Conformable prostheses for implanting two-piece heart valves and methods for using them
A heart valve assembly includes an annular prosthesis and a valve prosthesis. The annular prosthesis includes an annular ring for dilating tissue within a biological annulus and a conformable sewing cuff extending radially from the annular member. The valve prosthesis includes a frame and a valve component. The annular ring is introduced into the biological annulus to dilate tissue surrounding the biological annulus and the sewing cuff conforms to tissue above the biological annulus. Fasteners are directed through the sewing cuff to secure the annular prosthesis to the biological annulus. The annular prosthesis may include a baleen element for biasing fabric on the annular ring outwardly to enhance sealing against the biological annulus. A valve prosthesis is then advanced into the sinus cavity, and secured relative to the annular prosthesis. The sewing cuff may enhance a seal between the valve prosthesis and annular prosthesis.
1. A prosthesis for receiving a prosthetic valve, comprising:
an annular member sized for delivery within a biological annulus, the annular member comprising a fabric covering;
a baleen element disposed radially around an outer surface of the annular member and also substantially enclosed within the fabric covering for biasing a portion of the fabric covering outwardly away from the annular member at an angle relative to a longitudinal axis of the annular member;
a sewing cuff extending radially outwardly from an upper portion of the annular member, the sewing cuff comprising a core resiliently conformable with anatomy surrounding the biological annulus and fabric covering at least a portion of the core; and
one or more connectors for engaging a valve prosthesis.
2. A prosthesis for receiving a prosthetic valve, comprising:
an annular member sized for delivery within a biological annulus, the annular member comprising a fabric covering;
a baleen element disposed radially around an outer surface of the annular member and also substantially enclosed within the fabric covering for biasing a portion of the fabric covering outwardly away from the annular member at an angle relative to a longitudinal axis of the annular member;
a sewing cuff extending radially outwardly from the annular member, the sewing cuff comprising a core resiliently conformable with anatomy surrounding the biological annulus and fabric covering at least a portion of the core; and
one or more connectors for engaging a valve prosthesis,
wherein the sewing cuff extends from an upper edge of the annular member, and the baleen element biases the fabric covering radially outwardly along a lower edge of the annular member.
3. The prosthesis of claim 1 , wherein the sewing cuff extends outwardly from an upper edge of the annular member.
4. The prosthesis of claim 1 , wherein the core comprises elastomeric material.