Nat. Rev. Cardiol. doi:10.1038/nrcardio.2017.82 Figure 4 Commercially available and investigational devices for transcatheter aortic valve implantation Figure 4 | Commercially available and investigational devices for transcatheter aortic valve implantation. Valves are grouped into those that are delivered mounted on a balloon for delivery, those that are unsheathed as a self-expanding design, and those with a unique delivery mechanism. Of the devices pictured, only the Edwards SAPIEN XT and S3 balloon expandable valves and the Medtronic Evolut-R self-expanding valves are currently approved for commercial use by the FDA. The device manufacturers' details from left to right, top to bottom: SAPIEN, SAPIEN XT, SAPIEN 3 (Edwards Lifesciences, USA); Colibri Heart Valve (Colibri, USA); CoreValve, CoreValve Evolut-R (Medtronic, USA); Portico (St. Jude Medical, USA); Venus (Medtech, China); ACURATE (Boston Scientific, USA); LOTUS Edge (Boston Scientific, USA); JenaValve (JenaValve, Germany), Meridian (Heart Leaflet Technologies, Italy). Images reprinted with permission from the companies indicated in the Figure. Images reprinted with permission from the companies indicated in the Figure. Jones, B. M. et al. (2017) Matching patients with the ever-expanding range of TAVI devices Nat. Rev. Cardiol. doi:10.1038/nrcardio.2017.82