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Eighty patients(6.8%)suffered at least one adverse event.Rates for individual complications were as follows:death,1.4$;nonfatal stroke,3.4%; nonfatal myocardial infarction,2.1%;and nonfatal stroke or death,4.8%. Significant predictors of adverse events were age 75 years or older, symptom status(ipsilateral symptoms versus asymptomatic or nonipsilateral symptoms),severe hypertension(preoperative diastolic blood pressure of greater than 110 mm Hg),carotid endarterectomy performed in preparation for coronary artery bypass surgery,history of angina,evidence of internal carotid artery thrombus,and internal carotid artery stenosis near the carotid siphon.The presence of two or more of these risk factors was associated with a nearly twofold increase in risk of an adverse event (relative risk,1.7;95%confidence interval,1.0 to 3.0).Clinical data can be used to stratify patients undergoing carotid endarterectomy according to risk of postoperative in-hospital stroke,myocardial infarction,or death. |
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