Mitral valve repair

Kalios is the first mitral annuloplasty device that can be percutaneously adjusted to optimize valve repair at any time after implant, repeatedly, and while the heart is beating, thus avoid the need for further surgery.


Mitral regurgitation is a condition in which partial back-flow of blood occurs from the left ventricle to the left atrium during systole. This takes place when the mitral leaflets do not close properly due to inadequate contact, or coaptation, between them.

Kalios can be implanted as a conventional “Carpentier” ring to perform a normal annuloplasty procedure. In the case of recurrent mitral regurgitation, months or years after the initial surgery and when the implant is fully stabilized under a layer of cellular ingrowth, it is still possible to adjust the device and improve coaptation as required.


During implantation, the distal end of the connection line is routed to a subclavian position.

In the event of residual regurgitation, the spacing mandrel is retrieved from the hollow structure of the ring through the connection line.

A three-balloon catheter is then inserted in its place from the distal end of the connection line and is progressively inflated in up to three predefined anatomical zones, called P1, P2 and P3, to bring the valve leaflets closer together. Adjustment is performed under echography in the zones of insufficient contact and involves displacing the annulus to the desired level to eliminate residual regurgitation.

Maximum reduction of the valve orifice area, with full adjustment being performed in all three zones (P1, P2 and P3) is limited to around 15% to prevent any risk of valve stenosis

The distal end of the connection line is retrieved from its subcutaneous position in the subclavian region. The spacing mandrel is removed, and the three-balloon catheter introduced. Adjustment is then performed by means of the same procedure as that used for peri-operative adjustment.

Adjustment of the Kalios annuloplasty device can be repeated several times post-operatively, up to maximum expansion of the P1, P2 and P3 zones.