The CoreValve™ ReValving System prosthesis consists of porcine pericardial tissue self-expanding nitinol frame (Figure 2).

The prosthetic size is determined by the external diameter of the ventricular end; the 26 and 29 mm prostheses have mid-portion diameters of 22 and 24 mm, aortic end-diameters of 40 and 43 mm, and prosthetic lengths of 55 and 53 mm, respectively. The 26 mm prosthesis is designed for patients with aortic annular diameters of 20-23 mm, whereas the 29 mm prosthesis is suitable for patients with 24-27 mm aortic annuli. In the presence of ascending aortic diameters >45 mm and/or aortic annular diameters < 20 or >27 mm, this device should not be implanted.