Consequences of underexpansion of a percutaneous aortic valve bioprosthesis

Transcatheter aortic valve implantation has been shown to be an effective and reproducible therapy for severe aortic valve stenosis. Device performance and short-term outcomes of well- deployed prostheses have been extensively investigated and discussed; however, these endpoints have not yet been reported in cases charac- terized by suboptimal expansion. We describe a case of CoreValve self-expanding prosthesis underexpansion, reporting data on prosthe- sis performance and short-term clinical outcome.