Fig. 5From: Long-term performance of an external stent for saphenous vein grafts: the VEST IV trialIVUS images showing a constrictive versus b loose fitting external stent (red arrows). Difference in wall thickness (yellow) and intima layer (blue) can be observed. In addition, there is formation of “neo-adventitia” between the loose-fitting stent and the original vessel wallBack to article page