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Document downloaded from http://www.revespcardiol.org, day 27/11/2014. This copy is for personal use. Any transmission of this document by any media or format is strictly prohibited.Interventional cardiologists have spent years working on and dreaming about transcatheter aortic valve implantation. In 2007-2008 we were privileged in Spain1,2 to use 2 of the most commonly-implanted devices at the time: the Cribier-Edwards aortic valve prosthesis1 and the CoreValve self-expanding pros-thesis.2 These devices had successful initial results in high-surgical-risk patients with severe aortic stenosis. However, it soon became apparent that the devices had a number of limitations preventing their use in all patients with severe aortic stenosis. Furthermore, the implantation procedure sometimes led to complications and suboptimal results.3,4 After this initial experi-ence, interventional cardiologists have now identified some areas where they would like to see technical improvements5: 1. A lower profile device to permit delivery with introducers measuring less than 18 F. A transfemoral approach requires