Heart valve prostheses having multiple support arms and methods for percutaneous heart valve replacement

Patent metadata

Field	Value
Publication number	US-11278397-B2
Application number	US-201916403769-A
Country	US
Kind code	B2
Filing date	May 6, 2019
Priority date	Feb 1, 2016
Publication date	Mar 22, 2022
Grant date	Mar 22, 2022

Abstract

Prosthetic heart valve devices and associated methods for percutaneous or transcatheter heart valve replacement are disclosed herein. A heart valve prosthesis configured in accordance herewith includes a frame having a valve support and a plurality of support arms extending therefrom. The plurality of support arms may include a main support arm configured to extend from the valve support for capturing at least a portion of a valve leaflet of a native heart valve therebetween when the valve prosthesis is in an expanded configuration and deployed within the native heart valve. In addition, the plurality of support arms may include multiple supplemental support arms disposed about the circumference of the valve support that when deployed in the expanded configuration are configured to at least partially engage subannular tissue at the native heart valve.

First claim

What is claimed is:

1. A method of deploying a valve prosthesis having a compressed configuration for delivery to a treatment site and an expanded configuration for deployment within a heart comprising:
providing transatrial access to a left atrium of the heart;
advancing a distal portion of a delivery catheter having the valve prosthesis in the compressed configuration therein into the left atrium via the transatrial access, wherein the valve prosthesis includes a frame having a main support arm and a plurality of supplemental support arms;
deploying within the left atrium the main support arm and the plurality of supplemental support arms of the valve prosthesis such that the main support arm and each of the plurality of supplemental support arms assumes a bent deployed state as it extends from the distal portion of the delivery catheter;
advancing the distal portion of the delivery catheter toward an annulus of a native mitral valve of the heart until the main support arm and the plurality of supplemental support arms in the bent deployed state are pushed through the annulus and into a left ventricle of the heart;
proximally retracting the delivery catheter until each of the main support arm and the plurality of supplemental support arms engages at least a portion of an anterior leaflet of the native mitral valve or a portion of posterior leaflet of the native mitral valve; and
deploying a remainder of the valve prosthesis from the delivery catheter to replace the native mitral valve.

2. The method of claim 1 , further comprising:
orienting the main support arm of the valve prosthesis with an A 2 segment of the anterior leaflet of the native mitral valve prior to performing the step of advancing the distal portion of the delivery catheter toward an annulus of the native mitral valve.

3. The method of claim 2 , wherein during the step of proximally retracting the delivery catheter the main support arm of the valve prosthesis is configured to engage and capture the anterior leaflet at the A 2 segment prior to the plurality of supplemental support arms engaging remaining segments of the anterior leaflet or segments of the posterior leaflet.

4. The method of claim 1 , wherein during the step of proximally retracting the delivery catheter end portions of the plurality of supplemental support arms are forced against the annulus and the force is maintained against the annulus while the step of deploying a remainder of the valve prosthesis is performed.

5. The method of claim 4 , wherein the step of deploying a remainder of the valve prosthesis includes releasing within the left atrium an inlet section of the frame of the valve prosthesis to act against a floor of the left atrium in opposition to the plurality of supplemental support arms that act against an inferior side of the annulus to thereby anchor the valve prosthesis within the native mitral valve.

6. The method of claim 1 ,
wherein the frame further includes a tubular portion for retaining a prosthetic valve component therein, the tubular portion having a first end and a second end and an inflow portion that radially extends from the first end of the tubular portion when the valve prosthesis is in the expanded configuration,
wherein the main support arm extends from the second end of the tubular portion and has a first length, the main support arm including a first arm segment coupled to the second end of the tubular portion at a first attachment point and a second attachment point and the first arm segment defining a first loop between the first and second attachment points, the first length being defined between a terminal tip of the first loop and the first attachment point,
wherein the plurality of supplemental support arms include
a first set of supplemental support arms extending from the second end of the tubular portion, wherein each of the first set of supplemental support arms has a second length and wherein each of the first set of supplemental support arms includes a second arm segment coupled to the second end of the tubular portion at a third attachment point and a fourth attachment point and the second arm segment defines a second loop between the third and fourth attachment points, the second length being defined between a terminal tip of the second loop and the third attachment point, and
a second set of supplemental support arms extending from the second end of the tubular portion, wherein each of the second set of supplemental support arms includes a third arm segment coupled to the second end of the tubular portion at a fifth attachment point and a sixth attachment point and the third arm segment defines a third loop between the fifth and sixth attachment points, and wherein each of the second set of supplemental support arms has a third length that is less than the second length, the third length being defined between a terminal tip of the third loop and the fifth attachment point,

wherein the first length of the main support arm is longer than the respective second and third lengths of the supplemental support arms in the first and second sets of supplemental support arms.

7. The method of claim 6 , wherein when the valve prosthesis is in the expanded configuration the main support arm and the first set of supplemental support arms engage the anterior leaflet of the native mitral valve and the second set of supplemental support arms engage the posterior leaflet of the native mitral valve.

8. The method of claim 6 , wherein when the valve prosthesis is in the expanded configuration each of the supplemental support arms has substantially the same deployed height relative to the second end of the tubular portion of the frame such that the terminal tip of each supplemental support arm of the first set of supplemental support arms is at the same longitudinal position as the terminal tip of each supplemental support arm of the second set of supplemental support arms.

9. The method of claim 8 , wherein when the valve prosthesis is in the expanded configuration each end portion of the supplemental support arms is disposed adjacent to an inflow portion of the frame so as to pinch tissue of the heart therebetween.

10. The method of claim 8 , wherein the plurality of supplemental support arms include a first set of supplemental support arms and a second set of supplemental support arms, and wherein in the bent deployed state
a first angle is defined between the main support arm and a tubular portion of the frame,
a second angle is defined between each supplemental support arm of the first set of supplemental support arms and the tubular portion of the frame, and
a third angle is defined between each supplemental support arm of the second set of supplemental support arms and the tubular portion of the frame,
wherein the first angle is greater than the second angle and the second angle is greater than the third angle.

11. The method of claim 1 , wherein in the bent deployed state the main support arm and the supplemental support arms bend toward an inflow portion of the frame.

12. A method of deploying a valve prosthesis having a compressed configuration for delivery to a treatment site and an expanded configuration for deployment within a heart comprising:
providing access to a left atrium of the heart;
advancing a distal portion of a delivery catheter having the valve prosthesis in the compressed configuration therein into the left atrium via the access, wherein the valve prosthesis includes a frame having
a valve support with a first end and a second end,
an inflow portion that radially extends from the first end of the valve support when the valve prosthesis is in the expanded configuration,
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Assignees

• Medtronic Inc

Inventors

• Quill Jason
• Savage Padraig
• Dwork Joshua
• Garde Kshitija
• Ahlberg Sarah
• Kovalsky Igor

Classifications

• A61F2230/001

  Figure-8-shaped, e.g. hourglass-shaped · CPC title

• A61F2250/0037

  differing in height or in length · CPC title

• A61F2/2427 Primary

  Devices for manipulating or deploying heart valves during implantation · CPC title

• A61F2/2418 Primary

  Scaffolds therefor, e.g. support stents · CPC title

• A61F2/243

  Deployment by mechanical expansion · CPC title