Abstract 5033: Safety and Efficacy of Carotid Stenting in the Very Elderly

Background: Carotid artery stenting (CAS) has emerged as an alternative to carotid endarterectomy (CEA) in patients at high-risk for complications from surgery. The very elderly (> 79 years old) are one subgroup of patients identified as being at increased risk for carotid surgery. However, there is concern that the very elderly are also at increased risk for complications of CAS. A stroke and death rate of 12% was reported in very elderly patients during the roll-in phase of Carotid Revascularization Endarterectomy versus Stent Trial (CREST). We are reporting on a large clinical series of CAS with independent neurological assessment in the very elderly. Methods: Between 1994 and 2008, a consecutive series of 418 CAS patients (> 79 years old) were treated at four high-volume centers with extensive CAS experience. Independent neurologic assessment was performed after CAS procedures. Thirty-day follow-up information was available in 389 patients. Results: The average age was 83.2±2.8 years. Most patients were male (63.2%) and the target lesion carotid stenosis was asymptomatic in two-thirds (68.2%) of patients. The majority of patients treated with CAS had a history of coronary artery disease (74.4%), hypertension (87.8%) and dyslipidemia (71.1%). One third (30.1%) were diabetic and more than half (56.5%) were current or former smokers. Embolic protection devices (EPD) were used in 78.7% of cases with the CAS procedure being performed prior to EPD availability being the most common reason for not using them. The 30-day incidence of stroke and death was 2.8% (11/389). The cumulative incidence of major cardiovascular events (stroke, death or myocardial infarction) during that time period was 3.3% (13/389). Conclusion: This large series of CAS with independent neurologic assessment is convincing evidence that the very elderly (> 79 years old) can safely undergo CAS with stroke and death rates comparable to younger patients. The key to obtaining these excellent results is that CAS be performed by high-volume, experienced operators who exercise restraint regarding patient selection.