Outcome after 7 years of carotid artery stenting and endarterectomy in Sweden - single centre and national results.

Abstract Objectives The aim was internal vascular centre quality-control measures to compare single-centre results with the national perspective, as well as analysing the Swedish results from carotid artery stenting (CAS) and comparing a relatively high-volume single centre with the Swedish Vascular Registry (Swedvasc) data. The second aim was to compare CAS and carotid artery endarterectomy (CEA) outcomes for the same 7-year period. Design Retrospective review of a single high-volume centre (Sodersjukhuset (SOS)) (approximately 30 CAS year −1 approximately 90 CEA year −1 ) versus Swedvasc National data. Materials and methods All consecutive selective patients treated with CAS at SOS for a stenosis of the internal carotid artery ( n  = 208) or CEA ( n  = 552) between 2004 and 2011 were compared with all patients in Swedvasc registered for CAS ( n  = 258) and CEA ( n  = 6474). Primary outcome was 30-day frequency of stroke or death. Secondary outcome was stroke/death/acute myocardial infarction (AMI). Results The 30-day frequency of any stroke or death after CAS at SOS compared to the national data was 2.9% and 7.4%, respectively ( P  = 0.04). The 30-day AMI/stroke/death frequency was 3.4% and 9.5%, respectively ( P  = 0.01). After CEA during the same time period, the Swedvasc national data had a 4.4% frequency of 30-day stroke and death and 5.8% for AMI/stroke/death. Conclusions CAS is not as safe as CEA from a national perspective but our results indicate that a single centre can achieve acceptable results with CAS.