Device for the implantation and fixation of prosthetic valves

摘要

A device for the transvascular implantation and fixation of prosthetic heart valves having a self-expanding heart valve stent (10) with a prosthetic heart valve (11) at its proximal end is introducible into a patient's main artery. With the objective of optimizing such a device to the extent that the prosthetic heart valve (11) can be implanted into a patient in a minimally-invasive procedure, to ensure optimal positioning accuracy of the prosthesis (11) in the patient's ventricle, the device includes a self-expanding positioning stent (20) introducible into an aortic valve positioned within a patient. The positioning stent is configured separately from the heart valve stent (10) so that the two stents respectively interact in their expanded states such that the heart valve stent (10) is held by the positioning stent (20) in a position in the patient's aorta relative the heart valve predefinable by the positioning stent (20).

主权项

1. A valve prosthesis, comprising:
a first stent component including (i) a first portion disposed at a proximal end of the first stent component that is positionable radially outward from at least a portion of a native leaflet of a native heart valve and radially inward of a vessel wall adjacent the native heart valve when the first stent component is implanted relative to the native heart valve, the first portion including exactly three support struts, and (ii) a second portion disposed at a distal end of the first stent component, opposite the proximal end, wherein the distal end of the first stent component is positioned farther away from a native heart than the proximal end of the first stent component when the first stent component is implanted relative to the native heart valve; a second stent component including (i) a first portion disposed at a proximal end of the second stent component that is positionable radially inward of at least a portion of the native leaflet adjacent the first portion of the first stent component when the second stent component is implanted relative to the native heart valve, and (ii) a second portion disposed at a distal end of the second stent component, opposite the proximal end, wherein the distal end of the second stent component is positioned farther away from the native heart than the proximal end of the second stent component when the second stent component is implanted relative to the native heart valve; and a prosthetic valve component attached to the second stent component.