121 results about "Chordae tendineae" patented technology

A stentless bioprosthetic valve includes at least one piece of biocompatible material comprising a bi-leaflet conduit having a proximal end and a distal end. The proximal end defines a first annulus for suturing to the valve annulus. The conduit includes first and second leaflets that mimic the native leaflets and extend between the conduit ends. The distal end defines a second annulus at which the first and second leaflets terminate. The conduit further includes first and second pairs of prosthetic chordae projecting from the leaflets at the second annulus. One of the first pair of prosthetic chordae extends from the first leaflet and has a distal end for suturing to a papillary muscle and the other of the first pair of prosthetic chordae extends from the first leaflet and has a distal end for suturing to another papillary muscles.

Novel apparatus and minimally invasive methods to treat atrioventricular valve regurgitation that is a result of tethering of chordae attaching atrioventricular valve leaflets to muscles of the heart, such as papillary muscles and muscles in the heart wall, thereby restricting the closure of the leaflets. Catheter embodiments for delivering and positioning chordal severing and elongating instruments are described.

Described herein are devices, methods and kits for assessing and / or enhancing the accessibility of a subvalvular space of a heart, accessing the subvalvular space of the heart (e.g., to provide access for one or more other devices), and / or positioning one or more devices in the subvalvular space of the heart. The devices described herein may, for example, comprise catheters that may be used to manipulate one or more chordae tendineae, diagnostic catheters having different sizes and / or shapes (e.g., different curvatures), guide catheters having different sizes and / or shapes (e.g., different curvatures), and visualization catheters. In some variations, the devices, methods, and / or kits may be used to visualize a target site, such as a subannular groove of a heart valve. In certain variations, the devices, methods, and / or kits may be used to manipulate chordae tendineae to provide additional space in a ventricle of a heart (e.g., enhancing the accessibility of the ventricle).

Methods and devices for repairing a cardiac valve. A minimally invasive procedure includes creating an access in the apex region of the heart through which one or more instruments may be inserted. The device can implant artificial heart valve chordae tendineae into cardiac valve leaflet tissues to restore proper leaflet function and prevent reperfusion. The device punctures the apex of the heart and travels through the ventricle. The tip of the device rests on the defective valve and punctures the valve leaflet. A suture or a suture / guide wire combination is inserted, securing the top of the leaflet to the apex of the heart. A resilient element or shock absorber mechanism adjacent to the outside of the apex of the heart minimizes the linear travel of the device in response to the beating of the heart or opening / closing of the valve.

Apparatus and methods are provided for thermally and / or mechanically treating tissue, such as valvular structures, to reconfigure or shrink the tissue in a controlled manner. The apparatus comprises a catheter in communication with an end effector which induces a temperature rise in an annulus of tissue surrounding the leaflets of a valve or in the chordae tendineae sufficient to cause shrinkage, thereby causing the valves to close more tightly. Mechanical clips can also be implanted over the valve either alone or after the thermal treatment. The clips are delivered by a catheter and may be configured to traverse directly over the valve itself or to lie partially over the periphery of the valve to prevent obstruction of the valve channel. The clips can be coated with drugs or a radiopaque coating. The catheter can also incorporate sensors or energy delivery devices, e.g., transducers, on its distal end.

Described herein are devices, methods and kits for assessing and / or enhancing the accessibility of a subvalvular space of a heart, accessing the subvalvular space of the heart (e.g., to provide access for one or more other devices), and / or positioning one or more devices in the subvalvular space of the heart. The devices described herein may, for example, comprise catheters that may be used to manipulate one or more chordae tendineae, diagnostic catheters having different sizes and / or shapes (e.g., different curvatures), guide catheters having different sizes and / or shapes (e.g., different curvatures), and visualization catheters. In some variations, the devices, methods, and / or kits may be used to visualize a target site, such as a subannular groove of a heart valve. In certain variations, the devices, methods, and / or kits may be used to manipulate chordae tendineae to provide additional space in a ventricle of a heart (e.g., enhancing the accessibility of the ventricle).

Described herein are devices, methods and kits for assessing and / or enhancing the accessibility of a subvalvular space of a heart, accessing the subvalvular space of the heart (e.g., to provide access for one or more other devices), and / or positioning one or more devices in the subvalvular space of the heart. The devices described herein may, for example, comprise catheters that may be used to manipulate one or more chordae tendineae, diagnostic catheters having different sizes and / or shapes (e.g., different curvatures), guide catheters having different sizes and / or shapes (e.g., different curvatures), and visualization catheters. In some variations, the devices, methods, and / or kits may be used to visualize a target site, such as a subannular groove of a heart valve. In certain variations, the devices, methods, and / or kits may be used to manipulate chordae tendineae to provide additional space in a ventricle of a heart (e.g., enhancing the accessibility of the ventricle).

The invention discloses artificial chordae tendineae and an artificial chordae tendineae implanting system. The artificial chordae tendineae comprises a flexible chordae tendineae main body, wherein the first end and / or the second end of the chordae tendineae main body are / is connected with a fixing element; and a puncture connecting element is arranged at one side, backing to the chordae tendineae main body, of the fixing element. The artificial chordae tendineae implanting system comprises a clamping device, a puncture device and a pushing device, wherein the pushing device comprises a pushing guide pipe; the puncture device and the clamping device are arranged in different inner cavities of the pushing guide pipe in a penetrating way; the clamping device comprises a clamping push rod, afar end clamp head and a near end clamp head; the near end clamp head is arranged at the far end of the pushing guide pipe; the far end clamp head is arranged at the far end of the clamping push rod;the artificial chordae tendineae is accommodated in the clamping device; the fixing element of the artificial chordae tendineae corresponds to a puncture needle head; the puncture device comprises the puncture needle head and a puncture push rod; the puncture push rod is connected with the near end of the puncture needle head; and the far end of the puncture needle head is a cone-shaped straightsharp end. The artificial chordae tendineae and the puncture needle head form stable connection; the puncture point is small; the injury on valve leaflets is reduced; and the operation time is reduced.

The invention relates to an A2 clip for a side-delivered prosthetic mitral valve where the A2 clip is extended using a guide wire to capture native mitral leaflet and / or chordae tissue and withdrawing the guide wire contracts the A2 clip and pins the native tissue against the subannular sidewall of the prosthetic valve.