Fig. 2

Eight lines perpendicular to the long axis of the self-expandable valve (SEV) drawn (middle) for measurement purposes; these were drawn at the top and bottom of the SEV and at the intersection of each row of wires (left). The line closest to the annulus plane was defined as position 0; those below the annulus plane were positions − 1, − 2, and − 3; and those above the annulus plane were positions 1, 2, 3, and so on