114 results about "Cardiac chamber" patented technology

The invention provides a four-dimensional cardiac function imaging method and device based on a biological magnetic signal. The method comprises the following steps: acquiring a magnetocardiogram signal of a to-be-detected object and dynamic structure information of a target trunk part in a full cardiac cycle; wherein the target trunk part at least comprises double lungs, a trunk, a heart cavity of the trunk and a pericardium structure, and the dynamic structure information comprises a contour structure and a multi-frame dynamic image; performing spatial registration on the dynamic structure information and the sensor for acquiring the magnetocardiogram signal to obtain coordinates of the sensor in a coordinate system of the dynamic structure information; according to the dynamic structure information, the coordinate of the sensor and the magnetocardiogram signal, calculating and reconstructing cardiac electrical excitation activity to obtain a calculation and reconstruction result; and converting the calculation reconstruction result into a four-dimensional visual image. According to the method, heart magnetic imaging and heart movement are combined, on the basis of obtained dynamic structure information and heart magnetic signals, the characteristics of biological magnetic signals are fully utilized, and the signal processing technology is integrated through space registration, so that accurate reconstruction of four-dimensional representation of the heart and visual display of functional activities are realized; therefore, the obtained four-dimensional visual image can completely represent the dynamic electrophysiological activities of the whole heart (including epicardium, endocardium and intrawall tissues) in a cardiac cycle, and a technical scheme with different concepts is provided for non-invasive imaging of cardiac electrical excitation activities.

The utility model discloses a double-gas-path gas source system and a double-gas-path heart auxiliary system. The double-air-path heart assisting system comprises a pressure generating mechanism which alternately generates positive pressure and negative pressure when working; the first auxiliary device comprises first driven equipment and a first piping pipeline, a pipe body at the farthest end of the first piping pipeline is provided with an inflow channel and an outflow channel, and the first driven equipment is located in the pipe body of the first piping pipeline and corresponds to the outflow channel in position; the second auxiliary device comprises second driven equipment and a second piping pipeline communicated with the second driven equipment; the pressure generating mechanism enables the second driven device to repeatedly expand and contract through the second piping. The detection device is used for acquiring the pressure in the cardiac chamber and the pressure in the aorta; and the control mechanism is used for controlling the pressure generation mechanism to respectively drive the first driven equipment and the second driven equipment according to the corresponding time sequence in a cycle control period according to the pressure signal sent by the detection device.

Provided in the present application are a biomagnetic signal-based four-dimensional cardiac function imaging method and device. The method comprises: acquiring a cardiac magnetic signal of a subject to be tested and dynamic structure information of a target torso part within a full cardiac cycle, wherein the target torso part at least comprises two lungs, a torso, and a heart chamber and a pericardium structure thereof, and the dynamic structure information comprises a contour structure and a plurality of frames of dynamic images; performing spatial registration on the dynamic structure information and a sensor acquiring the cardiac magnetic signal to obtain coordinates of the sensor in a coordinate system of the dynamic structure information; calculating and reconstructing a cardiac electrical excitation activity based on the dynamic structure information, the coordinates of the sensor, and the cardiac magnetic signal to obtain a calculation and reconstruction result; and converting the calculation and reconstruction result into a four-dimensional visualization image.

The invention relates to a flexible lockable rope-driven mechanical arm system for cardiac resection, which belongs to the technical field of minimally invasive interventional surgical instruments and comprises a flexible mechanical arm component, an end effector component, a near-end connecting seat and a locking component. The flexible mechanical arm assembly is formed by connecting a plurality of guiding discs and a plurality of locking pieces in series, the guiding discs are arranged at intervals, one locking piece is arranged every multiple guiding discs, and the guiding discs are connected with a driving rope in series through a length restraining rod. The near-end connecting base is used for being connected with a catheter sheathing canal or a mechanical arm driving base and providing an inlet for the length restraining rod and the multiple driving ropes. The end effector assembly is used for cardiac muscle resection; according to the flexible mechanical arm assembly, complex three-dimensional path planning in a narrow cardiac cavity and posture locking under a target posture can be achieved, and the positioning precision and posture stability in the myocardial resection process are improved. The end effector assembly includes a telescopic knife and a protective depth limiting structure that reduces the risk of penetrating the ventricular wall and damaging adjacent valves and conduction bundles.

The present invention is directed to a system for monitoring and evaluating electrogram signals representing electric activities of a heart chamber by computing the entropy of the electrogram signals, said system comprising a signal input that is connected to a mapping catheter comprising at least one electrode pole for picking up electric potentials and generating electrogram signals from the picked up electric potentials, along with the 3D location of the catheter at the time of recording and a signal processing and evaluation unit for processing and evaluating electrogram signals received at the signal input. The invention is further to a non-transitory computer readable medium for use in a system for monitoring and evaluating electrogram signals representing electric activities of a heart.

The invention discloses a balloon type heart cavity endoscope imaging system and method based on a three-dimensional mapping system, and belongs to the technical field of medical equipment. The problems that in an existing imaging method, imaging in the heart cavity is interfered by blood, the image definition is insufficient, and intuitive visualization of an inner wall image cannot be achieved are solved. A filling opening is formed in the handle end of the balloon type heart cavity endoscope, the filling opening is used for injecting liquid into a balloon so that the balloon can expand to be attached to the inner wall of a heart cavity to drain blood at the attached position of the inner wall of the heart cavity, and an image sensor is used for conducting image collection on the tissue, attached to the outside of the balloon, of the inner wall of the heart cavity; the positioning assembly is used for acquiring the position and posture of the image sensor in real time; the image processing unit is used for preprocessing the image acquired by the image sensor and then transmitting the image to the three-dimensional mapping system; the three-dimensional mapping system establishes a mapping heart cavity model, and the collected image and the mapping heart cavity model are matched, fused and displayed. The method is mainly used for intracardiac imaging.

A medical system including a receptacle device configured to hold an implantable medical device (IMD) within a receptacle volume. The receptacle device is supported by a delivery catheter configured to position the receptacle device within an anatomical volume of a patient, such as a heart chamber. The receptacle device includes a receptacle electrode configured to conduct a signal from an environment surrounding the receptacle device to the receptacle volume such that, for example, the signal may communicate to an electrode positioned within the receptacle volume. The signal may be an intrinsic cardiac electrical signal produced by the patient's heart. The electrode may be configured to communicate the signal to processing circuitry for evaluation (e.g., by a clinician) of the positioning and / or proximity of the IMD relative to a target site, a suitability of the target site, a deployment of the IMD, and / or for other reasons.

This application relates to a fully automated method and apparatus for quantitative analysis of myocardial acoustic contrast imaging. The method includes: acquiring myocardial acoustic contrast imaging images; segmenting the acquired myocardial acoustic contrast imaging images to obtain myocardial segmentation images; calculating the cardiac chamber area based on the myocardial segmentation images; automatically extracting the myocardial segmentation results at the end of cardiac systole using the periodic changes in cardiac chamber area; using the extracted end-systolic segmentation results as a mask to extract the corresponding position of each image as a target region for registration, thereby generating a one-to-one correspondence of registered image sequences; fitting a function model based on the pixel values ​​of each point in the registered image sequence; and generating a parametric image based on the registered image sequence and the fitted function model. Therefore, this application can perform fully automated quantitative analysis of myocardial acoustic contrast imaging.

The present invention addresses the problem of providing an ultrasound diagnostic device and a method for controlling the ultrasound diagnostic device, whereby it is possible to easily and accurately correct the contour line of a heart cavity. This ultrasound diagnostic device is provided with: a cardiac cavity extraction unit (25) that extracts a cardiac cavity from an ultrasound image obtained by imaging the heart of a subject; a correction likelihood estimation unit (26) that estimates the likelihood of correction for each portion of the contour line by analyzing the extracted contour line of the heart cavity; a control point specifying unit (27) that specifies a control point on the contour line on the basis of the estimated correction likelihood; an input device (32) for a user to perform an input operation; a correction operation reception unit (28) that receives a correction operation performed by a user on the specified control point via an input device (32); and a contour line correction unit (29) that corrects the contour line in accordance with the received correction operation.

The disclosure provides systems, methods, and non-transitory computer readable media for non-invasively assessing cardiac pressure and efficiency. An example computer implemented method includes: receiving patient-specific image data of a cardiac chamber of a patient, the patient-specific image data acquired from an imaging modality over a cardiac cycle; receiving patient-specific vitals data; deriving non-invasive cardiac parameters from the patient-specific image data and the patient-specific vitals data; applying the non-invasive cardiac parameters to a trained model to generate: a total energy output for blood flow out of the cardiac chamber during the cardiac cycle, and a total energy input for blood flow into the cardiac chamber during the cardiac cycle; and generating, in real time, based on a ratio of the total energy output to the total energy input, a patient-specific cardiac efficiency value for the cardiac chamber, the patient-specific cardiac efficiency value classifying a severity of a heart disease of the patient.

This application provides a basket catheter, which includes flexible circuit strips, an elastic support, basket electrodes, and a core rod. The flexible circuit strips are respectively arranged on the inner and outer surfaces of the elastic support, and multiple basket electrodes are disposed on the flexible circuit strips. The basket electrodes can be switched between a contracted state and an expanded state by operating the core rod. The basket electrodes on the inner surface of the elastic support are configured not to contact tissue. Accurate localization of key conduction areas through high-density sampling within the cardiac chambers allows for a clearer elucidation of the arrhythmia matrix, thereby providing better mapping and / or ablation results.

A system includes an interface and a processor. The interface is configured to receive multiple electrophysiological (EP) signals from a tissue area along an ablation curve inside a cardiac chamber of a heart of a patient. The processor is configured to (i) generate local conduction vectors (LCVs) for the area based on the multiple EP signals, (ii) estimate a level of change between sets of LCVs along the ablation curve within the tissue area, and (iii) based on the level of change, identify a presence of a conduction gap in the ablation curve.#

The invention provides a hypertrophy myocardial ablation device, which comprises a patch, and is characterized in that an electromagnetic coil is arranged in the patch and is used for generating an electromagnetic field; one end of the connecting piece is fixedly connected with the patch, and the other end of the connecting piece is provided with a hook-shaped structure; and the control assembly controls the intensity and the change frequency of the electromagnetic field generated by the electromagnetic coil. The device has the advantages that non-invasive controllable ablation of hypertrophy myocardium is achieved by integrating the electromagnetic coil, the connecting piece, the control assembly, the electrocardio collecting assembly and the intracardiac pressure collecting assembly, generation and change of an electromagnetic field are accurately controlled by collecting and analyzing heart data in real time, and high efficiency and safety of treatment are guaranteed.

Dual chamber leadless pacemaker systems comprising an aLP and a vLP, and methods for use therewith, are disclosed. Such systems and methods can detect and terminate pacemaker mediated tachycardia (PMT) even when the implant-to-implant (i2i) communication from the vLP to aLP (V2A) is compromised. The vLP monitors for PMT in response to reception of an i2i communication from the aLP indicating compromised V2A i2i communication and initiates, following detection of a PMT, initiate a PMT PV interval in response to reception of an i2i communication from the aLP indicating an atrial sensed event. The PMT PV interval is shorter than a PV interval that the vLP would otherwise use for ventricular pacing if PMT was not detected. The vLP also delivers a ventricular pacing pulse to the ventricular cardiac chamber in response to the PMT PV interval expiring without an intrinsic ventricular event being detected during the PMT PV interval.

The therapeutic catheter is part of a system that includes a local impedance indicator displayed on a screen. The local impedance indicator displays relative changes in impedance to the user to quickly convey information that helps the user better understand where the catheter is positioned within the cardiac chamber.

A method includes receiving a plurality of data points including electrical activation (EA) values measured at respective positions in at least a portion of a surface of a cardiac chamber of a heart of a patient. Using a predefined EA value criterion, the EA values in a given region of the cardiac surface are classified into multiple distinct EA wave-fronts, and multiple layers of EA values are calculated for the given region, wherein each EA layer includes the EA values found to belong to a respective and contiguous EA wave-front. The multiple EA layers are overlayed on a graphical representation of the surface. The graphical representation with the multiple overlaid EA layers is displayed to a user, with a graphical indication distinguishing between the multiple EA layers.

A method includes receiving an anatomical map of wall tissue of at least a portion of a cardiac chamber, the map superimposed with a grid of ablation tags that are graphically encoded according to respective levels of ablation of the wall tissue. Upon placing a multi-electrode ablation catheter in a vicinity of the wall tissue, one or more of the ablation tags are graphically re-encoded according to (i) existing levels of ablation associated with the tags and (ii) electrode proximity to wall tissue locations associated with the tags. The anatomical map, having the re-encoded ablation tags, is displated to a user.

A system and method for enhancing visual accuracy comprising a computer processor and memory that executes software to capture the 3D map of the heart images, heart valves, and electro-anatomic data of the heart chambers, and project it into a 3D monitor instead of a 2D monitor, where in the displayed 3D map of the heart images, heart valves, heart chambers anatomy and catheters, is still rendered as a 2D map, which then can be visualized as a real 3D images and map by using / wearing special glasses (3D glasses) designed to view the 3D map of the heart chambers and catheters as 3D in real time.

A method includes receiving a set of data points including positions and respective velocities of an activation wave in a tissue region of a cardiac chamber. The set is partitioned into at least two velocity clusters, each velocity cluster characterized by a respective velocity of the activation wave. One or more border curves are estimated, between the at least two clusters. The one or more border curves are indicated to a user as possible lines of block of the activation wave.

The invention relates to the technical field of intelligent medical instruments, and discloses a bipolar emission method and device for real-time three-dimensional intracardiac ultrasonic imaging. The method is applied to an intracardiac ultrasonic imaging catheter, and bipolar charging and discharging of an ultrasonic transducer array element, generation of symmetrical bipolar ultrasonic signals, elimination of direct-current components and improvement of image quality are achieved by controlling switching on and switching off of a positive high-voltage end switch and a negative high-voltage end switch. The device comprises a positive high-voltage end, a negative high-voltage end, a discharge loop switch and a control unit, is integrated in an ASIC (Application Specific Integrated Circuit) of an intracardiac ultrasonic imaging catheter, supports duty ratio dynamic adjustment, inverse emission and unipolar compatible modes, adapts to different scene requirements, and effectively improves the efficiency and accuracy of ultrasonic imaging.

A method includes receiving or generating an anatomical map of wall tissue of at least a portion of a cardiac chamber, the map superimposed with ablation tags at locations of ablated wall tissue. Upon placing an ablation catheter having one or more electrodes in a vicinity of the wall tissue, at least one electrode among the one or more electrodes is identified, that violates a location proximity criterion to one or more of the ablation tags. The identified at least one electrode is graphically encoded. The anatomical map showing the graphically encoded at least one electrode is displayed to a user.

At least some embodiments of the present disclosure are directed to a system for processing cardiac information. The system includes a processing unit configured to: receive one or more cardiac electrical signals from one or more electrodes disposed within a cardiac chamber, wherein the cardiac electrical signals are acquired during a cardiac beat; receive an indication of a measurement location corresponding to each of the cardiac electrical signals; analyze the one or more cardiac electrical signals to compute a plurality of duty cycle values, the computed duty cycle values corresponding to a plurality of preselected cycle length windows; and compute an average duty cycle value of the computed duty cycle values over the plurality of preselected cycle length windows.

Various embodiments of the present invention comprise a single-chamber collapsible and expandable prosthetic valve implant device with an elevated valve section and comprising the following capabilities: (1) preservation of native valve functionality; (2) initial preservation of native valve functionality with subsequent full replacement of native valve functionality; (3) full replacement of native valve functionality; and / or (4) mitigation of the prolapsing distance of the dysfunctional leaflets by preventing the anterior excursion of the prolapsing leaflets above the upper annular surface and into the left atrial chamber in order to preserve native leaflet functionality for as long as possible. The expanded and implanted device does not extend beyond the boundaries of the subject heart chamber, e.g., the left atrium, thereby enabling the preservation of any remaining native valve functionality with subsequent full replacement of native valve functionality if and when needed.

The utility model discloses a device for welding ICE heart cavity inner ultrasonic wire bundle and ground sheet, including the vertical setting base plate, the front of base plate is equipped with fixed part, and the one side of fixed part is movedly connected with base plate through a plurality of rolling components, and the upper end surface of fixed part is connected with the upper end surface of base plate through first connecting piece, and the one side of first connecting piece is fixed with base plate through stud, and the other side of first connecting piece is telescopic connection with fixed part through elastic component, and the one side of fixed part lower end surface is equipped with fixed block, and fixed block is connected with fixed part through second connecting piece, and the below of fixed block is connected with welding head, and the other side of fixed part lower end surface is equipped with limiting component, and the operating end of limiting component is abutted with the lower end surface of fixed block, and the problem that the deformation of fixed block is caused by the continuous heating during the process of welding heart cavity inner ultrasonic wire bundle, ground sheet and fixed sleeve, and then the quality of welding heart cavity inner ultrasonic wire bundle, ground sheet and fixed sleeve is influenced is solved.

A method and ultrasound imaging system includes generating a cine including a plurality of heart views based on cardiac ultrasound data, segmenting a plurality of heart chambers from each of the plurality of heart images, and automatically determining a heart chamber area for each of the plurality of heart chambers. The method and ultrasound imaging system includes displaying the cine on a display device and simultaneously displaying a plurality of single trace curves on the display device with the cine to provide feedback regarding acquisition quality of the cine, where each of the single trace curves represents the heart chamber area for a different one of the plurality of heart chambers over a plurality of cardiac cycles.

The application relates to a magnetic navigation guiding tearable sheath for heart conduction bundle pacing, which comprises a sheath body and a joint fixedly connected to the rear end of the sheath body, the sheath body comprises a front soft section and a rear fixed section, and the front soft section can be arbitrarily bent; a plurality of pairs of half-ring magnets are arranged on the outer surface of the front soft section close to the head end, two half-ring magnets in each pair of half-ring magnets are symmetrically arranged and form a ring, and a gap is left between the two half-ring magnets; three electrodes are arranged on the head end of the front soft section and are uniformly distributed in the circumferential direction, the three electrodes can be combined in any two, and three electrode pairs for intracardiac potential recording and positioning are formed; each electrode is connected with an electrode lead wire, and the rear end of the sheath body is provided with an electrode tail wire interface, and the other ends of the three electrode lead wires are fixedly arranged in the electrode tail wire interface. The application is beneficial to intracardiac potential recording and positioning, is convenient to contact with the heart cavity, stably adheres to the endocardium, and ensures that the pacing electrode is stably rotated out.

The invention relates to the technical field of atrial fibrillation, in particular to an atrial fibrillation rotor high-density analysis system and a control method. The atrial fibrillation rotor high-density analysis system comprises an embedded data acquisition system and an upper computer, and is characterized in that the embedded data acquisition system processes acquired data and uploads the processed data to the upper computer for analysis. Compared with the prior art, the atrial fibrillation rotor high-density analysis system and the control method provided by the invention are used for accurately mapping and recording electric signals in a cardiac cavity, deeply learning a special software algorithm through an AI loaded machine, and analyzing the atrial fibrillation rotor by adopting professional equipment and technologies; therefore, the obtained real-time electrocardiogram data extraction can evaluate direct information and indexes of ablation treatment sites for clinicians, and the treatment accuracy is improved.

A method includes receiving an anatomical map of wall tissue of at least a portion of a cardiac cavity, the map including different anatomical regions. A plurality of ablation points generated by a multi-electrode catheter during an ablation instance may be received. An anatomical region is identified using a classification algorithm that takes into account catheter shape data, and all ablation points are classified as belonging to the identified anatomical region. Corresponding ablation tags may also be presented on the anatomical map according to the classified ablation points and catheter shape data.

An ICE imaging system is disclosed, which comprises an Intracardiac echocardiography (ICE) catheter having a longitudinal axis, a proximal end, and a distal end. The ICE catheter corresponds to a micro-electromechanical (MEMS) or other transducer based phased array ultrasound catheter with an out diameter of 6 French or smaller for delivery through an internal jugular, subclavian, axillary, innominate venous system into heart chambers for the purpose of lead placement for a pacemaker or other implantable cardioverter defibrillator (ICD) device. Further, a catheter shaft houses an electronic flex cable which is in communication with at least one signal trace, and is configured to direct a plurality of transducer array elements to transmit and receive ultrasound beams, receive at least one signal from the plurality of transducer array elements, and construct at least one image of at least a portion of the heart based on the at least one signal.

A method incudes receiving multiple tags along an ablation curve that covers a partial circumference over an inner wall of a cardiac chamber of a heart of patient. Using the tags, the ablation curve is completed to a full circumference over the inner wall to eliminate a conduction gap in the ablation curve.