55 results about "Left cardiac chamber" patented technology

The embodiment of the invention relates to a processing method and device for predicting ejection fraction retention type heart failure. The method comprises the steps that a deep learning model used for conducting dichotomy prediction on the ejection fraction retention type heart failure is constructed and recorded as a first prediction model; constructing a model data set and recording the model data set as a first data set; training the first prediction model based on the first data set; after model training is finished, heart structure feature analysis, heart hemodynamic feature analysis and left ventricle vortex time sequence feature analysis are conducted on four-dimensional blood flow heart magnetic resonance imaging data input by a user to obtain a corresponding structure feature set, and the hemodynamic feature set and the vortex time sequence feature form a corresponding first feature data set; and inputting the first feature data set into a first prediction model for prediction to obtain a corresponding first classification vector which is fed back to the current user. According to the invention, the prediction accuracy and the prediction efficiency can be improved.

A magnetic driver generates a magnetic field that rotates about an axis and induces nutation in a disc with an array of magnets (wobble plate). The magnetic driver can be a drive disc with an array of magnets and rotated by a drive motor, or can be electromagnetic coils sequentially energized, to provide the rotating magnetic field. The wobble plate nutates about the axis of the rotating magnetic field but is constrained from rotating about the axis. The wobble plate can be enclosed in a pump housing where nutation of the wobble plate causes pumping of a fluid to occur, such as in an implanted Left Ventricular Assist Device (LVAD) or a Total Artificial Heart (TAH). Driven in reverse, an input pumping fluid may induce nutation of the wobble plate which in turn induces rotary motion of a drive disc that drives a generator or a motor / generator.

An embodiment of the invention provides a system for automatically deriving a parameter of a human heart from ultrasound results. A first neural network is arranged to receive a plurality of echocardiographic images and to classify the images into one of at least a two-chamber view and a four-chamber view. A second neural network is arranged to receive echocardiographic images comprising a two- or four-chamber view and to identify the endocardial border of the left ventricle (LV) for each view. End-systole and end-diastole images are then identified and a parameter such as LV volume, ejection fraction, global longitudinal strain and regional longitudinal strain is calculated.

An implantable LVAD is provided that includes a pump shaped so as to define a pump chamber. The pump includes a tubular linear motor, which includes a magnetic piston, which includes a reciprocating one-way valve configured to allow downstream blood flow and inhibit upstream blood flow; and a stator, which is configured to magnetically drive the magnetic piston with reciprocating motion, so as to pump blood downstream during downstream motion of the magnetic piston while the reciprocating one-way valve is closed. The pump further includes a spring, which is arranged to store energy during upstream motion of the magnetic piston and release the stored energy during the downstream motion of the magnetic piston. Control circuitry is configured to activate the tubular linear motor to provide pulsatile flow synchronized with cardiac cycles. Other configurations are also described.

An implantable LVAD system includes an implantable LVAD including an outflow cannula, which is couplable in fluid communication with a circulatory system of the patient at a first site; and an inflow cannula, which is couplable in fluid communication with the circulatory system at a second site upstream of the first site. The LVAD further includes a continuous-flow pump includes a first inlet in fluid communication with the inflow cannula, and a first outlet. The LVAD still further includes a pulsatile-flow pump includes a second inlet in fluid communication with the first outlet of the continuous-flow pump, and a second outlet in fluid communication with the outflow cannula. Control circuitry is configured to activate the continuous-flow pump to provide flow without synchronization with cardiac cycles of a heart of the patient, and activate the pulsatile-flow pump to provide pulsatile flow synchronized with the cardiac cycles. Other embodiments are also described.

1. Name of the design product: Drive control mechanism. 2. Use of the design product: It is used in a left ventricular assist device to achieve synchronous or relative rotation between the mandrel and the twisting shell. 3. Design key points of the design product: Lies in the shape. 4. Picture or photo that best shows the design key points: Perspective view.

The utility model discloses a ventricular simulation device and an extracorporeal circulation simulation system, the ventricular simulation device comprises a first simulation chamber and a second simulation chamber arranged in the first simulation chamber, and a first medium cavity is formed between the first simulation chamber and the second simulation chamber. The first simulation chamber is provided with a medium circulation opening communicated with the first medium cavity so as to change the medium pressure in the first medium cavity. A second medium cavity is formed in the second simulation chamber, and when the medium pressure in the first medium cavity is larger than the sum of the medium pressure in the second medium cavity and the minimum pressure needed by deformation of the second simulation chamber, the second simulation chamber shrinks and discharges the medium; and when the sum of the medium pressure in the first medium cavity and the minimum pressure required for deformation of the second simulation chamber is smaller than the medium pressure in the second medium cavity, the second simulation chamber expands, and the medium enters the second medium cavity. The contraction and relaxation of the second simulation chamber are realized by changing the compression state of the second simulation chamber, so that the contraction and relaxation of the left ventricle are accurately simulated, various heart failure states of a human body are accurately simulated, and the test is convenient.

In some instances, a computing device can determine information corresponding to a data structure and indicating delays associated with atrial leads, left ventricular (LV) leads, and right ventricular (RV) leads, based on one or more input variables. The computing device can determine multiple personalized characteristics based on the information corresponding to the data structure. The computing device can receive multiple second sets of electrical measurements from multiple measuring electrodes, based on the multiple personalized characteristics, indicating a second electrical signal applied to the patient's heart. The computing device can use a first set of electrical measurements (e.g., raw measurements) and the multiple second sets of electrical measurements to determine a cardiac resynchronization index (CRI) value. The computing device can generate a graphical representation based on the populated data structure and display the graphical representation.

The invention discloses a myocardial amyloidosis quantitative analysis method based on SPECT imaging and related equipment, and relates to the field of wisdom medical device.The method comprises the steps that firstly, three-dimensional SPECT original data of N time phases of a target patient in the cardiac cycle are collected, a mu graph is generated based on low-dose CT for registration and attenuation correction, and a dynamic image is reconstructed; and then an MR structure sequence under synchronous electrocardio gating is obtained, and SPECT and MR space standardization and partial volume effect correction processing are completed. And unifying the cardiac cycle image form through affine and nonlinear transformation, and generating a high-quality enhanced SPECT image. Finally, radioactive counting information is extracted on the basis of three-dimensional segmentation, multiple myocardial quantitative indexes are calculated, comprehensive analysis of myocardial functions is achieved in combination with left ventricular functional parameters, and accurate image support is provided for non-invasive diagnosis and curative effect evaluation of myocardial amyloidosis.

The application provides a cardiac phase judgment device, method, medium and electronic equipment. The device comprises: a medical image acquisition module, configured to acquire a plurality of three-dimensional medical images of a target object in at least one cardiac cycle; a myocardial wall thickness acquisition module, configured to acquire the thickness of a left ventricular myocardial wall in each frame of the three-dimensional medical images; and a cardiac phase judgment module, configured to acquire the cardiac phase of the target object according to the thickness of the left ventricular myocardial wall in each frame of the three-dimensional medical images. The cardiac phase judgment device only needs to acquire the cardiac phase of the target object according to the three-dimensional medical images of the target object, and is simpler to implement.

The invention discloses an ultrasonic image processing method. The method comprises the steps that a time-phase section recognition model is acquired; the time phase section recognition model comprises a left ventricle segmentation unit; inputting the cardiac ultrasound video into a time-phase section recognition model to trigger the time-phase section recognition model to obtain a heart standard section corresponding to at least one time phase based on the detected image features and the left ventricle segmentation result; processing the heart standard section under each time phase by using the image segmentation model to obtain a segmentation result; the segmentation result comprises point-line features of each target tissue in the heart standard section; and determining the detection result of the heart standard section in each time phase in parallel according to the point-line characteristics of each target tissue. By applying the technical scheme provided by the invention, the heart standard section can be measured more accurately and efficiently. The invention also discloses an ultrasonic image processing device, electronic equipment and a computer readable storage medium, which also have the above technical effects.

A magnetic driver generates a magnetic field that rotates about an axis and induces nutation in a disc with an array of magnets (wobble plate). The magnetic driver can be a drive disc with an array of magnets and rotated by a drive motor, or can be electromagnetic coils sequentially energized, to provide the rotating magnetic field. The wobble plate nutates about the axis of the rotating magnetic field but is constrained from rotating about the axis. The wobble plate can be enclosed in a pump housing where nutation of the wobble plate causes pumping of a fluid to occur, such as in an implanted Left Ventricular Assist Device (LVAD) or a Total Artificial Heart (TAH). Driven in reverse, an input pumping fluid may induce nutation of the wobble plate which in turn induces rotary motion of a drive disc that drives a generator or a motor / generator.

A method (100) for classifying a patient's diastolic function, comprising: (i) receiving (120), from an ultrasound device (280), a plurality of 2D echocardiographic images of the patient's heart; (ii) analyzing (150), by a trained diastolic function prediction algorithm, the plurality of 2D echocardiographic images of the patient's heart to estimate left ventricular end-diastolic pressure (LVEDP); (iii) classifying (160) the patient's diastolic function as normal or abnormal based on the estimated LVEDP; and (iv) providing (170), to a user via a user interface, an indication of the patient's diastolic function as normal or abnormal.

This invention discloses an automatic identification and classification method for scarred myocardium based on cine magnetic resonance imaging (CMRI) and deep learning. After preprocessing cardiac cMRI images, the method extracts the relative motion and imaging features of the left ventricular myocardium. A multimodal feature fusion network is then used for training and prediction to identify and classify five different types of scarred myocardium. The extraction of relative motion and imaging features enables an accurate and detailed description of the state of scarred myocardium. The multimodal feature fusion network model captures the compensatory effects of long-distance scarred myocardium movement, the non-rigid deformation motion patterns of the myocardium, and the spatiotemporal relationship between myocardial motion and morphology. This invention achieves high efficiency and accuracy in identifying and classifying scarred myocardium, saving doctors time and effort in diagnosing cardiovascular diseases leading to scarred myocardium, reducing patient suffering, and facilitating a more stable and simpler examination and diagnostic method.

Methods and systems for delivering cardiac pacing therapy, including sensing a cardiac signal via an electrode of an atrial lead, and determining the occurrence of one of an intrinsic atrial depolarization event and a paced atrial depolarization event for a current cardiac cycle in response to the sensed cardiac signal. In response to the determined occurrence of the depolarization event, delivering a first pacing therapy during the current cardiac cycle, and comparing the amplitude of the cardiac signal after the delivered first pacing therapy in the current cardiac cycle to a predetermined amplitude threshold. In response to the amplitude not being more negative than the predetermined amplitude threshold, delivering a second pacing therapy via a left ventricular lead in the same cardiac cycle and after the delivered first pacing therapy, and in response to the amplitude being more negative than the predetermined amplitude threshold, not delivering the second pacing therapy.

The invention discloses a cardiac ultrasound sternum-side short-axis section scanning method and device for an ultrasonic robot, and belongs to the technical field of medical ultrasonic robot control. The method comprises the following steps: S1, calculating the cardiac cycle phase of the heart; and S2, performing short-axis section scanning based on the left ventricle short-axis profile. The invention relates to an automatic scanning method for phase identification of composite complex motion combining short-axis scanning beside sternum with heartbeat cycle. The heart ultrasonic scanning is carried out through the method, and a heart section image which is good in repeatability, high in efficiency, stable in section quality and continuous in physical space can be obtained. The method is suitable for improving the imaging quality in the heart scanning process of the autonomous ultrasonic robot. The specific method of the ultrasonic robot in the field of short-axis section subdivision beside the heart is provided for the first time, and the method has good application prospects.

Patient monitoring for cardiophysiological function can include receiving an ultrasound waveform from a pulsed-wave ultrasound transducer array. The transducer array can be fixed externally on a patient to monitor a target vessel. Waveform fiducials can be identified from the ultrasound waveform indicating patient blood flow characteristics. Based on these fiducials, an ultrasound diagnostic indication of left ventricular ejection time (LVET) can be determined. A patient's cardiophysiological function can be assessed by combining the ultrasound diagnostic indication with bioimpedance cardiac waveform data.

The invention relates to a mitral valve outer valve frame, a mitral valve frame assembly and a heart valve prosthesis. The invention relates to a ventricular atrial cavity which has a radial contraction state and a radial expansion state and comprises an atrial part, a ventricular part and a connecting frame, the atrial part and the ventricular part are connected through the connecting part, and the atrial part and the ventricular part are of a latticed structure and comprise frame units; the ventricular part comprises at least three protruding parts which are distributed at intervals in the circumferential direction, an avoiding space is formed between every two adjacent protruding parts, the area of the avoiding space is gradually increased in the direction from the inflow end to the outflow end, and due to the fact that an avoiding area formed between every two adjacent supporting pieces has small influence on the ventricular autologous structure, the ventricular autologous structure can be effectively improved. The avoiding area is aligned with the left ventricular outflow tract during anchoring, so that the problem that the left ventricular outflow tract is blocked due to deformation after the mitral valve outer valve frame is implanted is solved.

The invention provides a novel model for diagnosis and prognosis of sepsis cardiomyopathy and a construction method thereof. The element TMAD in the new model has the advantages that the element TMAD does not depend on the high cardiac hypersonic image quality and is easy and convenient to operate, no radiation or side effect exists, and the ventricular function can be accurately and rapidly evaluated; compared with LVEF sensitivity, the method has the advantages that left ventricular systolic function changes can be reflected earlier, measurement repeatability is quite good, and the method is particularly suitable for patients with poor cardiac ultrasound image quality; as a relatively new ventricular strain measurement technology, the ventricular strain can be obtained through further analysis by system software, the operation and software image analysis steps are simple, the ventricular strain can be skillfully applied through certain clinical training, the environment is not polluted, the health of an operator is not influenced, and the patient acceptability is relatively high; the method has high feasibility in diagnosis of sepsis cardiomyopathy.

The invention belongs to the technical field of medical apparatus and instruments, and relates to a left ventricle auxiliary device of an electrocardio-light-operated switch, which comprises an electrocardio device, an infrared laser, a negative Poisson's ratio light actuator and a PLC (programmable logic controller). The negative Poisson's ratio optical actuator comprises a negative Poisson's ratio frame, a liquid crystal elastomer sleeve and an optical fiber. The electrocardiogram device and the infrared laser are connected with the PLC at the same time, the PLC obtains a current electrocardiogram of a monitored object in real time through the electrocardiogram device, every time a new group of P points, Q points, R points, S points and T points is obtained, the infrared laser is controlled to delay t1 starting after the moment corresponding to the S points of the group, and t2 time continues to be started. The specific light actuator is prepared and applied to the left ventricle auxiliary device, and the problems that traditional heart related devices are not matched in mechanical property, the driving mode is limited, blood contact complications are likely to be caused, other functions of the heart are affected, and individuation is lacked are solved.

An implantable medical device system and method for delivering cardiac resynchronization therapy (CRT) pacing includes: in response to delivered CRT pacing, determining that capture associated with the delivered CRT pacing is ineffective. Determining a cause of the ineffective capture, and if the determined cause of the ineffective capture is loss of capture, adjusting a safety margin; and if the determined cause of the ineffective capture is delayed left ventricular (LV) depolarization, adjusting LV pre-excitation. Monitoring changes in effective cardiac resynchronization therapy can be used to confirm that adjustments to the CRT pacing are effective in resolving the ineffective capture.

VfA cardiac therapy uses an implantable medical device or system. The implantable medical device includes a tissue-piercing electrode implanted in the basal and / or septal region of the left ventricular myocardium of the patient's heart from the triangle of Koch region of the right atrium through the right atrial endocardium and central fibrous body. The device may include a right atrial electrode, a right atrial motion detector, or both. The device may be implanted completely within the patient's heart or may use one or more leads to implant electrodes in the patient's heart. The device may be used to provide cardiac therapy, including single or multiple chamber pacing, atrioventricular synchronous pacing, asynchronous pacing, triggered pacing, cardiac resynchronization pacing, or tachycardia-related therapy. A separate medical device may be used to provide some functionality for cardiac therapy, such as sensing, pacing, or shock therapy.

A transcatheter septal myotomy device includes a shaft (120) including a first lumen and a channel formed in a sidewall thereof, and an electrosurgical wire (150) slidably disposed through the first lumen of the shaft. A distal end (154) of the electrosurgical wire is coupled to a distal end (126) of the shaft. The electrosurgical wire is configured to transform from a straightened configuration wherein the electrosurgical wire is within the first lumen and the channel to a deployed configuration wherein the electrosurgical wire is axially translated such that a distal portion of the electrosurgical wire extends out of the channel. The electrosurgical wire is configured to be energized to splay tissue of a heart.

An antibiotic wafer system to be used to reduce or eliminate post-operative infection in connection with implanting cardiac implantable electronic devices such as implantable defibrillators, permanent pacemakers, left ventricular assist devices. The wafers will be simpler and cheaper to manufacture than prior art pouches. The wafers will slowly deliver therapeutic antibiotic levels. Unlike prior systems which are only partially biodegradable, the wafer system is completely biodegradable and resorbable wafer mesh. The surgeon will find the post-operative wound closing easier because the wafer will occupy a reduced volume in the implantation pocket and around the implanted device.

Methods and systems are provided for identifying cardiac cycles for assessing left ventricular function using only image data. In one example, a method includes obtaining (402) a sequence of medical image frames of a heart of a patient over a plurality of cardiac cycles, where each medical image frame depicts a same cardiac apex view of the heart; using a timing model to generate (406) an output that can be used to mark each frame in the sequence by a cardiac cycle sub-phase; and using the output to determine (408, 504) the suitability of each cardiac cycle for performing the automatic measurement. The method may also include using the suitability for each cycle to determine whether an automatic measurement should be performed on each cycle, where the automatic measurement is performed (412) on a medical image frame corresponding to a suitable cycle and the automatic measurement is not performed on a medical image frame corresponding to an unsuitable cycle.

The present invention provides: a cardiac tissue model comprising cardiac tissue having at least one internal cavity or chamber wherein the cardiac tissue model comprises at least two different cardiac tissues selected from the group consisting of left ventricular tissue, right ventricular tissue, atrial tissue, outflow tract tissue, atrioventricular tube tissue, sinus node tissue and atrioventricular node tissue, wherein the central chamber may be common to at least two different cardiac tissues, and wherein the at least two different cardiac tissues comprise the ability to connect calcium signaling and / or propagate tissue contraction; methods of generating such tissue models, and uses of tissue models for screening purposes.

The invention discloses an unsupervised domain adaptive segmentation method and system for an echocardiogram based on anatomy guidance, and belongs to the field of medical image analysis. According to the method, the problems of low segmentation precision and poor robustness of an existing unsupervised domain adaptation method in an echocardiogram segmentation task are solved. An anatomical context alignment module is provided on the image level, and a source domain image is made to adapt to an anatomical context of a target domain through two strategies of left ventricle dominant clipping and four-cavity complete mirroring; a dissection affinity refining module is provided on the feature level, the dissection affinity relation between pixels is modeled in a combined mode through space affinity regularization and time sequence affinity refining, the fine dissection consistency of domain adaptation is enhanced, and noise interference is restrained. According to the method, the segmentation precision and the cross-domain generalization ability of the segmentation network can be remarkably improved by using the dissection-guided space-time affinity unsupervised domain adaptation framework, and the robustness of the segmentation network is improved. The method can be applied to echocardiogram segmentation.

A magnetic driver generates a magnetic field that rotates about an axis and induces nutation in a disc with an array of magnets (wobble plate). The magnetic driver can be a drive disc with an array of magnets and rotated by a drive motor, or can be electromagnetic coils sequentially energized, to provide the rotating magnetic field. The wobble plate nutates about the axis of the rotating magnetic field but is constrained from rotating about the axis. The wobble plate can be enclosed in a pump housing where nutation of the wobble plate causes pumping of a fluid to occur, such as in an implanted Left Ventricular Assist Device (LVAD) or a Total Artificial Heart (TAH). Driven in reverse, an input pumping fluid may induce nutation of the wobble plate which in turn induces rotary motion of a drive disc that drives a generator or a motor / generator.

Systems and methods are described herein for use in synchronizing electrical activity monitored by a plurality of external electrodes with supplemental cardiac data for use in evaluating a patient's cardiac condition and configuring cardiac therapy. The supplemental cardiac data may include one or more markers indicative of the occurrence of cardiac events and / or data representative of representative of at least one of cardiac electrical signals, cardiac sounds, cardiac pressures, blood flow, and an estimated instantaneous flow waveform provided by a left ventricular assist device.