Low profile heart valve delivery system and method
A heart valve delivery system includes a low-profile catheter having an outer sheath, the outer sheath having therein a stent and a replacement heart valve. In an unemployed configuration, the stent is located distally to the replacement heart valve. Upon deployment, however, the stent and replacement heart valve are expanded and the replacement heart valve is situated within the stent.
1. A percutaneous heart valve delivery system having a first configuration and a second configuration, the system comprising:
a sheath;
a stent having a proximal end and a distal end;
a replacement valve having a proximal end and a distal end; and
at least one suture line extending through a lateral side of the replacement valve, a lateral side of the stent, and between the stent and replacement valve;
wherein the stent and replacement valve are disposed within the sheath and the distal end of the replacement valve is proximal to the proximal end of the stent, when the system is in the first configuration;
wherein the distal end of the replacement valve is distal to the proximal end of the stent, when the system is in the second configuration;
wherein the proximal end of the replacement valve extends radially outward from a longitudinal centerline of the replacement valve farther than the distal end of the replacement valve, when the system is in the second configuration;
wherein pulling proximally on the at least one suture line shifts the system from the first configuration to the second configuration by translating the replacement valve distally toward the stent.
2. The system of claim 1 , wherein the replacement heart valve is self-expanding.
3. The system of claim 1 , further comprising at least one pull line, wherein the sheath has a proximal end and a distal end and the at least one pull line extends beyond the proximal end of the sheath.
4. The system of claim 1 , wherein the at least one suture line comprises between six and twenty suture lines.
5. The system of claim 4 further comprising a plurality of pull lines, each of the pull lines connected to one of the suture lines when the system is in the first configuration.
6. The system of claim 1 , wherein at least a portion of the at least one suture line comprises a bioabsorbable material.
7. The system of claim 1 , wherein the stent includes a locking slot disposed adjacent the distal end thereof.
8. The system of claim 7 , wherein the locking slot is annularly shaped.
9. The system of claim 7 , wherein the locking slot is disposed within the stent.
10. The system of claim 9 , wherein the locking slot opens radially inwardly into a lumen extending through the stent.
11. The system of claim 7 , wherein the replacement valve includes a protruding member disposed adjacent the distal end thereof.
12. The system of claim 11 , wherein the protruding member extends radially outward from the replacement valve.
13. The system of claim 11 , wherein the protruding member is annularly shaped.
14. The system of claim 11 , wherein the protruding member is configured to matingly engage the locking slot, when the system is in the second configuration.
15. The system of claim 1 , wherein the distal end of the replacement valve extends distally of the distal end of the stent, when the system is in the second configuration.
16. The system of claim 1 , wherein the proximal end of the stent extends proximally of the proximal end of the replacement valve, when the system is in the second configuration.
17. The system of claim 1 , wherein the stent is self-expanding.