Rapid evolution from coronary dissection to pseudoaneurysm after stent implantation: a glimpse at the pathogenesis using intravascular ultrasound.

Coronary dissection during angioplasty can evolve into pseudoaneurysm. Stenting should prevent this complication. We present a case of coronary pseudoaneurysm after dissection that developed despite stent implantation. Intravascular ultrasound demonstrated no sealing of the false lumen due to undersizing and non-apposition to the wall by the stent.