Second generation drug eluting stents(DES) have shown better safety and efficacy in comparison to first generation DES,because of thinner struts,nondurable polymers and coating with better anti-proliferative drugs.The...Second generation drug eluting stents(DES) have shown better safety and efficacy in comparison to first generation DES,because of thinner struts,nondurable polymers and coating with better anti-proliferative drugs.The newer DES with cobalt alloy base have demonstrated a greater trackability,deliverability,conformability,flexibility and radio-opacity.However,these thin strut stents have a downside of poor longitudinal axial strength,and therefore get easily deformed/ compressed at their end with a slight trauma during exchange of various catheters.We hereby report two cases of "longitudinal stent compression(LSC)" of everolimus-eluting stent,which happened during percutaneous coronary intervention of right coronary artery.Both the cases were successfully managed with non-compliant balloon dilatation.Various reasons for LSC and its management are discussed in the article.展开更多
In the current case series we describe two cases of longitudinal stent deformation in ostial lesions treated with a new generation zotarolimus eluting stent and review current literature on longitudinal stent deformat...In the current case series we describe two cases of longitudinal stent deformation in ostial lesions treated with a new generation zotarolimus eluting stent and review current literature on longitudinal stent deformation. Historically not a common occurrence,longitudinal deformation occurred mainly in Promus Element everolimus eluting stents,which had only two rather than the commonly used 3 links between stent rings. Longitudinal deformation commonly occurs secondary to compression of the proximal edge of the stent by either the guide catheters,or intravascular balloons and imaging catheters. The degree of deformation however,depends on the longitudinal strength and design of the stent.展开更多
Several recent reports have described the occurrence of longitudinal stent deformation(LSD, defined as the distortion or shortening of a stent along the longitudinal axis), following its successful deployment. However...Several recent reports have described the occurrence of longitudinal stent deformation(LSD, defined as the distortion or shortening of a stent along the longitudinal axis), following its successful deployment. However, few reports have described LSD prior to any stent deployment. This previously unrecognized complication is the result of modifications to stent design. It has been noted that the new-generation stent platforms have a reduced number of connectors, which in turn causes a reduction in longitudinal stent strength. To corroborate previous findings by our lab and others(Vijayvergiya et al, 2013), we describe here two cases of LSD prior to stent deployment that occurred due to crushing of the proximal stent edge by the guide catheter while attempting to withdraw the crimped stent. In addition, we discuss the associated risk factors, such as the length of the stent, and specific management strategies, including technical guidelines and use of fluoroscopic guidance for maneuvering the stent during the procedure.展开更多
文摘Second generation drug eluting stents(DES) have shown better safety and efficacy in comparison to first generation DES,because of thinner struts,nondurable polymers and coating with better anti-proliferative drugs.The newer DES with cobalt alloy base have demonstrated a greater trackability,deliverability,conformability,flexibility and radio-opacity.However,these thin strut stents have a downside of poor longitudinal axial strength,and therefore get easily deformed/ compressed at their end with a slight trauma during exchange of various catheters.We hereby report two cases of "longitudinal stent compression(LSC)" of everolimus-eluting stent,which happened during percutaneous coronary intervention of right coronary artery.Both the cases were successfully managed with non-compliant balloon dilatation.Various reasons for LSC and its management are discussed in the article.
文摘In the current case series we describe two cases of longitudinal stent deformation in ostial lesions treated with a new generation zotarolimus eluting stent and review current literature on longitudinal stent deformation. Historically not a common occurrence,longitudinal deformation occurred mainly in Promus Element everolimus eluting stents,which had only two rather than the commonly used 3 links between stent rings. Longitudinal deformation commonly occurs secondary to compression of the proximal edge of the stent by either the guide catheters,or intravascular balloons and imaging catheters. The degree of deformation however,depends on the longitudinal strength and design of the stent.
文摘Several recent reports have described the occurrence of longitudinal stent deformation(LSD, defined as the distortion or shortening of a stent along the longitudinal axis), following its successful deployment. However, few reports have described LSD prior to any stent deployment. This previously unrecognized complication is the result of modifications to stent design. It has been noted that the new-generation stent platforms have a reduced number of connectors, which in turn causes a reduction in longitudinal stent strength. To corroborate previous findings by our lab and others(Vijayvergiya et al, 2013), we describe here two cases of LSD prior to stent deployment that occurred due to crushing of the proximal stent edge by the guide catheter while attempting to withdraw the crimped stent. In addition, we discuss the associated risk factors, such as the length of the stent, and specific management strategies, including technical guidelines and use of fluoroscopic guidance for maneuvering the stent during the procedure.
