Carotid endarterectomy contralateral to carotid artery occlusion: analysis from a randomized study.

Objective: Many studies have reported the benefits of carotid endarterectomy (CEA) contralateral to an occluded internal carotid artery (ICA), with varying results. This study analyzed perioperative and late outcomes in a recent trial in which patients were randomized to carotid eversion endarterectomy (CEE) or traditional CEA with patching (CEAP).

Methods: In 336 primary CEAs (310 patients) 68 were contralateral to an occluded ICA (group I). The remaining 268 CEAs served as control group (group II). All patients underwent clinical follow-up and duplex ultrasonography at 1, 6, and 12 months and every year thereafter. Endpoints of the study were early and late neurological events, and deaths.

Results: Group I had a significantly higher incidence of perioperative electroencephalic changes and need for shunting. The perioperative stroke rate in group I was almost three times as high as in group II, but the difference was not significant. Similarly, the perioperative minor neurological event and death rates, as with the cumulative stroke-free and survival rates at 1, 3, and 5 years, were comparable in the two groups.

Conclusions: CEA contralateral to an occluded ICA can be implemented with perioperative stroke and mortality rates and late stroke-free and survival rates comparable to CEA with no contralateral ICA occlusion.