronary artery bypass grafting in this study.

Key Words: Coronary artery bypass surgery • Obesity • Body mass index

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