65 results about "Mitral Valve Annulus" patented technology

A medical apparatus and method suitable for remodeling a mitral valve annulus adjacent to the coronary sinus. The apparatus comprises an elongate body having a proximal region and a distal region. Each of the proximal and distal regions is dimensioned to reside completely within the vascular system. The elongate body may be moved from a first configuration for transluminal delivery to at least a portion of the coronary sinus to a second configuration for remodeling the mitral valve annulus proximate the coronary sinus. A forming element may be attached to the elongate body for manipulating the elongate body from the first transluminal configuration to the second remodeling configuration. Further, the elongate body may comprise a tube having a plurality of transverse slots therein.

A device, system, and method effects mitral valve annulus geometry of a heart. The device includes a first anchor configured to be positioned within and fixed to the coronary sinus of the heart adjacent the mitral valve annulus within the heart. A cable is fixed to the first anchor and extends proximately therefrom and slidingly through a second anchor which is positioned and fixed in the heart proximal to the first anchor. A lock locks the cable to the second anchor when tension is applied to the cable for effecting the mitral valve annulus geometry.

A method and apparatus for treating mitral regurgitation by approximating the septal and lateral (clinically referred to as anterior and posterior) annulus of the mitral valve. The distal end of the device is inserted into the coronary sinus of the heart and the proximal end of the device rests within the right atrium along the tendon of Todaro and extends to at least the membranous septum of the tricuspid valve. Because the coronary sinus approximates the lateral (posterior) annulus of the mitral valve and the tendon of Todaro approximates the septal (anterior) annulus of the mitral valve, the device encircles approximately one half of the mitral valve annulus. The apparatus is then adapted to deform the underlying structures i.e. the septal annulus and lateral annulus of the mitral valve in order to move the posterior leaflet anteriorly and the anterior leaflet posteriorly and thereby improve leaflet coaptation and eliminate mitral regurgitation.

Prosthetic mitral heart valves and anchors for use with such valves are provided that allow for an improved implantation procedure. In various embodiments, a helical anchoring device is formed as a coiled or twisted anchor that includes one or more turns that twist or curve around a central axis. Curved arms attached to the frame of the valve guide the helical anchoring device into position beneath the valve leaflets and around the mitral valve annulus as it exits the delivery catheter, and the expandable prosthetic mitral valve is held within the coil of the anchoring device. The anchoring device and the valve can be delivered together, simplifying the valve replacement procedure.

Unique semi-circular papillary muscle and annulus bands are described that are useful for modifying the alignment of papillary muscles, a mitral valve annulus and / or a tricuspid valve annulus. Methods to effect the alignment are also described and an unique sizing device that can be used for such alignment is described.

Methods and devices for reshaping or reforming tissue, such as a mitral valve of a heart, are described. An implant includes a generally flexible body and a plurality of magnetic portions such that the magnetic portions interact to cause a change in the shape of the implant, which, in turn, effects a change in shape of the subject tissue. In one example, at least one implant is positioned within a coronary sinus to affect the shape of the mitral valve annulus. The implant may further include fixation mechanisms for securing the implant within a vessel and may provide for removability after desired deformation of the subject tissue has taken place.

Tissue shaping methods and devices are provided. The devices can be adjusted within the body of a patient in a less invasive or non-invasive manner, such as by applying energy percutaneously or external to the patient's body. In one example, the device is positioned within the coronary sinus of the patient so as to effect changes in at least one dimension of the mitral valve annulus. The device may also advantageously include a shape memory material that is responsive to changes in temperature and / or exposure to a magnetic field. In one example, the shape memory material is responsive to energy, such as electromagnetic or acoustic energy, applied from an energy source located outside the coronary sinus. A material having enhanced absorption characteristics with respect to the desired heating energy may also be used to facilitate heating and adjustment of the tissue shaping device.

Mitral valve insufficiency is treated by introducing an expansible device such as a balloon bearing an ultrasonic transducer into the heart so that the transducer is positioned adjacent the mitral annulus but spaced from the mitral annulus, and actuating the transducer to heat the mitral annulus, denature collagen in the annulus and thereby shrink the annulus.

A system for treating mitral valve regurgitation includes a tensioning device having a plurality of helical anchors and a tensioning filament. One embodiment of the invention includes a method for attaching a tensioning device to the annulus of a mitral valve in a trans-leaflet configuration, and applying a tension force to the tension filament in order to exert force vectors on the annulus, thereby reshaping the mitral valve annulus so that the coaption of the anterior and posterior leaflets of the mitral is improved during ventricular contraction.

A system for treating mitral valve regurgitation includes a tensioning device having a plurality of helical anchors and a tensioning filament. One embodiment of the invention includes a method for attaching a tensioning device to the annulus of a mitral valve in a trans-leaflet configuration, and applying a tension force to the tension filament in order to exert force vectors on the annulus, thereby reshaping the mitral valve annulus so that the coaption of the anterior and posterior leaflets of the mitral is improved during ventricular contraction.

A device, a kit and a method are presented for permanently augmenting the pump function of the left heart. The basis for the presented innovation is an augmentation of the physiologically up and down movement of the mitral valve during each heart cycle. By means of catheter technique, minimal surgery, or open heart surgery implants are inserted into the left ventricle, the mitral valve annulus, the left atrium and adjacent tissue in order to augment the natural up and down movement of the mitral valve and thereby increasing the left ventricular diastolic filling and the piston effect of the closed mitral valve when moving towards the apex of said heart in systole and / or away from said apex in diastole.

Embodiments of an apparatus for treating a deficient mitral valve include an expandable spacer configured for placement between the native leaflets of the mitral valve, the spacer anchorable to a wall of the ventricle. Methods and apparatus for delivering and implanting the prosthetic are also described.

A method is provided, including, during a percutaneous transcatheter procedure, placing an annuloplasty device entirely around an annulus of a mitral valve of a subject in a closed loop. The annuloplasty device includes a flexible sleeve, which is fastened to the annulus by coupling a plurality of tissue anchors to a posterior portion of the annulus, without coupling any tissue anchors to any anterior portion of the annulus between left and right fibrous trigones of the annulus. After (a) placing the annuloplasty device entirely around the annulus in the closed loop and (b) fastening the flexible sleeve to the annulus, a longitudinal portion of the flexible sleeve is longitudinally contracted. Other embodiments are also described.

An improved medical implant for treating mitral regurgitation is provided. The medical implant comprises proximal and distal anchors connected by a bridge. The medical implant is configured to be delivered into a coronary sinus using a minimially invasive procedure. The bridge is preferably made of a shape memory material which is biased to contract after the implant is delivered. The medical implant further comprises a reinforcement mechanism configured to limit stresses and strains along the length of the bridge. In a preferred embodiment, the reinforcement mechanism is fixed to a plurality of attachment points along the bridge, thereby preventing excessive elongation between any two attachment points. A resorbable material is preferably disposed within gaps along the length of the bridge to temporarily maintain the bridge in an elongated condition. After the proximal and distal anchors are secured in the coronary sinus, the resorbable material gradually resorbs, thereby creating tension in the bridge which applies a force along the mitral valve annulus. The reinforcement mechanism ensures that stresses and strains and distributed evenly while the bridge is in tension.

A method for delivering a platform for reinforcing an annulus of a mitral valve: Passing a catheter having a sheath covering a tube formed from a metal into the left atrium, the tube including: an annular portion defining at least one opening, a plurality of upper elements attached to an upper perimeter of the annular portion and extending axially, and a plurality of lower elements attached to a lower perimeter of the annular portion. Inserting the tube into the annulus of the mitral valve; withdrawing the sheath, but leaving the sheath covering the annular portion and the upper elements; bending the lower elements until the lower elements extend radially so as to be positioned beneath the mitral valve; then withdrawing the sheath from covering the annular portion and the upper elements; bending the upper elements until the upper elements extend radially so as to be positioned above the mitral valve.

A mitral valve annulus reshaping device includes at least a portion that is formed of a biocompatible shape memory alloy SMA having a characteristic temperature, Af, that is preferably below body temperature. The device is constrained in an unstable martensite (UM) state while being introduced through a catheter that passes through the venous system and into the coronary sinus of the heart. The reshaping device is deployed adjacent to the mitral valve annulus of the heart as it is forced from the catheter. When released from the constraint of the catheter, the SMA of the device at least partially converts from the UM state to an austenitic state and attempts to change to a programmed shape that exerts a force on the adjacent tissue and modifies the shape of the annulus. The strain of the SMA can be varied when the device is within the coronary sinus.

Methods and devices for reducing paravalvular leakage associated with a replacement mitral valve. The methods can include monitoring for paravalvular leakage between a replacement mitral valve and tissue proximate the mitral valve annulus; if a sufficient amount of paravalvular leakage is observed, deploying a tissue reshaping device at least partially within a coronary sinus; remodeling coronary sinus tissue with the tissue reshaping device to remodel at least one of mitral valve annulus tissue, at least one mitral valve leaflet, and left atrium tissue in an attempt to reduce the paravalvular leakage; and monitoring for a reduction in paravalvular leakage after the remodeling step.

Mitral valve implants and devices, kits and methods are provided for mitral valve repair. Devices comprise a body attachable onto the mitral valve annulus and a bridge connected to the body by two legs which are configured to support and position the bridge within a left ventricle (LV) of the patient when the device body is implanted, so that the legs and the bridge avoid contact with the LV walls, papillary muscles and chordae during operation of the heart. The bridge may be used to anchor valve leaflet tissue, provide support for leaflet re-modelling, possibly using external tissue, and / or anchor artificial chords used to modify and repair the operation of the mitral valve. Related medical procedures as well as kits and related utensils are also provided.

The invention relates to a valve annulus retractor, comprising a fixing nail, a nailing device, a connecting line, a knotter and a line cutter. The fixing nail comprises a screw needle and a fixing head, the screw needle is fixed on a proximal end of the fixing head, and the fixing head comprises a spiral segment and a contact spiral end at a distal end; the nailing device comprises an outer tubeand a rotary push member, the inner wall of the outer tube is provided with an internal thread matched with the spiral segment, and the proximal end of the rotary push member is provided with a structure matched with the contact spiral segment. During nailing, the fixing nail is assembled in the outer tube and cooperates with the rotary push member to screw to the proximal end of the outer tube, the connecting line is connected with the fixing head, and the connecting line is knotted by the knotter and cut by the line cutter. The valve annulus retractor of the invention can realize effective contraction treatment for a mitral valve annulus or a tricuspid annulus to reduce the reflux of a valve, the operation is simple and the safety is high.