Longitudinal deformation of a third generation zotarolimus eluting stent:“The concertina returns!”

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.

科学评论:冠脉成形术和支架植入术

冠状动脉血运重建有两种主要干预措施:球囊血管成形术和开胸心脏手术。经皮冠脉血管成形术即应用一根管腔较粗的指引导管,从股动脉的腹股沟段逆行送入主动脉根部,再进入冠状动脉。将一根导引导丝经指引导管通过狭窄的冠状动脉,导引导丝引导扩张球囊(必要时可覆载支架)进入冠脉的病变部位,扩张球囊,向外挤压动脉粥样硬化斑块,使冠状动脉的管腔增大。释放支架支撑冠脉扩张处,等支架到位后(通过冠脉造影证实),将导引导丝和指引导管撤出体外。