Implantable Transcatheter Intracardiac Devices and Methods For Treating Incompetent Atrioventricular Valves
Heart valve implants and methods utilizing those valves designed to reduce or eliminate the regurgitant jet associated with an incompetent atrioventricular valve. The heart valve implants, which are deployed via a transcatheter venous approach, comprise a collapsible framework connected to an anchored guide shaft, a valve portion and an apron which permits ingrowth of native heart tissue into the apron.
1 . A heart valve implant comprising:
a valve connector;
a framework connected to valve connector and extending radially outwardly from said valve connector;
a flexible valve portion connected to said framework and disposed proximate to and distally of said framework, at least a portion of said valve portion is movable away from said framework to allow blood flow during diastole and into contact with said framework to impede blood flow during systole; and
an apron connected to said framework and disposed proximate to and distally of at least a portion of said framework, said apron comprising material which permits ingrowth of native heart tissue such that said valve portion works in cooperation with said native heart valve.
2 . A heart valve implant according to claim 1 wherein said valve connector comprises a substantially hollow tube.
3 . A heart valve implant according to claim 1 wherein said framework comprises at least eight collapsible fingers.
4 . A heart valve implant according to claim 1 wherein said first portion of said framework comprises fingers disposed at an angle of about 90° to about 170° to a longitudinal axis passing through the center of said valve connector.
5 . A heart valve implant according to claim 1 wherein said framework comprises a first portion extending radially outwardly from said valve connector and a second portion extending further radially outwardly from said first portion of said framework.
6 . A heart valve implant according to claim 5 wherein said second portion of said framework is disposed at an angle of about 100° to about 170° to said first portion of said framework.
7 . A heart valve implant according to claim 5 wherein said framework comprises collapsible fingers, said first portion and said second portion of said framework comprising sections of said fingers such that each of said fingers comprises an inner portion and an outer portion, said fingers further comprise tips which are angled proximally relative to said second portion.
8 . A heart valve implant according to claim 5 wherein said framework comprises collapsible fingers, said first portion and said second portion of said framework comprising sections of said fingers such that each of said fingers comprises a center portion and an outer portion, said fingers further comprise tips which are curved proximally relative to said second portion.
9 . A heart valve implant according to claim 5 wherein said framework comprises at least eight collapsible fingers, said first portion and said second portion of said framework comprising sections of said fingers such that each of said fingers comprises an inner portion and an outer portion, wherein said outer portion is disposed at an angle of less than 90° with a longitudinal axis passing through the center of said valve connector.
10 . A heart valve implant according to claim 1 wherein said apron comprises a material selected from the group consisting of expanded PTFE, porcine tissue, bovine tissue and canine tissue.
11 . A heart valve implant according to claim 1 wherein said valve portion comprises a ring portion and a plurality of leaflets.
12 . A heart valve implant according to claim 11 wherein said leaflets are integrally formed with said ring portion.
13 . A heart valve implant according to claim 1 wherein said valve portion comprises discernible markers which can be detected radiographically during surgery.
14 . A method of deploying a heart valve implant in a patient comprising the steps of:
providing a heart valve implant comprising:
a guide shaft comprising a distal end and a proximal end;
an anchor coupled to said guide shaft proximate said distal end;
a valve connector connected to said guide shaft;
a framework connected to valve connector and extending radially outwardly from said valve connector;
said framework comprising a first portion extending radially outwardly from said valve connector and a second portion extending further radially outwardly from said first portion of said framework;
a valve portion connected to said framework and disposed proximate to and distally of said first portion of said framework; and
an apron connected to said framework and disposed proximate to and distally of said second portion of said framework, said apron comprising material which permits ingrowth of native heart tissue;
positioning said heart valve implant at least partially within a heart via a transcatheter venous procedure; and
securing said anchor to native heart tissue.
15 . A method of deploying a heart valve implant in a patient according to claim 14 further comprising the step of adjusting the position of the valve portion relative to said guide shaft.
16 . A method of deploying a heart valve implant in a patient according to claim 15 wherein said adjusting step comprises changing the position of said valve portion relative to said guide shaft.
17 . A method according to claim 14 further comprising the step of positioning said valve portion in contact with native heart leaflets.
18 . A method according to claim 14 further comprising the step of positioning said valve portion adjacent said native heart leaflets.
19 . A method according to claim 14 further comprising the step of positioning said valve portion within with native heart leaflets.
20 . A method according to claim 14 further comprising the step of stapling said apron to the native atrial annulus.