Fig. 6From: Aortic valve replacement in elderly with small aortic root and low body surface area; the Perceval S valve and its impact in effective orifice areaUsing the three guides it performs in situ positioning of the valve. It is released in two steps: first the inflow ring is released at the native aortic annulus level and then, when proper positioning is verified, the complete prosthesis release is achievedBack to article page