Heart valve support device and methods for making and using the same
The disclosure relates to a device for supporting functions of a heart valve and methods for making and using the same. The device includes a flow optimizer configured to be located in the valve and having a cross sectional area that reduces a regurgitation orifice of the valve during systole. The device includes an anchoring mechanism coupled to the flow optimizer and configured to fix a position of the flow optimizer relative to the valve. The flow optimizer allows hemodynamic flow during diastole, minimizing risk of inducing atrioventricular pressure gradient and thrombogenesis, and seals or minimizes the regurgitation orifice during systole and reinstates efficacy of the valve. The anchoring system requires no traumatic interaction with the valve, atrium and ventricle. Implantation of the device can be achieved without invasive surgery. The device permits intra-procedural optimization of the positioning of the flow optimizer.
1. A method of assisting a valve of a heart, comprising:
implanting a flow optimizer into a native cardiac valve orifice;
during diastole, reducing a cross-sectional area of the flow optimizer to allow hemodynamic flow around and through the flow optimizer; and
during systole, increasing a cross-sectional area of the flow optimizer to seal the cardiac valve orifice.
2. The method of claim 1 , wherein reducing a cross-sectional area comprises moving a leaflet of the flow optimizer to a concave shape to allow hemodynamic flow around the flow optimizer.
3. The method of claim 1 , wherein reducing a cross-sectional area comprises forming a gap between overlapping circumferential leaflet layers of the flow optimizer to allow hemodynamic flow through the flow optimizer.
4. The method of claim 3 , wherein a first layer of the overlapping circumferential leaflet layers is positioned towards an atrium and wherein a second layer of the overlapping circumferential leaflet layers is positioned towards a ventricle.
5. The method of claim 4 , wherein the second layer is positioned radially outwards of the first layer such that the gap is formed between an atrial end of the second layer and a ventricular end of the first layer.
6. The method of claim 3 , wherein increasing a cross-sectional area comprises closing the gap between the overlapping circumferential layers.
7. The method of claim 1 , wherein increasing a cross-sectional area comprises inflating leaflets of the flow optimizer towards native cardiac valve leaflets during systole.
8. The method of claim 1 , further comprising anchoring the flow optimizer in the native cardiac valve orifice at commissures of native cardiac valve leaflets.
9. The method of claim 1 , further comprising anchoring the flow optimizer in the native cardiac valve orifice by expanding an anchoring mechanism attached to the flow optimizer.
10. The method of claim 1 , wherein the cardiac valve is a tricuspid valve.
11. The method of claim 9 , further comprising adjusting a vertical position of the anchoring mechanism relative to the flow optimizer.
12. The method of claim 9 , wherein expanding an anchoring mechanism attached to the flow optimizer comprises expanding a plurality of anchoring arms at commissures of native cardiac valve leaflets.
13. The method of claim 12 , further comprising rotating one or more of the plurality of anchoring arms to position the anchoring arms relative to one another.
14. The method of claim 12 , further comprising rotating the flow optimizer relative to the plurality of anchoring arms.
15. The method of claim 12 , further comprising individually expanding or contracting one of the plurality of anchoring arms.
16. The method of claim 12 , further comprising locking a position of the plurality of anchoring arms.
17. The method of claim 12 , further comprising locking a position of the flow optimizer relative to the plurality of anchoring arms.
18. The method of claim 1 , further comprising advancing the flow optimizer through a catheter to the valve of the heart.