Abstract 14668: Balloon Angioplasty versus Implantation of Nitinol Stents in Small Diameter Vessel and Intermediate Length Superficial Femoral Artery Lesions
Background: Self-expanding nitinol stents have proven superior primary patency than balloon angioplasty in superficial femoral artery (SFA) lesions. However, the effective therapy for small diameter and diffuse long SFA lesion is unknown.
Methods: This study was a single center, retrospective observational study. From January 2004 to December 2011, 171 limbs with less than 4mm diameter vessels and more than 40mm length SFA stenosis or occlusion lesions were treated by balloon angioplasty (BA) or stenting (ST). Patency was assessed by duplex ultrasound or angiography. And outcomes were compared between groups by the Kaplan-Meier and log-rank methods.
Results: ST group was 86 limbs and BA group was 85 limbs. Patients characteristics were not significant difference except ABI (ST group=0.6, BA group=0.7, P=0.01). The mean total lesion length was 92mm for ST group and 63mm for BA group (P<0.0001). The vessel diameter was 4.2mm for ST group and 3.9mm for BA group (P<0.001). A higher percentage of ST group was chronic total occlusion lesion when compared to BA group (43% ST group vs 11% BA group; P<0.0001). At 1 year, the primary patency rate was similar ST group and BA group (59% versus 65%; P=0.43). There was no significant difference in MACE for up to 1 year (P=0.39).
Conclusions: The results of our study suggest that stent placement in the small vessel and intermediate length SFA lesions dose not increase the patency rate when compared with balloon angioplasty.
- © 2012 by American Heart Association, Inc.