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A prospective study with random selection between primary closure and saphenous vein patching after carotid endarterectomy was conducted. Patients were evaluated with intravenous digital subtraction angiography during the initial postoperative period, followed by duplex scanning at 3 and 6 months, and then yearly examinations. The series consisted of 129 carotid endarterectomies, of which 62 were...