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Ann Thorac Surg 2000;69:1792-1798
© 2000 The Society of Thoracic Surgeons

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Original articles: Cardiovascular

Coronary and carotid operations under prospective standardized conditions: incidence and outcome

^a Division of Cardiothoracic Surgery, Department of Surgery, University Hospital and Medical Center, State University of New York at Stony Brook, Stony Brook, New York, USA
^b Division of Vascular Surgery, Department of Surgery, University Hospital and Medical Center, State University of New York at Stony Brook, Stony Brook, New York, USA

Address reprint requests to Dr Bilfinger, Div of Cardiothoracic Surgery, Dept of Surgery, State University of New York at Stony Brook Health Sciences Center, T19-080, Stony Brook, NY 11794-8191
e-mail: bilfinge{at}surg.som.sunysb.edu

Background. No randomized trial has yet evaluated the hypothetical benefit of carotid endarterectomy with coronary artery bypass grafting. This prospective review was undertaken to determine the differences between observed and predicted complication rates, as well as to define new predictors and assess costs in a standardized population.

Methods. A prospective nonrandomized study was undertaken over a 4-year period involving all coronary artery bypass graftings done at one institution. Operative procedure was standardized. All patients underwent preoperative screening for carotid disease. If 80% or more stenosis was present, combined coronary artery bypass grafting and carotid endarterectomy was performed.

Results. Of 2,071 patients, 1,987 had coronary artery bypass grafting only. In that group there were 34 strokes (1.7%) and 41 deaths (2.0%). Eighty-four patients underwent combined coronary artery bypass grafting/carotid endarterectomy and in that group there were four strokes (4.7%) and five deaths (5.9%). Independent risk factors for postoperative stroke were age (odds ratio 1.09; 95% confidence interval 1.04, 1.3), hypertension (odds ratio 2.67; 95% confidence interval 1.22, 5.23), extensively calcified aorta (odds ratio 2.82; 95% confidence interval 1.34, 5.97), and bypass time (odds ratio 1.01; 95% confidence interval 1.00, 1.02). Cost of a stroke was significant (p < 0.05) in both groups.

Conclusions. Patients with carotid disease fall into a higher risk group than patients without it. This increased risk is not because of carotid disease alone. Patients without significant carotid disease, who suffered a perioperative stroke, fell into an even higher risk category. Furthermore, carotid endarterectomy was not a significant risk factor by either the univariate or the multivariate analysis.

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Ann. Thorac. Surg. 2000 69: 1798. [Extract] [Full Text] [PDF]

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