44 results about "Heart.chambers" patented technology

A method for remodeling a heart chamber. A catheter system can be used to deliver implants to the heart chamber. A user can use a handle to adjust the tension of sutures between the implants to adjust the size of the heart chamber. The heart chamber can be remodeled at specific dimensions to address cardiomyopathy in a patient-specific manner.

A method for assisting a heart ventricle can comprise providing a longitudinally expandable member that is reversibly expandable along a longitudinal dimension, wherein the longitudinally expandable member can include adjacent abutting portions meeting at respective bends that form acute angles along the longitudinal dimension. The method can include securing a first end portion of the longitudinally expandable member to a first wall portion of the heart ventricle via a first anchor engagement feature associated with the first end portion. The method can include securing a second end portion of the longitudinally expandable member to a second wall portion of the heart ventricle via a second anchor engagement feature associated with the second end portion, the plurality of bends between the first and second end portions allowing augmenting expansion of the heart ventricle using spring force of the longitudinally expandable member to thereby improve heart function.

A collapsible and expandable prosthetic mitral valve stent is provided with improved recapture into a distal lumen of a delivery sheath. Various embodiments comprise a valve support within the interior of a stent frame and defining a flow channel therethrough, wherein the top or upstream of the valve support comprises a row, or a plurality, of stent cells that are bent radially inward at least partially over the flow channel. Some embodiments may comprise a recapture assist mechanism, such as an open paddle, attached to one or more of the inwardly bent stent cells and adapted to receive and / or engage a wire to aid in positioning, expansion, recapture and / or implanting the device in a patient's heart chamber.

A device for providing a passage between a first and second heart chamber is provided. The device includes a middle region having first and second ends, a lumen extending therethrough having a longitudinal axis, a first end region coupled to the first end, and a second end region coupled to the second end. The first end region may be delivered in the first heart chamber in a compressed state and transitioned to a deployed state, the first end region being deformable such that portions of the first end region are expandable to different angles relative to the longitudinal axis. The second end region may be delivered in the second heart chamber in a compressed state and transitioned to a deployed state therein, the second end region being deformable such that portions of the second end region are expandable to different angles relative to the longitudinal axis.

The invention provides a processing method and device based on a heart three-dimensional image, equipment and a medium. The processing method comprises the steps of obtaining three-dimensional image data of a heart; performing heart chamber segmentation according to the three-dimensional image data to obtain structure information of each area of the heart; determining the long axis of the left ventricle and the inner diameter and the outer diameter of the cardiac muscle according to the structural information; constructing a three-dimensional mapping of the myocardial wall thickness, and reflecting the form distribution of the myocardium in the space; segmenting the myocardium according to the three-dimensional mapping of the myocardial wall thickness and the long axis to generate segmented region data; and training and outputting a cardiomyopathy classification model through a pre-trained classification model in combination with the segmented region data. According to the method, feature vectors after dimension reduction are utilized to train a cardiomyopathy classification model. By generating a detection report containing an abnormal region position and classification confidence, the method improves the accuracy and efficiency of cardiomyopathy auxiliary detection by fusing image processing, feature extraction and machine learning technologies.

A collapsible and expandable prosthetic mitral valve stent is provided with improved recapture into a distal lumen of a delivery sheath. Various embodiments comprise a valve support within the interior of a stent frame and defining a flow channel therethrough, wherein the top or upstream of the valve support comprises a row, or a plurality, of stent cells that are bent radially inward at least partially over the flow channel. Some embodiments may comprise a recapture assist mechanism, such as an open paddle, attached to one or more of the inwardly bent stent cells and adapted to receive and / or engage a wire to aid in positioning, expansion, recapture and / or implanting the device in a patient's heart chamber.

The invention relates to a prosthetic heart valve (100) for an endoprosthesis (1) used in the treatment of a stenotic cardiac valve and / or a cardiac valve insufficiency. The prosthetic heart valve (100) comprises of a plurality of leaflets (102), which consist of a natural and / or synthetic material and have a first opened position for opening the heart chamber and a second closed position for closing the heart chamber, the leaflets (102) being able to switch between their first and second position in response to the blood flow through the heart. In addition, the prosthetic heart valve (100) comprises a leaflet support portion (103), consisting of biological and / or synthetic material for mounting of the prosthetic heart valve (100) to a stent (10), and a bendable transition area (104) which forms a junction between the leaflets (102) and the leaflet support portion (103), the transition area (104) progressing essentially in a U-shaped manner similar to a cusp shape of a natural aortic or pulmonary heart valve for reducing tissue stresses during opening and closing motion of the leaflets (102). The invention further relates to an endoprosthesis (1) comprising a prosthetic heart valve (100) and a stent (10).

The application discloses a heart chamber pressure regulating device, which is a cylindrical structure and comprises, in the axial direction of the cylindrical structure, an atrial septum passage and an outflow tract arranged in sequence along the blood flow direction; the side of the atrial septum passage, which is opposite to the outflow tract, is provided with an inflow port; a one-way open valve is arranged in the outflow tract; and the cylindrical structure is provided with a first positioning part and a second positioning part which are respectively arranged on the two sides of the atrial septum. The heart chamber pressure regulating device can form a one-way open valve structure on the atrial septum, is stable in position when cooperating with the atrial septum, can be recycled when the release position is improper, and can be released again.

The application discloses an ultrasonic probe capable of directly reaching into a heart chamber in a heart operation and relates to the technical field of medical devices. The ultrasonic probe comprises a fixing frame arranged around the heart chamber, the fixing frame being connected with the skin of a patient; a telescopic rod being perpendicular to the fixing frame and being connected with the fixing frame through a spherical hinge, the telescopic rod being capable of extending into the heart chamber of the patient; an ultrasonic probe being arranged on the side wall of the end of the telescopic rod away from the fixing frame, the ultrasonic probe being arranged in the circumference of the telescopic rod, and the ultrasonic probe being provided with a plurality of ultrasonic probes; and a camera being arranged at the end of the telescopic rod away from the fixing frame. The length of the ultrasonic probe extending into the heart chamber of the patient can be changed through the arrangement of the telescopic rod, and the different heart chambers of different patients can be detected. The ultrasonic probe can be fixed on the skin of the patient through the arrangement of the fixing frame. The telescopic rod can be rotated according to the different positions of the diseased parts of different patients through the spherical hinge connection between the fixing frame and the telescopic rod, so that the ultrasonic probe can be in a better detection position.

The invention discloses a method for measuring the pressure in the heart cavity of a mouse, and relates to the technical field of experimental animal medical detection, and the method comprises the following steps: cutting an incision of about 1cm in the neck of the mouse; placing two sutures below the common carotid artery, and ligating the common carotid artery by using the suture at the distal end; the other section of suture line is placed in the middle of the right common carotid artery, the carotid artery is lifted up, the blood filling condition is observed, an opening is formed in the blood vessel, a pressure volume catheter is inserted, and meanwhile the suture line at the telecentric end is slightly pulled backwards to prevent bleeding; the pressure volume catheter is inserted into the left ventricle through the right common carotid artery, and the left ventricle pressure maximum rising rate and the left ventricle pressure maximum falling rate are collected. By means of the carotid artery approach, serious trauma caused by thoracotomy can be prevented, and the cardiac physiology can be possibly affected by the operation. Therefore, the carotid artery approach is more suitable for a long-time pressure collection experiment.

The invention discloses a scalpel facilitating waste discharge, and relates to the field of medical instruments. The scalpel facilitating waste discharge comprises a scalpel holder, an outer scalpel assembly and an inner scalpel assembly. The outer cutter assembly comprises an outer cutter pipe, an inner cavity, a waste containing opening, a waste discharging opening and a water spraying module. The inner knife assembly comprises an inner knife tube, a driving module, a first communicating port and a second communicating port; the inner cutter pipe can shield the waste containing opening or be separated from the waste containing opening in the sliding stroke of the inner cutter pipe, and when the inner cutter pipe shields the waste containing opening, the second communicating opening communicates with the waste discharging opening. According to the scalpel, cut tissue chips can be directly discharged from the waste discharge port, the whole scalpel does not need to be taken out, the operation efficiency is improved, and secondary injury to a patient can be prevented; meanwhile, before the scalpel extends into the body of a patient, air in the inner cavity can be emptied through normal saline sprayed out of the water spraying module, and air blockage caused by the fact that the air enters the ventricle is effectively prevented.

The invention discloses a processing method and device based on a heart three-dimensional image, equipment and a medium. The method comprises the following steps: acquiring a heart three-dimensional image and a chamber segmentation result to obtain a left ventricular heart cavity and a cardiac muscle; according to the inner diameter and the outer diameter of the myocardial, constructing a three-dimensional inner diameter curved surface and generating myocardial wall thickness mapping; determining a pre-trained classification model and constructing two-channel input of the classification model; inputting the curved surface and the mapping into a first channel of a model, and combining whole heart segmentation or original image data of a second channel; and processing dual-channel input through the model, and outputting a cardiomyopathy classification result. According to the method, a complete spatial form is reserved through the three-dimensional inner diameter curved surface and wall thickness mapping, and precise and robust classification of various cardiomyopathy such as hypertrophic cardiomyopathy and dilated cardiomyopathy is realized by combining dual-channel feature fusion and interactive calibration of a space guidance mask; the problems of efficiently and accurately extracting features from a complex three-dimensional heart image and automatically identifying diseases are solved.

Systems and methods are provided for treating conditions such as heart failure and / or pulmonary hypertension by at least partially occluding flow through the superior vena cava for an interval spanning multiple cardiac cycles. A catheter with an occlusion device is provided along with a controller that actuates a drive mechanism to provide at least partial occlusion of the patient's superior vena cava, which reduces cardiac filling pressures, and induces a favorable shift in the patient's Frank-Starling curve towards healthy heart functionality and improved cardiac performance. The system may include sensors to determine the degree of occlusion of the superior vena cava. The occlusion system may be used to reduce volume in a heart and facilitate a cardiac procedure. The occlusion system may be used to relieve an overloaded chamber during and / or after deploying a VAD.

An access device for a heart chamber, a removable hemostatic valve unit, and a system including a cardiac assist unit are disclosed. In examples, the access device includes an apical base plate and a sealing unit configured to provide a separation of a wet zone from a heart chamber and a dry zone with a gaseous environment outside of said heart chamber inside a patient body at the same time.

An implantable assembly suitable for remodeling a chamber of a heart in a patient is disclosed. The assembly is implanted with a tool having a tool proximal portion and a distal portion. The assembly includes a mobile anchor including an abutment portion adapted to abut against a wall of the chamber of the heart and a tether portion rotatably coupled to the abutment portion. Each of the abutment portion and the tether portion are configured to be independently coupled from the tool. The assembly further includes an interventricular septum anchor for coupling to a septum of the heart and a tether having a working portion extending between the mobile anchor and the septum anchor having a first length and a tether proximal portion having a second length. The abutment portion is releasably locked to the tether portion and is configured such that a preselected torque applied to the tether portion of the mobile anchor unlocks and causes relative rotation of the tether portion relative to the abutment portion.

The invention relates to a method and system for identifying a conducted flow path in an anatomical map. A method includes receiving an anatomical map of wall tissue of at least a portion of a heart chamber, the map superimposed with an ablation tag. For at least some of the ablation tags, a non-conductive region is defined around each ablation tag to calculate a retardation region. Start and end point indicia of the potential conduction flow on the map are received from the user. Using a search algorithm, one or more possible conduction flow paths from the start point to the end point are searched, the one or more existing paths taking into account the retardation region. One or more flow paths found by the search algorithm are superimposed on the anatomical map. The superimposed anatomical map is presented to a user.

An ultrasound diagnostic apparatus includes processing circuitry and a display. The processing circuitry is configured to concurrently obtain a plurality of cardiac function indexes for at least two or more cardiac chambers including a left ventricle and a right ventricle among cardiac chambers appearing on an apical 4-chamber moving image of a subject during one or more heartbeats, based on boundary positions of the cardiac chambers appearing on the apical 4-chamber moving image. The display displays at least one or more of the plurality of cardiac function indexes.

A dual-chamber leadless pacemaker (LP) system includes a first leadless pacemaker (LP1) and a second leadless pacemaker (LP2), wherein LP1 is configured to be implanted in or on a first heart chamber and deliver pacing pulses to the first heart chamber, and LP2 is configured to be implanted in or on a second heart chamber and deliver pacing pulses to the second heart chamber. Information is obtained regarding the amplitude of the pacing pulses delivered by LP2 to the second heart chamber and / or the sensitivity of a sensing circuit of LP1, which is configured to be used by LP1 to detect the inherent depolarization of the first heart chamber. A crosstalk protection duration is determined based on at least some of this information, such that it is performed for an appropriate duration when crosstalk protection is executed.

The application discloses a kind of near-field coherent heart radio frequency sensing method and system based on code division multiple access, comprising: 4-way frequency f synchronous baseband signal is configured, 4-way synchronous chip is configured, synchronous baseband signal is multiplied with corresponding synchronous chip to modulate, and 4-way digital baseband signal is obtained;4-way digital baseband signal is handled to obtain 4-way heart measurement signal;4-way heart measurement signal is respectively transmitted to corresponding antenna by radio frequency transceiver and is emitted;The antenna is respectively arranged in left ventricle, left atrium, right ventricle, right atrium;Antenna receives reflected signal, and is recorded as heart sensing signal;Heart sensing signal is transmitted to radio frequency transceiver, and after processing, the baseband signal containing heart chamber beat information is obtained;The baseband signal containing heart chamber beat information is multiplied with corresponding synchronous chip to demodulate, band-pass filter, and the demodulation signal corresponding to heart chamber beat information is obtained respectively.

The present application relates to pericardiocentesis practice technical field, especially in an ultrasonic positioning guide pericardiocentesis practice model, including the ultrasonic wave can be penetrated bionic thoracic base;The heart simulation body is fixed in bionic thoracic base, and the heart simulation body is composed of simulated myocardial layer and the heart chamber placed in its inside and can be filled with liquid;The pericardial sac simulation body is wrapped outside the heart simulation body, and the pericardiocentesis simulation body includes an elastic wall layer film.The present application sets up effusion regulating device communicated with pericardial simulation cavity, and the filling amount of the sound transmission medium in pericardial simulation cavity can be infinitely adjusted by the push and pull of liquid storage injector, after the puncture needle completely breaks through pericardial sac simulation body, continue to needle to contact myocardial simulation film, and the second puncture is empty when the membrane is punctured, and the second puncture is empty when the membrane is punctured, and the second puncture is empty when the membrane is punctured, and the second puncture is empty when the membrane is punctured, and the second puncture is empty when the membrane is punctured, and the second puncture is empty when the membrane is punctured, and the second puncture is empty when the membrane is punctured, and the second puncture

The application aims to provide a blood circulation assisting system capable of generating pulsating blood flow and guaranteeing body functions, comprising a first blood circulation supporting unit located in a heart chamber of a patient and a second blood circulation supporting unit located in a descending aorta of the patient, the first blood circulation supporting unit pumping blood in the heart chamber to the aorta, and the second blood circulation supporting unit generating pulsating blood flow by periodically contracting and expanding to squeeze blood, and partially blocking the blood vessel when expanding. When the second blood circulation supporting unit periodically expands to squeeze blood, it does not completely block the blood vessel, but leaves a part of the blood flow passage, so as to allow part of the blood to pass through, prevent the ascending aorta pressure from suddenly rising, and prevent the blood from flowing back to the left ventricle, and also prevent the second blood circulation supporting unit from moving, so as to guarantee the pulsating effect and prevent unnecessary damage to the inner wall of the blood vessel.

The invention relates to a tool for sensing the depth of a catheter on a map. A system includes a display and a processor configured to receive an electroanatomical 3D map of a heart chamber to be projected and displayed on the display as a front view related to the view. The processor is further configured to: (i) receive position information of the catheter located within the heart chamber from the catheter positioning system, (ii) define a reference point position of the catheter displayed on the map, (iii) for any given viewing direction of the map, define the viewing direction as a ray superimposed on a vector from the virtual observer to the reference point position, and (iii) display the viewing direction on the virtual observer. (iv) calculating a view-dependent heart chamber distance between the distal wall position along the ray and the proximal wall position along the ray, (v) calculating a position of the reference point position on the ray relative to the heart chamber view-dependent distance based on the position information, and (vi) indicating the calculated reference point position distance to the user.

The invention relates to a hypertrophic myocardium excision device, belongs to the technical field of medical instruments, and aims to solve the problem that in the prior art, a tissue collection system is not integrated, so that excided tissue debris or myocardial tissue slice layers easily fall into a ventricle, and secondary injury is caused. The hypertrophic myocardial resection device comprises a resection gun body, a resection tube, a collecting mechanism and a driving mechanism, the resection tube, the collecting mechanism and the driving mechanism are all integrated on the resection gun body, and a doctor holds the resection gun body by hand and cooperates with a detection technology and a dynamic three-dimensional tissue mapping system to resection the hypertrophic myocardial. Precise adjustment of the stroke of the cutting tool bit is achieved by obtaining myocardial thickness data in real time, hypertrophic myocardium can be conveniently and rapidly cut, multiple cut diseased tissues can be independently collected, and later detection is facilitated.

The invention relates to a non-invasive differential diagnosis system for motor-induced myocardial remodeling and pathological cardiomyopathy. The non-invasive differential diagnosis system comprises an echocardiography detection device, an ECG electrode patch, a data export module and a data processing device. The ultrasonic cardiac detection equipment is used for synchronously collecting original image files of hemodynamic and myocardial strain in a cardiac cavity, blood flow vector imaging and two-dimensional myocardial tissue tracking data of the same DICOM file are obtained, and the original image files comprise images of at least three cardiac cycles of three sections of a left ventricle two-cavity heart, a left ventricle three-cavity heart and a left ventricle four-cavity heart; the ECG electrode patch is used for marking a cardiac cycle time phase in real time when an original image file is acquired; the data export module is used for transferring the original image file to the data processing equipment; and the data processing equipment is used for processing the original image file. The method can be used for accurately and efficiently identifying the sports myocardial remodeling and the pathological cardiomyopathy.

Embodiments of delivery systems, devices and methods for delivering a prosthetic heart valve device to a heart chamber for expanded implementation are disclosed. More specifically, methods, systems and devices are disclosed for delivering a self-expanding prosthetic mitral valve device to the left atrium, with no engagement of the left ventricle, the native mitral valve leaflets or the annular tissue downstream of the upper annular surface during delivery, and in some embodiments with no engagement of the ventricle, mitral valve leaflets and / or annular tissue located downstream of the upper annular surface by the delivered, positioned and expanded prosthetic mitral valve device.

An access device for a heart chamber, a removable hemostatic valve unit, and a system including a cardiac assist unit are disclosed. In examples, the access device) includes an apical base plate and a sealing unit configured to provide a separation of a wet zone from a heart chamber and a dry zone with a gaseous environment outside of said heart chamber inside a patient body at the same time.

A computer program and system are described that support identification of regions of the heart responsible for supporting or initiating abnormal heart rhythms. Electrode activation sequences contributing to a repetitive pattern of activation are identified. An earliest activating site, a vector of activation from the identified electrode activation sequences and a path back from the earliest activating site over a surface of the heart chamber are determined. A statistical measure is computed for the repetitive pattern of activation and data identifying the repetitive pattern of activation including the path is output, the data varying the prominence of the repetitive pattern of activation in dependence on the statistical measure.

Disclosed are an implantable blood circulation assist device, a control method therefor, and an implantation method therefor. The device comprises: a first cavity enclosed by a first housing; a second cavity enclosed by a second housing, wherein the first housing and the second housing have contractility and expansibility, the interior of the cavities are in communication, and both ends are open; a first valve at a first port of the first cavity; a second valve between a second port of the first cavity and a first port of the second cavity; a third valve at a second port of the second cavity, wherein the first valve to the third valve each comprise a valve ring and valve leaflets, the valve leaflets move relative to the valve ring, when closed, the ports of the cavities are obstructed, and when opened, the ports of the cavities are unobstructed; and a supporting and fixing structure used for fixing, supporting and communicating the components. The active opening and closing of the valves, as well as the sequential contraction and expansion of the first housing and the second housing, are controlled to achieve unidirectional flow of blood. The device can be implanted into large blood vessels and heart chambers without destroying the structural and functional integrity of the heart and blood cells, which distinguishes it from rotary pump artificial hearts.

The invention provides a self-adaptive rotating speed control method based on a current waveform and a heart blood pump, and relates to the technical field of heart blood pump control, and the method comprises the steps: S1, collecting the current value of the heart blood pump located in a heart chamber based on a preset sampling frequency, and connecting the continuously collected current values to draw a current oscillogram; s2, monitoring a current waveform on the current oscillogram, taking a preset time sampling window as a gradient on the current oscillogram, sequentially judging whether a current value in the time sampling window reaches a current reduction state / current stable state or not, and if yes, sending a corresponding first instruction / second instruction to the heart auxiliary pump; wherein the current value of the heart auxiliary pump is increased under the control of the first instruction, and the current value of the heart auxiliary pump is reduced under the control of the second instruction; the rotating speed of the heart blood pump in the current reduction state and the current stable state can be adjusted in a self-adaptive mode, and high energy consumption of the motor is avoided.