Intravascular ultrasonic evaluation of poststenting atherosclerotic plaque redistribution and lumen reduction at the stent edge:does stent length matter?
10.3321/j.issn:0253-3758.2008.06.001
- VernacularTitle:应用血管内超声探讨冠状动脉不同长度支架置入后对斑块重新分布的影响
- Author:
Xiao-Fei WANG
1
;
Cheng-Zhi LU
;
Da-Sheng XIA
Author Information
1. 天津市第一中心医院
- Keywords:
Ultrasonography,interventional;
Angioplasty,transluminal percutaneous coronary;
Plaque distribution
- From:
Chinese Journal of Cardiology
2008;36(6):481-484
- CountryChina
- Language:Chinese
-
Abstract:
Objective To evaluate the association between poststenting atherosclerotic plaque redistribution/lumen reduction at the stent edge and stent length.Methods Seventy stents were implanted to 47 patients with stable or unstable angina and 33 stents were≤18 mm and 37 stents were>18 mm.Intravascular ultrasound analysis was performed on proximal stent edge,stent area and distal stent edge.Lumen area (LA) and vascular area (VA) were measured and lumen volume (Lv) and vascular volume (VV) were calculated on the three segments.Vascular wall volume (WV) was calculated as VV-LV.volume of plaque redistribution=peststenting WV-prestenting WV.Results Compared to prestenting,poststenting LV significantly decreased,VV remained unchanged and WV significantly increased at proximal and distal edges of≤18 mm group and at proximal edge of>18 mm group.suggesting reduced lumen due to plaque distribution. At distal edge of>18 mm group,poststenting LV,VV and WV all equally significantly increased therefore the lumen Was not affected by plaque distribution.Conclusion The poststenting lumen changes due to plaque redistribution were associated with stent length,lumen reduced at proximal and distal edge of short stents and proximal edge of long stents but not at the distal edge of long stents.
