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Spontaneous Dilatation of Stents at Three Months after Carotid Artery Stenting without post-CAS Balloon Dilatation YUHEI TANNO, Takahisa Mori, Tomonori.

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Presentation on theme: "Spontaneous Dilatation of Stents at Three Months after Carotid Artery Stenting without post-CAS Balloon Dilatation YUHEI TANNO, Takahisa Mori, Tomonori."— Presentation transcript:

1 Spontaneous Dilatation of Stents at Three Months after Carotid Artery Stenting without post-CAS Balloon Dilatation YUHEI TANNO, Takahisa Mori, Tomonori Iwata, Yoshinori Aoyagi, Shigen Kasakura, Kazuhiro Yoshioka Department of Stroke Treatment Shonan Kamakura General Hospital Stroke Center, Kamakura, Japan EP-13

2 Financial Disclosures None

3 【 Purpose 】 Just after CAS 3 months after CAS Stent diameter (SD):3.02mm SD:4.72mm Do stents spontaneously dilate after CAS?

4 【 Materials and Methods 】 We included in our analysis patients 1) who underwent elective CAS without post-CAS balloon dilatation from January 2012 to March 2014, 2) who underwent follow-up conventional angiography at 3 months after CAS. 【 Evaluation 】 1)Patients features 2)Measurement of stent diameter (SD) 3)Comparison of SD between at CAS and at 3M

5 Patients matched to criteria, no68 CAS procedures matched to criteria, no71 Age, average (years ) 74.8 Sex, female, no ( % )12/68 ( 17.6% ) Closed-cell type (CL type) stent, no ( % ) 53/71 (74.6%) Open-cell type (OP type) stent, no ( % ) 18/71 (25.4%) SD just after CAS, median,(IQR) (mm) 3.27 (3.06-3.68) SD at 3 months, median,(IQR) (mm) 3.99 (3.58-4.30) 【 Results 】

6 【 SD dilatation at 3M after CAS 】 p<0.0001 Just after CAS CAS at 3M SD ( mm ) (By Wilcoxon signed-rank test) In 62 cases 3.27mm 3.99mm

7 【 SD just after CAS according to stent types 】 CL type OP type P<0.05 SD (mm) (By Wilcoxon rank sum test) 3.22mm 3.59mm

8 【 SD at 3M according to stent types 】 OP type CL type P<0.01 SD (mm) (By Wilcoxon rank sum test) 3.86mm 4.05mm

9 【 Changes of SD in CL or OP type 】 CL type OP type Differenece of median SD in CL; 0.64mm Differenece of median SD in OP; 0.46mm Just after CAS 3M SD (mm) N.S. N.S. : p>0.05

10 CAS With an Open Type Stent At 3M Before CAS Just after CAS 4.09mm6.55mm

11 CAS with a Closed Type Stent Before CAS Just after CAS At 3M 3.02mm 4.72mm

12 【 Conclusion 】 ◯ Stents spontaneously dilated by about 10 to 20% without post-CAS balloon dilatation. ◯ Stent diameter at 3 months was wider in OP type. ◯ Dilatation rate at 3 months looked bigger in CL type.


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