TAVI: U.K. study finds 60% survival rate at 3 years May 4, 2015 By Mark Hollmer Leave a Comment The survival rate for high-risk patients with transcatheter aortic valve implants surpassed 61% at 3 years and drops to 45.5% at 5 years, according to a new analysis of data from the U.K. Transcatheter Aortic Valve Implantation Registry.