203 results about "Cardiac chamber" patented technology

Loading systems for prosthetic heart valve devices are disclosed. A loading funnel is provided within a watertight interior space that is at least partially filled or fillable with biocompatible fluid. Funnel may have a cylindrical end to which is connected a delivery catheter having a lumen that will receive the collapsed prosthetic heart valve device. An expanded prosthetic heart valve device may be placed within the funnel and pushed or pulled into the funnel which provides a predictable, reliable and repeatable surface for collapsing the prosthetic heart valve device. Ultimately the prosthetic heart valve device is collapsed and translated into the lumen of the delivery catheter for further translation therealong and release into the heart chamber of interest.

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 invention relates to an intelligent heart electrophysiological signal analysis and Jiangshi connecting line optimization system and method, and belongs to the technical field of electrocardio systems, the system comprises a plurality of modules for cooperative work, a data acquisition module is used for acquiring human body 12-lead electrocardiogram and intracardiac electrogram signals and executing a pace-making stimulation function; the signal preprocessing module filters received signals, the feature extraction module extracts time domain, frequency domain and nonlinear features, the deep learning module identifies abnormal heart rhythms by using a pre-training model, the parameter tuning module dynamically adjusts model parameters and optimizes and analyzes the parameters, and the Jiangshi connecting line optimization module improves signal quality. The intelligent monitoring module automatically monitors multiple indexes, the display interface module visually displays an electrocardiogram, the system compatible module is connected with multiple devices, and the control module coordinates all the modules to ensure efficient operation of the system.

Systems and methods for controlling blood pressure by controlling atrial pressure and atrial stretch are disclosed. In some embodiments, a stimulation circuit may be configured to deliver a stimulation pulse to at least one cardiac chamber of a heart of a patient, and at least one controller may be configured to execute delivery of one or more stimulation patterns of stimulation pulses to the at least one cardiac chamber, wherein at least one of the stimulation pulses stimulates the heart such that an atrial pressure resulting from atrial contraction of an atrium overlaps in time a passive pressure build-up of the atrium, such that an atrial pressure of the atrium resulting from the stimulation is a combination of the atrial pressure resulting from atrial contraction and the passive pressure build-up and is higher than an atrial pressure of the atrium would be without the stimulation, and such that the blood pressure of the patient is reduced.

Systems and methods for controlling blood pressure by controlling atrial pressure and atrial stretch are disclosed. In some embodiments, a stimulation circuit may be configured to deliver a stimulation pulse to at least one cardiac chamber of a heart of a patient, and at least one controller may be configured to execute delivery of one or more stimulation patterns of stimulation pulses to the at least one cardiac chamber, wherein at least one of the stimulation pulses stimulates the heart such that an atrial pressure resulting from atrial contraction of an atrium overlaps in time a passive pressure build-up of the atrium, such that an atrial pressure of the atrium resulting from the stimulation is a combination of the atrial pressure resulting from atrial contraction and the passive pressure build-up and is higher than an atrial pressure of the atrium would be without the stimulation, and such that the blood pressure of the patient is reduced.

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.

The invention discloses an irreversible electroporation damage assessment system and method based on myocardial dielectric properties, solves the problem of how to assess damage in a pulsed electric field ablation process, and belongs to the technical field of medical equipment. The system comprises an acquisition module and a workstation, wherein the acquisition module acquires an intracardiac ECG signal, a global electric field voltage signal of a target cardiac cavity, and impedance and temperature between ablation electrode pairs in real time; the work station processes the collected signals to obtain electrocardio characteristics, ablation parameters, temperature between the ablation electrode pairs, impedance drop, contact force and contact state between the ablation electrode pairs and myocardial tissue and ablation electrode position stability, the obtained signals are input into the evaluation model, and the evaluation model outputs IRE injury evaluation classification results. The evaluation model is realized based on a neural network. And real-time measurement and evaluation are carried out on PF ablation injury so as to assist a user to complete comprehensive, objective and accurate evaluation of the ablation effect.

The invention discloses a double-gas-path gas source system, a double-gas-path heart assisting system and a using method. 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.

The invention discloses a cardiac ultrasound image optimization enhancement method based on image filtering, and belongs to the technical field of cardiac ultrasound images. The invention discloses a cardiac ultrasound image optimization enhancement method based on image filtering. The method comprises the following steps: S1, obtaining a cardiac ultrasound binary image; s2, obtaining a to-be-processed cardiac ultrasound image; s3, highlighting the edge characteristics of the vascular wall and the myocardial tissue; s4, obtaining an enhanced cardiac ultrasound image; and S5, obtaining an optimized and enhanced cardiac ultrasound image. According to the method, the problem that the overall consistency judgment of structures such as heart chambers and valves is easily affected in the prior art is solved, the heart disease change area can be displayed more visually, misjudgment caused by noise or low contrast of medical staff is reduced, texture information of different levels can be effectively captured, the recognition capacity of a complex heart structure is enhanced, and the recognition efficiency is improved. Furthermore, the myocardial strain rate, the ventricular volume and other parameters are more accurately quantified, and a reliable basis is provided for evaluating the cardiac function.

Methods and systems for guiding interventional surgery are provided. The method includes receiving a plurality of intracardiac echocardiography (ICE) images of a target object acquired during a preset period, analyzing of the plurality of ICE images to obtain image analysis results, and generating an interventional surgical plan based on the image analysis results to guide the interventional surgery. This method conducts image analysis on ICE image before puncture to plan the interventional surgery, thus identifying the optimal puncture angle, depth, and timing for the interventional surgery. The method can help conduct real-time detection and tracking of the puncture process, identifying and mitigating potential risks during the surgical process to improve the success rate of the surgery. Furthermore, continuous assessment and management of possible complications can be carried out through postoperative evaluation to comprehensively reduce the risk of the interventional surgery and enhance its effectiveness and safety.

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 belongs to the technical field of pacemaker lead implantation, and provides an AI simulation guidance pacemaker lead implantation system, which comprises a data acquisition and preprocessing module for collecting and processing medical record comprehensive data of a patient through a multi-modal data fusion unit; according to the invention, the cardiac cavity structure of a patient can be accurately simulated and accurate anatomical information is provided for lead implantation through multi-modal data such as electrocardiogram, various imaging data and the like in combination with advanced image segmentation and registration algorithms, the AI simulation and prediction module plans an optimal path for a lead through a reinforcement learning algorithm, and the accuracy of lead implantation is improved. The method has important significance for searching coronary sinus ostii and selecting target veins, the stability of the lead and the success rate of implantation are ensured, the real-time guidance and feedback module can adjust the advancing direction and speed of the lead in real time in an operation, deviation caused by manual operation is reduced, and the operation efficiency is improved. And the postoperative evaluation and optimization module can perform quantitative analysis on the implantation effect and feed data back to the AI model, so that the system performance is further optimized.

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 invention belongs to the field of medical instruments, and particularly relates to a hollow mapping electrode assembly which comprises a guide wire, a mapping catheter and a locking device. The guide wire is hollow, and a guide wire is arranged in the hollow part of the guide wire; a guide wire far-end electrode ring is arranged on the far-end side wall of the guide wire, and a guide wire near-end electrode ring is arranged on the near-end side wall of the guide wire; a mapping far-end electrode ring is arranged on the far-end side wall of the mapping catheter, and a mapping near-end electrode ring is arranged on the near-end side wall of the mapping catheter; the locking device comprises a tube body, a soft ring and a cap. The guide wire and the mapping catheter are used in cooperation, the number of the electrodes can be increased according to the situation, and mapping data in a larger range can be collected; the distance between the guide wire far-end electrode ring and the mapping far-end electrode ring can be properly adjusted according to conditions; the adopted locking device can lock the guide wire and the mapping catheter, the guide wire and the mapping catheter are prevented from sliding relatively, the attaching stability of the electrode ring and the cardiac cavity tissue is improved, and the risks of falling off and shifting are reduced.

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.

An embodiment of the present invention provides a method, device, equipment and medium for evaluating cardiac function, which relates to the technical field of image processing. The method includes: obtaining multiple two-dimensional intracardiac ultrasound images of the heart to be evaluated, and annotating the three-dimensional spatial positions of the two-dimensional intracardiac ultrasound sectors for each two-dimensional intracardiac ultrasound image; segmenting the cardiac anatomical structures in each two-dimensional intracardiac ultrasound image according to the annotated three-dimensional spatial positions of the two-dimensional intracardiac ultrasound sectors; correcting the sizes of the corresponding cardiac tissue structures in the three-dimensional cardiac model according to the cardiac anatomical structures corresponding to the multiple two-dimensional intracardiac ultrasound images to obtain a corrected three-dimensional cardiac model; evaluating the function of the heart to be evaluated according to the relevant data of the corrected three-dimensional cardiac model. This solution can obtain a three-dimensional cardiac model with high precision by means of image annotation and model correction, and can accurately and conveniently obtain the three-dimensional cardiac model of the heart to be evaluated while reducing costs.

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.

The present invention discloses a biopsy forceps guiding catheter that can be used for zero-ray myocardial biopsy, comprising a catheter body, wherein a central cavity penetrating through both axial ends of the catheter body is provided inside the catheter body, at least one electrode element is provided at the first axial end of the catheter body, an airbag component is provided at the first axial end of the catheter body near the rear side of the electrode element, the electrode element is connected to an electrical connection assembly extending to the second axial end of the catheter body, the electrical connection assembly is connected to an electrocardiogram monitor, and the airbag component is connected to a ventilation assembly extending to the second axial end of the catheter body. The electrocardiogram and injury current in the cardiac cavity are recorded by the electrocardiogram monitor leads to select a site with a significant injury current for sampling, thereby reducing the influence of scars and fat tissue on the quality of the sampled sample, and the airbag component can drift and move with the blood, thereby solving the problem that the current biopsy forceps need to rely on X-ray guidance to be delivered into the ventricle and it is difficult to accurately obtain a specific layer of myocardium under the endocardium during sampling.

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.

An apparatus includes a processor configured for communication with an ultrasound transducer. The processor is configured to control the ultrasound transducer to obtain a first plurality of ultrasound images of a first heart valve of a heart chamber of a patient. The first plurality of ultrasound images may be a plurality of Doppler ultrasound frames. The processor is further configured to determine a first plurality of volume measurements of the heart chamber based on the first plurality of ultrasound images, wherein each volume measurement of the first plurality of volume measurements corresponds to an ultrasound image of the first plurality of ultrasound images. The processor is also configured to generate a pressure-volume (PV) loop of the heart chamber based on the first plurality of volume measurements without using a PV loop catheter and output the PV loop.

The present invention is entitled "Grading of Pacing-Induced Electrical Activation." In one embodiment, a medical procedure system includes: a probe for insertion into a cardiac chamber of a living subject and including a first electrode for applying a pacing pulse sequence at a location in the chamber; a second electrode for sensing an electrical activation signal in response to capturing electrical activation induced by the pacing pulse in myocardium of the chamber; a display; and processing circuitry for assessing successful acquisition of the induced electrical activation by the second electrode in response to the electrical activation signal, the successful acquisition indicating successful capture of the pacing pulse by the myocardium, calculating a capture grade in response to the assessment of successful acquisition of the induced electrical activation, the capture grade indicating a count of the induced electrical activations assessed as successfully acquired, and presenting the capture grade to the display.

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.