Annuloplasty devices and related heart valve repair methods
Devices for repairing and replacing a heart valve in various embodiments, the devices include at least first and second support rings connected together in a coiled configuration to abut opposite sides of a valve annulus. A replacement valve may be secured to the coil-shaped device. Various alternative fastening systems include suture fastening systems, mechanical fastening systems, shape memory alloy fastening systems and other fastening systems relying only on the resilience between adjacent coils. A method generally includes inserting a first end of the coil-shaped member through a valve annulus, rotating a first ring of the coil-shaped member into position on one side of the valve annulus and positioning at least a second ring of the coil-shaped member on an opposite side of the valve annulus.
1. A device for repairing a heart valve comprised of valve tissue including an annulus and a plurality of leaflets for allowing and preventing blood flow, the device comprising:
a catheter having a lumen and an open end,
an elongate valve support member carried within said lumen and movable from said open end, said elongate valve support member having an uncoiled configuration within said lumen and assuming a coiled configuration when extended from said open end, wherein a first portion of said elongate valve support member in the coiled configuration is configured to abut one side of the valve and a second portion of said elongate valve support member in the coiled configuration is configured to abut an opposite side of the valve, whereby a portion of the valve tissue is trapped between said first and second portions.
2. The device of claim 1 , wherein said elongate valve support member includes an inner core covered by an outer layer, said inner core formed from a more rigid material than said outer layer.
3. The device of claim 1 , wherein said elongate valve support member has a generally triangular-shaped cross section.
4. The device of claim 1 further comprising:
an actuator carried within said lumen and operable to extend said elongate valve support member from said open end.
5. The device of claim 4 , wherein said actuator further comprises a gripping element operable to grip and allow releasing of one end of said elongate valve support member.
6. The device of claim 1 , wherein said elongate valve support member is formed from a shape memory alloy.