Figure legends
Figure 1. The loop technique proposed by von Oppell and Mohr22 (see text)
Figure 2. A different use of a caliper was proposed by Doi et al.28 (see text)
Figure 3. Loops are tied at a predetermined length temporarily fixing them at a specific length using a slit tube, as proposed by Chang et al33
Figure 4. Chan et al36 proposed the use of a covered clip holding the chords at the correct length, allowing them to be tied without movement
Figure 5. Calafiore21 proposed to pull the anterior leaflet (AL) with nerve hooks up to its maximum length and then to tie the artificial chord adding 5 mm to the border of the AL
Figure 6. Maselli et al40 proposed a tuneable loop technique (see text)
Figure 7. Shudo et al20 proposed to tie multiple knots to a normal leaflet scallop so to calculate the number of knots to use in the prolapsing scallop, tying the suture only after filling test, in order to prevent knot-slipping.