Cardiac valve repair devices with annuloplasty features and associated systems and methods
Cardiac valve repair devices with annuloplasty features and associated systems and methods are disclosed herein. A cardiac valve repair device configured in accordance with embodiments of the present technology can include, for example, an atrial fixation member configured to engage tissue within a left atrium proximate to a native mitral valve and a spring mechanism coupled to an inferior edge portion of the atrial fixation member. The spring mechanism has an extended state with a first length corresponding to a dimension of the atrial fixation member in a deployed state and a relaxed state with a shorter length corresponding to a desired dimension of the native valve annulus. When implanted, the spring mechanism contracts the atrial fixation member such that the native mitral annulus anchored to the atrial fixation member reduces in a cross-sectional dimension.
1 . A method of deploying a valve repair device in a native mitral valve, the method comprising:
positioning a fixation member of the valve repair device against an atrial wall in a left atrium such that a distal edge portion of the fixation member encircles a native mitral valve annulus and a superior portion of the fixation member extends axially from the distal edge portion and engages the atrial wall at a location spaced apart from the native valve annulus, the fixation member forming a central lumen through which blood flows into the native mitral valve and having the superior portion having a superior portion diameter; and
engaging the distal edge portion of the fixation member with tissue of the native mitral valve annulus, the distal edge portion having a distal edge portion diameter less than the superior portion diameter, and the fixation member comprising a spring mechanism coupled to the distal edge portion, wherein—
when the distal edge portion is initially engaged with the native mitral valve annulus, the spring mechanism is in a pre-stretched state having a first length, and
at a time after implantation of the valve repair device, the spring mechanism is configured to move to a relaxed state in which the spring mechanism has a second length shorter than the first length to draw the distal edge portion and the tissue engaged therewith inward to reduce dimensions of the native mitral valve annulus.
2 . The method of claim 1 wherein engaging the distal edge portion comprises extending anchoring elements coupled to the distal edge portion into the tissue of the native mitral valve annulus.
3 . The method of claim 2 wherein extending the anchoring elements into the tissue comprises:
engaging first and second anchoring elements proximate to trigones; and
engaging a third anchoring element proximate to a P2 region of the native mitral valve.
4 . The method of claim 1 , further comprising engaging a proximal edge portion of the fixation member opposite the distal edge portion with the atrial wall in the left atrium.
5 . The method of claim 1 , further comprising tensioning a suture ring to maintain a proximal edge portion of the fixation member opposite the distal edge portion in a collapsed state prior to positioning the distal edge portion.
6 . The method of claim 5 , further comprising releasing tension from the suture ring to allow the proximal edge portion to approach a deployed state.
7 . The method of claim 1 wherein when the distal edge portion is initially engaged, a bioabsorbable material at least partially maintains the spring mechanism in the pre-stretched state.
8 . A method of deploying a valve repair device at a native mitral valve, the method comprising:
positioning a fixation member of the valve repair device against an atrial wall in a left atrium such that the fixation member at least partially encircles an annulus of the native mitral valve, the fixation member providing an opening through which blood flows into the native mitral valve; and
engaging a distal edge portion of the fixation member with tissue of the native mitral valve annulus, the fixation member comprising a spring mechanism coupled to the distal edge portion, wherein—
the spring mechanism is maintained at least partially in a pre-stretched state by a bioabsorbable material, and
at a time after implantation of the valve repair device, the bioabsorbable material is configured to dissolve and allow the spring mechanism to contract to a relaxed state and draw the distal edge portion and the tissue engaged therewith inward to reduce dimensions of the native mitral valve annulus.
9 . The method of claim 8 wherein engaging the distal edge portion comprises extending anchoring elements coupled to the distal edge portion from a delivery state to a deployed state and into the tissue of the native mitral valve annulus.
10 . The method of claim 9 wherein extending the anchoring elements further includes rotating at least one of the anchoring elements with a torqueable shaft from the delivery state to the deployed state.
11 . The method of claim 9 wherein extending the anchoring elements further includes translating at least one of the anchoring elements from the delivery state to the deployed state.
12 . A method of deploying a cardiac repair device at a cardiac valve, the method comprising:
engaging a superior portion of a fixation member of the cardiac repair device with atrial wall tissue at a location spaced apart from a cardiac valve annulus, the fixation member forming a pathway along which blood flows toward or away from the cardiac valve; and
engaging a distal edge portion of the fixation member with tissue of the cardiac valve annulus such that the distal edge portion encircles the cardiac valve annulus, the fixation member comprising a spring mechanism coupled to the distal edge portion, wherein—
when the distal edge portion is initially engaged, the spring mechanism is in an expanded state having a first length, and
at a time after implantation of the cardiac repair device, the spring mechanism is configured to contract to a relaxed state in which the spring mechanism has a second length shorter than the first length to draw the distal edge portion and the tissue engaged therewith inward.
13 . The method of claim 12 wherein the spring mechanism includes a first spring component attached to opposite sides of the distal edge portion, and engaging the distal edge portion further includes placing the first spring component across the cardiac valve annulus.
14 . The method of claim 12 wherein engaging the distal edge portion further includes placing the spring mechanism against the tissue of the cardiac valve annulus.
15 . The method of claim 12 wherein engaging the distal edge portion further includes placing a skirt of the fixation member at the distal edge portion against the tissue of the cardiac valve annulus.
16 . The method of claim 12 wherein engaging the distal edge portion further includes occluding a portion of an orifice of the cardiac valve with a coaptation structure coupled to the fixation member.
17 . The method of claim 12 wherein engaging the distal edge portion further includes positioning the distal edge portion at a native mitral valve in a left atrium.
18 . The method of claim 12 wherein engaging the distal edge portion of the fixation member with the tissue of the cardiac valve annulus further includes arms extending from the distal edge portion contacting the tissue and configured to reduce prolapse of a valve leaflet of the cardiac valve.
19 . The method of claim 18 wherein at least one of the arms is configured to contact the tissue opposite the distal edge portion from the cardiac valve annulus.
20 . The method of claim 18 wherein at least one of the arms is configured to contact the tissue across the cardiac valve annulus from where the at least one of the arms extends from the distal edge portion.