Device and method for heart valve repair
The invention provides a device ( 50 ) and system for treating a heart valve having an anchor ( 54, 56 ) and one or more sutures attached to the anchor. The anchor has an expanded deployed configuration and a low caliber undeployed configuration. A delivery in a heart includes catheter and a needle slidable in the lumen of the catheter. The distal end of the catheter is inserted through the myocardium of the heart until the catheter tip is juxtaposed to the underside of the valve leaflet to be treated. The leaflet is then pierced with tip of the needle. The needle is pushed until the anchor in its undeployed configuration passes through the needle tip and is released from the catheter. The anchor is then brought to its deployed configuration on one or both surfaces of the valve leaflet.
1. A device for treating a heart valve comprising:
(a) an anchor portion comprising
a central hub configured for plugging a piercing formed in the valve leaflet, wherein said central hub is closed at one end thereof; and
a first plurality of closed wire loops and a second plurality of closed wire loops extending from the central hub;
the anchor portion having an expanded deployed configuration and a low caliber undeployed configuration the anchor portion configured for anchoring the device onto a valve leaflet in the expanded deployed configuration, such that when in situ (i) the central hub is positioned in the piercing, (ii) the first plurality of closed wire loops is positioned above the valve leaflet and (iii) the second plurality of closed wire loops is positioned below the valve leaflet; and
(b) one or more sutures attached to the anchor portion at the central hub, the sutures extending away from the first plurality of closed wire loops and from the second plurality of closed wire loops, the sutures being configured and of a length sufficient to enable the sutures to function as prosthetic chordates when fixed to the myocardium.
2. The device according to claim 1 , wherein, in the low caliber undeployed configuration, said first plurality of closed wire loops are collapsed away from the sutures and said second plurality of closed wire loops are collapsed towards the sutures.
3. The device according to claim 1 , wherein each one of said first plurality of closed wire loops and said second plurality of closed wire loops comprises two or more said closed wire loops.
4. The device according to claim 3 , wherein the anchor portion in the deployed configuration comprises said first plurality of closed wire loops lying in a first plane and said second plurality of closed wire loops not lying in the first plane.
5. The device according to claim 4 , wherein said second plurality of closed wire loops are curved towards the first plane.
6. A system for treating a heart valve comprising:
(a) a device for treating a heart valve comprising:
(i) an anchor portion comprising
a central hub configured for plugging a piercing formed in the valve leaflet, wherein said central hub is closed at one end thereof; and
a first plurality of closed wire loops and a second plurality of closed wire loops extending from the central hub;
the anchor portion having an expanded deployed configuration and a low caliber undeployed configuration the anchor portion configured for anchoring the device onto a valve leaflet in the expanded deployed configuration, such that when in situ (i) the central hub is positioned in the piercing, (ii) the first plurality of closed wire loops is positioned above the valve leaflet and (iii) the second plurality of closed wire loops is positioned below the valve leaflet; and
(ii) one or more sutures attached to the anchor portion at the central hub, the sutures extending away from the first plurality of closed wire loops and from the second plurality of closed wire loops, the sutures being configured and of a length sufficient to enable the sutures to function as prosthetic chordates when fixed to the myocardium;
(b) a delivery catheter having a catheter lumen having proximal end and a distal end; and
(c) a needle slidable in the catheter lumen, the needle having a needle lumen dimensioned to receive the device in the low caliber configuration of the device, the needle further having a sharp tip.
7. The system according to claim 6 , further comprising a rod configured to push the device in the needle lumen towards the distal end of the catheter.
8. The system according to claim 6 , wherein the distal end of the catheter is provided with a spiral wire.
9. The system according to claim 6 , wherein the distal end of the catheter is provided with an inflatable balloon that is visible in echocardiography.
10. A method for treating a heart valve comprising:
(a) providing a system for treating a heart valve comprising:
i) a device for treating a heart valve comprising:
an anchor portion comprising
a central hub configured for plugging a piercing formed in the valve leaflet, wherein said central hub is closed at one end thereof; and
a first plurality of closed wire loops and a second plurality of closed wire loops extending from the central hub;
the anchor portion having an expanded deployed configuration and a low caliber undeployed configuration, the anchor portion configured for anchoring the device onto a valve leaflet in the expanded deployed configuration, such that when in situ (i) the central hub is positioned in the piercing, (ii) the first plurality of closed wire loops is positioned above the valve leaflet and (iii) the second plurality of closed wire loops is positioned below the valve leaflet; and
one or more sutures attached to the anchor portion at the central hub, the sutures extending away from the first plurality of closed wire loops and from the second plurality of closed wire loops, the sutures being configured and of a length sufficient to enable the sutures to function as prosthetic chordates when fixed to the myocardium;
ii) a delivery catheter having a catheter lumen having proximal end and a distal end;
iii) a needle slidable in the catheter lumen, the needle having a needle lumen dimensioned to receive the device in the low caliber configuration of the device, the needle further having a sharp tip; and
iv) a rod configured to push the device in the needle lumen towards the distal end of the catheter;
(b) inserting the device into the delivery system;
(c) inserting the distal end of the catheter through myocardium of the heart, until the catheter tip is juxtaposed to the underside of the leaflet;
(d) piercing the leaflet with the sharp tip of the needle;
(e) pushing the rod towards the tip of the needle until the anchor portion in its undeployed configuration passes through the needle tip and is released from the catheter;
(f) bringing the anchor portion to its deployed configuration with said first plurality of closed wire loops on one surfaces of the valve leaflet and with said second plurality of closed wire loops on another surface of the valve leaflet.