Update on transcatheter aortic valve implantation registries and studies.

For patients at increased surgical risk and those not suitable candidates for surgical aortic valve replacement, transcatheter aortic valve implantation has emerged as a promising less-invasive treatment option, with a growing body of evidence on safety and efficacy in this particular patient population. However, the enthusiasm we have been witnessing over the past decade is almost exclusively supported by registry data, with the first randomized trial published only recently. In this paper, we provide an overview on the current data set available on transcatheter aortic valve implantation using the commercially available devices, focusing on the latest publications reflecting the current opinion on this emerging technology.