What is aortic stenosis? How can this condition be treated? What are the benefits and risks involved with this treatment? Find out how a minimally invasive procedure, helps to replace the aortic valve. Transcatheter aortic valve replacement (TAVR) is a minimally invasive heart procedure to replace a narrowed aortic valve that fails to open properly (aortic valve stenosis). Transcatheter aortic valve replacement is sometimes called transcatheter aortic valve implantation (TAVI).