Figure 6.

The Edwards Alterra adaptive pre-stent. (A) Show the stent, a Nitinol frame almost completely covered excluding the distal end which is uncovered like the Venus P valve (Figure 4) to protect from haemodynamically jailing the branch pulmonary arteries. (B) In long axis and (C) in short axis show the Alterra device after deployment of the 29 mm Sapien S3 valve inside. The concept of a pre-stent with subsequent valve deployment is a departure from other commercially available and developmental systems.