Echo-Doppler assessment of MR. Top: Control group, four animals. Assessments were performed at baseline, after neochordal implant, following discontinuation of cardiopulmonary bypass and at 90 days, prior to sacrifice. The numbers in the boxes indicate how many animals presented with a certain degree of MR at the selected time. Connecting lines show variations of MR degree at each time point. Below are reported average MR degrees at the three time points, with P-value of the statistical differences. Bottom: V-Chordal group, 14 animals. Assessment was performed, with the addition of assessment just following chordal cutting and V-Chordal reimplantation before adjustment. The interpretation of data as above.