Device and method for reshaping tricuspid valve annulus
A device for reshaping the tricuspid valve comprises a stent that is deployed in the right ventricular outflow tract (RVOT) adjacent to the tricuspid valve and expanded to a size sufficient to reduce the annular diameter or size of the tricuspid valve, thereby improving coaptation of the leaflets and reducing regurgitation. Embodiments of the device are deliverable percutaneously.
1. A method for reducing tricuspid valve regurgitation, the method comprising:
radially expanding a radially-collapsed stent at a location below a native pulmonary valve such that the entire stent is positioned in a right ventricular outflow tract; and
fixing the stent within the right ventricular outflow tract, the stent positioned adjacent to a native tricuspid valve,
wherein after fixing the stent within the right ventricular outflow tract, an expanded diameter of the stent is larger than an inner diameter of the right ventricular outflow tract, the expanded stent pushing against an anterior region of the tricuspid valve, thereby improving coaption of leaflets of the tricuspid valve.
2. The method of claim 1 , further comprising radially collapsing the stent to a reduced diameter.
3. The method of claim 2 , further comprising coupling the radially-collapsed stent to a distal end portion of an elongate catheter.
4. The method of claim 3 , further comprising advancing the distal end portion of the elongate catheter through a patient's vasculature and delivering the stent into the right ventricular outflow tract.
5. The method of claim 4 , wherein advancing the distal end portion of the elongate catheter through a patient's vasculature comprises advancing the distal end portion of the elongate catheter through a femoral vein.
6. The method of claim 1 , wherein the stent comprises a protrusion along a side of the expanded stent, the protrusion positioned to push against the anterior region of the tricuspid valve after fixing the stent within the right ventricular outflow tract.
7. The method of claim 1 , wherein the stent includes an unobstructed lumen extending longitudinally therethrough.
8. The method of claim 1 , wherein the stent is self-expanding.
9. The method of claim 1 , wherein radially expanding the radially-collapsed stent comprises expanding the radially collapsed stent using a balloon.
10. A method for reducing tricuspid valve regurgitation, the method comprising:
radially collapsing a stent to a reduced diameter;
coupling the radially-collapsed stent to a distal end portion of an elongate catheter;
advancing the distal end portion of the elongate catheter through a patient's vasculature and delivering the stent into a right ventricular outflow tract;
radially expanding the radially-collapsed stent at a location below a native pulmonary valve such that the entire stent is positioned in the right ventricular outflow tract; and
fixing the stent within the right ventricular outflow tract, the stent positioned adjacent to a native tricuspid valve,
wherein after fixing the stent within the right ventricular outflow tract, an expanded diameter of the stent is larger than an inner diameter of the right ventricular outflow tract, and
wherein the stent comprises a protrusion along a side of the expanded stent, the protrusion of the expanded stent positioned to push against an anterior region of the tricuspid valve, thereby improving coaption of leaflets of the tricuspid valve.
11. The method of claim 1 , wherein the stent includes an unobstructed lumen extending longitudinally therethrough.
12. The method of claim 1 , wherein the stent is self-expanding.
13. The method of claim 1 , wherein radially expanding the radially-collapsed stent comprises expanding the radially-collapsed stent using a balloon.