20 results about "Mitral anulus" patented technology

The invention provides a left heart data analysis method and system based on image segmentation, and relates to the technical field of medical image processing. Comprising the following steps: acquiring cardiac ultrasound image data and preprocessing; performing image segmentation on the preprocessed image data to obtain a segmentation result including a left ventricle, a left ventricular wall and a left atrium; searching a boundary line of the left ventricle and the left atrium, selecting two boundary points corresponding to the minimum and maximum abscissas in the boundary line as left and right mitral valve ring points respectively, and establishing a long axis based on the mitral valve ring midpoint and the cardiac apex point; modeling the ventricle into a structure formed by superposing a plurality of discs along the long axis direction, and obtaining the diameter of the corresponding disc; based on the obtained diameters of the corresponding discs, the left ventricular volumes in the diastolic period and the systolic period are calculated respectively, and the left ventricular ejection fraction is calculated. According to the method, image segmentation and geometric modeling are fused to achieve accurate calculation of the cardiac ejection fraction, meanwhile, the accuracy of cardiac structure image segmentation is improved, and an interpretable ejection fraction estimation process is achieved.

Mitral valve prolapse and mitral regurgitation can be treating by implanting in the mitral annulus a transvalvular intraannular band. The band has a first end, a first anchoring portion located proximate the first end, a second end, a second anchoring portion located proximate the second end, and a central portion. The central portion is positioned so that it extends transversely across a coaptive edge formed by the closure of the mitral valve leaflets. The band may be implanted via translumenal access or via thoracotomy.

This invention provides an apparatus for repairing heart valves and a method for implanting anchors and repairing heart valves. The apparatus includes: a body; a component attached to the body at a first end and having a plurality of positioning cords extending laterally across a space between the component and away from a second end of the component opposite to the first end; a tube suspended from the plurality of positioning cords; and an adjustment cord extending through the tube. The method includes: implanting at least one annular anchor into the mitral valve annulus of a heart valve; implanting papillary anchors through each papillary muscle of the heart; delivering and positioning the apparatus for repairing the heart valve within the heart valve using at least one annular anchor and papillary anchors; and adjusting the apparatus to adjust the degree of atrial displacement of the mitral valve leaflets during ventricular systole.

An annuloplasty band and method of implantation. The band is shaped and sized to avoid the adjacent aortic valve structure and better protects against dehiscence along the muscular mitral annulus. The band is asymmetric and when implanted spans more around the side of the mitral annulus having the posterior commissure than the side with the anterior commissure. The band has a saddle shape with a posterior upward bow centered on a minor axis of the mitral annulus, and a span extending clockwise therefrom is longer than a span extending counter-clockwise. The longer span may be 150° while the shorter span extends 90°. A set of rings may have different saddle profiles and different plan view shapes for different sized bands. A method includes implanting so that the band extends over the posterior leaflet and a short distance past the posterior commissure outside of the anterior leaflet.

Systems and methods of atrioventricular valve replacement are provided. In various embodiments, an arch-like support structure is provided that is insertable and implantable into a heart and is positioned in the mitral annulus to replace a native mitral valve. The support structure is operable to support, and various systems comprise leaflet and chord structures operable to control and regular blood flow between chambers of the heart.

Disclosed herein are heart valve repair devices with annuloplasty features and related systems and methods. A heart valve repair device configured in accordance with embodiments of the present technology may include, for example, an atrial fixation member configured to engage tissue within the left atrium near a native mitral valve and a spring mechanism coupled to a lower edge portion of the atrial fixation member. The spring mechanism has an extended state having a first length corresponding to the size of the atrial fixation member in an expanded state and a relaxed state having a shorter length corresponding to a desired size of the native annulus. When implanted, the spring mechanism contracts the atrial fixation member such that the cross-sectional size of the native mitral annulus anchored to the atrial fixation member is reduced.

Annuloplasty rings that are size-adjustable after implant and which facilitate deployment and reduce long-term complications. The rings each have a hollow circumference with a cinching element extending therethrough whose length is controlled remotely via a deployment system handle. The ring may be anchored to the annulus and then the size adjusted while the heart beats and under visualization to minimize regurgitation. The cinching element may be a loop of metal which is clamped to size within a junction housing to which the deployment system attaches. The rings are especially beneficial for repairing the mitral annulus, and may be saddle shaped with the junction housing located on an anterior side.

The present invention provides an artificial heart valve comprising a main stent and an artificial valve leaflet, wherein an outflow end of the main stent is connected to an inflow end of the artificial valve leaflet, and when the artificial heart valve is implanted in the heart, the main stent is fixed on a mitral valve annulus above a native posterior leaflet of mitral valve leaflets, and the artificial valve leaflet is sealed against an inner side of the native posterior leaflet and mates with a native anterior leaflet to ensure a unidirectional flow of blood in the left atrium and the left ventricle; wherein, the artificial valve leaflet comprises a valve leaflet stent and a covering, and wherein the valve leaflet stent is a single-layer three-dimensional stent, and the covering covers the valve leaflet stent. The present invention utilizes the artificial valve leaflet for occupation and mating and effectively utilizes the healthy native anterior leaflet, thereby improving the valve leaflet's mating performance and lifespan. The artificial heart valve of the present invention has a compact structure and a small volume, and after implantation, it only occupies the area where the posterior leaflet is, which has little effect on the heart's function, and occupies a small area of the valve orifice, so the impact of blood flow is small, thereby improving the lifespan of the artificial heart valve.

Mitral valve prolapse and mitral regurgitation can be treating by implanting in the mitral annulus a transvalvular intraannular band. The band is positioned so that it extends transversely across a coaptive edge formed by the closure of the mitral valve leaflets, to inhibit prolapse into the left atrium. At least one marginal chordae is severed, to permit leaflet closure against the band.

The present invention relates to mitral valve repair and replacement devices and methods. An implant and method for repairing and / or replacing the function of a native mitral valve, in various embodiments, is configured to reduce or eliminate mitral regurgitation and residual mitral valve leakage. A coiled anchor with a central turn that reduces in size after implantation is used to approximate the native mitral annulus size and reshape the native mitral annulus to reduce valve leakage. A clip can be further applied to the native valve leaflets to reduce the size of the native mitral annulus and reduce leakage therethrough. An artificial heart valve can be implanted in the coiled anchor to replace and further improve the function of the valve. In some cases, an artificial valve can be implanted in the clipped valve, with the clip detached from one of the native valve leaflets to provide space for the artificial valve to expand.

Mitral valve prolapse and mitral regurgitation can be treating by implanting in the mitral annulus a transvalvular intraannular band. The band has a first end, a first anchoring portion located proximate the first end, a second end, a second anchoring portion located proximate the second end, and a central portion. The central portion is positioned so that it extends transversely across a coaptive edge formed by the closure of the mitral valve leaflets. The band may be implanted via translumenal access or via thoracotomy.

To solve a problem that occurs when blood flows around a valve on an outside of a prosthesis.SOLUTION: A mitral valve prosthesis includes an hourglass-shaped inner frame and a bulbous outer frame. A valve body having a plurality of leaflets is positioned within an interior region of the inner frame. The leaflets are shaped to substantially conform to an interior surface of the inner frame when the leaflets are in an open position. As a result, the gap between the leaflets and the inner frame is decreased, thereby reducing the likelihood of thrombus formation. Ventricular anchors are preferably provided along a distal end of the inner frame. The anchors extend proximally for placement behind native mitral valve leaflets. A fabric skirt may extend along an inner or outer surface of the outer frame. In preferred embodiments, the fabric skirt extends distally beyond a distal end of the outer frame and is adapted for forming a seal along the mitral valve annulus.SELECTED DRAWING: Figure 9

The application discloses a method and device for evaluating the risk of stroke related to atrial fibrillation and a storage medium, relates to the technical field of risk evaluation, and comprises the following steps: acquiring a cardiac image of a patient; acquiring a left atrial model according to the cardiac image, wherein the left atrial model comprises a left atrial body, a mitral annulus, a pulmonary vein atrium and a left atrial appendage; calculating blood flow parameters of the left atrium according to the left atrial model, wherein the blood flow parameters comprise at least one of particle residence time and blood shear rate; and evaluating a first risk index of stroke of the patient according to the blood flow parameters. The application solves the problem of weak prediction ability of risk evaluation in the prior art, achieves the effect of individualized prediction of the risk of stroke according to the cardiac image of the patient, and improves the prediction accuracy.

An implantable prosthetic posterior mitral valve is described where one variation generally includes a frame. A posterior leaflet having one or more scallops may be connected to the frame such that the scallops extend from the frame for coaptation against a native anterior leaflet when the frame is deployed. At least one arm member may be connected to the frame such that the arm member extends laterally in a curved configuration configured to approximate a curvature of a native mitral annulus when the frame is deployed, and an anchoring leg may be connected to the frame and extend in a superior direction from a posterior side of the frame and defines a capture region between the anchoring leg and the posterior side. The capture region may be sized to receive at least a portion of a native posterior leaflet in an elongated state when the frame is deployed.

Methods, systems, and computer readable media for utilizing a therapeutic ultrasound device to perform mitral valve decalcification are disclosed. One method includes acquiring, via an ultrasound imaging component, imaging data of a mitral valve in real-time, defining a therapeutic region of interest corresponding to the mitral valve, and utilizing, by a system controller engine, imaging data from the ultrasound imaging component to determine an interval period of minimal mitral annular movement. The method further includes defining a sequence of therapeutic targets within the region of interest of the mitral valve, utilizing the imaging data acquired in real-time by the ultrasound imaging component to provide a therapeutic ultrasound transducer array with a location and depth of an intra-annular focal zone within the mitral valve, and emitting a high intensity focused ultrasound (HIFU) pulse wave from the therapeutic ultrasound transducer array to each of the therapeutic targets of the mitral valve during the determined interval period and in accordance with the defined sequence.

Cardiac valve repair devices with annuloplasty features and associated systems and methods are disclosed herein. A cardiac valve repair device configured in accordance with embodiments of the present technology can include, for example, an atrial fixation member configured to engage tissue within a left atrium proximate to a native mitral valve and a spring mechanism coupled to an inferior edge portion of the atrial fixation member. The spring mechanism has an extended state with a first length corresponding to a dimension of the atrial fixation member in a deployed state and a relaxed state with a shorter length corresponding to a desired dimension of the native valve annulus. When implanted, the spring mechanism contracts the atrial fixation member such that the native mitral annulus anchored to the atrial fixation member reduces in a cross-sectional dimension.

Systems and methods are provided for positioning an intravascular device. A sensing device includes a plurality of nodes disposed on a distal portion of the sensing device. The distal portion of the sensing device is inserted into a circumflex artery. A plurality of node locations of the plurality of nodes are determined in a coordinate system when the distal portion of the sensing device is inserted into the circumflex artery. A projected plane of a mitral annulus is determined in the coordinate system based on the plurality of node locations. A projected deployment point for the intravascular device is determined in the coordinate system based on the plurality of node locations.

Annuloplasty rings that are size-adjustable after implant and which facilitate deployment and reduce long-term complications. The rings each have a hollow circumference with a cinching element extending therethrough whose length is controlled remotely via a deployment system handle. The ring may be anchored to the annulus and then the size adjusted while the heart beats and under visualization to minimize regurgitation. The cinching element may be a loop of metal which is clamped to size within a junction housing to which the deployment system attaches. The rings are especially beneficial for repairing the mitral annulus, and may be saddle shaped with the junction housing located on an anterior side.

The present application relates to the technical field of medical image analysis, in particular to a left ventricular compliance evaluation method and system based on medical images, comprising the following steps: obtaining three-dimensional coordinates of the left ventricular apex to the mitral annulus plane through CT images, calling a thin plate spline interpolation algorithm to establish a left ventricular long axis model, synchronously obtaining an end-diastolic diameter, inputting the left ventricular long axis model and the end-diastolic diameter into an Euclidean distance calculation function to generate a left ventricular long diameter ratio. In the present application, the left ventricular long axis model is constructed by integrating CT three-dimensional coordinates and ultrasound inner diameter, the long diameter ratio is calculated in combination with the Euclidean distance, the point cloud is registered and the myocardial wall area is segmented, the local deformation is quantified by using the Gaussian curvature gradient, the correction factor is input into the radial basis function network to generate, and the parameter coupling mechanism is established by fusing the aortic root angle, the dynamic model is established by optimizing the pressure-volume equation weight, and the quantitative evaluation system of spatial heterogeneity and time continuity is realized.

The present application relates to a multi-part replacement heart valve prosthesis. The replacement mitral valve prosthesis includes a support structure and a valve body having three flexible leaflets. The support structure preferably includes an inner valve frame and an outer sealing frame. The valve frame supports the flexible leaflets. The sealing frame is adapted to conform to the shape of a native mitral annulus. The sealing frame can be coupled to an inlet end of the valve frame, an outlet end of the valve frame, or both. A plurality of anchors are coupled to the outlet end of the valve frame. The anchors extend radially outward to be disposed behind native leaflets. The prosthesis preferably includes a skirt disposed along an exterior of the outer sealing frame. The prosthesis is collapsible for delivery into the heart by a delivery catheter. The prosthesis is configured to self-expand for deployment in the heart upon release from the delivery catheter.