Abstract W P17: Spontaneous Dilatation of Stents at Three Months After Carotid Artery Stenting Without Post-Carotid Artery Stenting Balloon Dilatation
Objective: The aim of our retrospective study was to investigate how wide stents were spontaneously dilated at three months after carotid artery stenting (CAS) without post-CAS balloon dilatation (BT).
Methods: We included in our analysis patients 1) who underwent elective CAS without post-CAS BT from January 2012 to March 2014, 2) who underwent follow-up conventional angiography at 3 months after CAS, Patients’ baseline characteristics, stent types (open cell: OP or closed cell: CL), stent diameter (SD) at the site with minimum width on the lateral projection immediately and at 3 month after CAS were evaluated.
Results: Sixty-two lesions in fifty-nine patients were analyzed. Their average age was 74.9 years old, median SD immediately after CAS was 3.27mm(3.08_3.64:interquartile range), median SD at 3 months was 3.99mm(3.58-4.27), and thus SD was spontaneously dilated (p<0.0001). In OP types (18 cases), median SD changed from 3.59 to 4.05 mm and in CL types (44 cases) from 3.22 to 3.85 mm. Median SD after deployment was wider in OP type anytime (p<0.05), whereas dilatation rate seemed to be bigger in CL type.
Conclusion: Stents were spontaneously dilated about 10 to 20% without post-CAS balloon dilatation. SD at 3 months was wider in OP type, whereas dilatation rate at 3 months was bigger in CL type.
Author Disclosures: Y. Tanno: None. T. Mori: None. T. Iwata: None. Y. Aoyagi: None. S. Kasakura: None. K. Yoshioka: None.
- © 2015 by American Heart Association, Inc.