“…Restenosis after CEA has been reported in 5% to 10% of cases when assessed by postoperative ultrasonography, but the rate has been consistently below 5% when patching was used in more recent series (407,440,468,624,625,628 -630). When periodic duplex scanning is used, hemodynamically significant recurrent stenosis rates of 5% to 7% have been reported in multicenter trials in which the quality of surgery is monitored carefully (396,403,404,406,440,628,(631)(632)(633)(634)(635)(636)(637)(638)(639)(640)(641)(642)(643)(644)(645).…”