22 results about "Cardiac chamber" patented technology

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.#

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 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.

This document describes implantable medical devices and methods of using such devices. The implantable medical devices include a cardiac lead sized for insertion in a cardiac cavity, the cardiac lead having a distal end and a proximal end and a lead body extending therebetween, a heat exchange module disposed at the distal end of the lead body, the heat exchange module comprising an enclosure having a first surface and a second surface, and one or more temperature sensors located within the enclosure.

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.

Systems and methods of automatically controlling, on a graphical user interface used by a physician, display views of an anatomic structure of a patient. Such systems and methods of automatically controlling display views of an anatomic structure of a patient can facilitate visualizing a position of a medical device relative to the anatomic structure during a medical procedure directed to the anatomic structure. In certain implementations, the systems and methods of the present disclosure provide automatic display views of a cardiac catheter relative to a three-dimensional model of a patient's heart cavity during a medical procedure such as cardiac ablation.

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.

Provided by the present disclosure are a boundary element-based three-dimensional mapping method, system and apparatus, as well as a device and a medium. The method includes the following steps: acquiring a three-dimensional endocardium model, electrode potential data collected by an electrode probe in a cardiac chamber, and position data of the electrode probe collected by a three-dimensional spatial positioning system; performing boundary element discretization processing of the endocardium using a normal vector in geometric vector data, the position data and a preset electrostatic relationship of an intracardiac potential to determine a numerical relationship equation after boundary element discretization; solving an endocardial potential by inverse operation based on the numerical relationship equation, the position data and the electrode potential data; and determining an endocardial charge density on the endocardium according to the endocardial potential data and a preset charge density algorithm, and displaying the endocardial charge density in real time.

This invention discloses a multifunctional non-contact three-dimensional cardiac electrophysiological mapping system based on intracardiac ultrasound (ICE), comprising an ICE system, an ultrasound host, an ECG signal acquisition system, and a three-dimensional spatial positioning system. By adjusting the position and imaging angle of the ICE probe, it continuously acquires cardiac ultrasound signals, as well as heartbeat and respiratory signals, to synchronously acquire ultrasound signals at different cardiac cycles. Cross-correlation calculations are performed on the continuous ultrasound signals acquired at various spatial locations to obtain the three-dimensional cardiac excitation conduction sequence and maximum amplitude distribution within a cardiac cycle. This system can perform both intracardiac ultrasound imaging and non-contact three-dimensional electrophysiological mapping, reducing the use of catheters and medical costs in traditional contact electrophysiological interventional procedures, simplifying surgical operations, and improving surgical safety. Furthermore, it can simultaneously map the endocardium, intramyocardium, and epicardium, enabling more precise surgical planning and possessing significant clinical value.

The present disclosure provides an analysis and processing method and system of intracardiac bubbles, a medical management platform and a medium. The analysis and processing method comprises: obtaining target intracardiac correlation data corresponding to a target cardiac cavity region; based on the target intracardiac correlation data, obtaining a target bubble risk level of bubbles in different bubble regions in the target cardiac cavity region; wherein the bubbles are associated with a preset ablation energy output event. The present disclosure automatically determines the bubble load index and the bubble risk level by using a bubble condition prediction model and / or a bubble detection and quantification algorithm, changes "seeing bubbles" into a calculable, comparable and objective index, constructs a complete safety monitoring system which can be standardized, tracked and used to guide energy strategy adjustment, can provide effective bubble risk assessment and safety control basis for ablation scene in time and accurately, realizes image-driven, standardized and tracked bubble safety management in the ablation scene, and meets higher actual processing requirements.

A method includes receiving an anatomical map of wall tissue of at least a portion of a cardiac chamber, the map comprising different anatomical regions. A plurality of ablation points generated by a multi-electrode catheter during an ablation instance can be received. Using a classification algorithm that considers catheter shape data, an anatomical region is identified and all of the ablation points can be classified as belonging to the identified anatomical region. Respective ablation tags can also be presented on the anatomical map according to the classified ablation points and catheter shape data.

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.

This application discloses a method for precise windowing and bonding of a cover film on a flexible circuit board used in cardiac ultrasound examination. The method includes the following steps: providing a flexible circuit board with pad areas; attaching a low-viscosity masking film to the pad areas; temporarily covering the uncured cover film using its adhesive layer; laser-cutting the cover film to create windows corresponding to the pads, with the cutting depth stopping at the surface of the masking film; partially peeling off the cover film to expose the masking film; removing the masking film to expose the pads; re-attaching the cover film to align the windows with the pads; and finally, thermo-curing for permanent bonding. This method protects the pads from laser damage by pre-attaching a low-viscosity masking film to them, while the temporary adhesion of the cover film facilitates partial peeling and realignment, followed by thermo-curing. It solves the problem of window misalignment caused by the flexible stretching of the cover film on long flexible circuit boards, avoids pad damage, leaves no adhesive residue after masking film peeling, and improves window alignment accuracy and yield.

An access device for a heart chamber, a removable hemostatic valve unit, and a system and a method of creating a transapical passage on a beating heart are disclosed. In examples, the access device (1) includes an apical base plate (100) and a sealing unit (3) 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 method includes receiving an anatomical map of wall tissue of at least portion of a cardiac chamber. Locations are received, of electrodes of a catheter inside the cardiac chamber during application of ablation. At least some of the locations of the electrodes are projected onto surface of the map. Shortest paths are found between pairs of projected locations of adjacent electrodes. Some of the paths are indicated with first indications representing continuous ablation, when paths have path lengths that are below a given threshold path length. Others of the paths are indicated with second indications representing ablation gaps based on catheter geometry. Grid ablation tags are generated according to first and second indications and ablation model. The grid ablation tags are superimposed over anatomical map to generate ablation map and are graphically encoded according to the first and second indications. The graphically encoded ablation map is presented to users.

A method includes receiving an anatomical mapping of the wall tissue of at least a portion of a heart chamber. During ablation, the positions of electrodes from a catheter within the heart chamber are received. At least some of the electrode positions are projected onto a surface of the mapping. The shortest path between pairs of projected positions of adjacent electrodes is found. When a path has a path length below a given threshold path length, some paths in the path are indicated using a first indication representing continuous ablation. Other paths in the path are indicated using a second indication representing an ablation gap based on catheter geometry. A grid ablation label is generated based on the first and second indications and an ablation model. The grid ablation label is overlaid on the anatomical mapping to generate an ablation mapping and is graphically encoded according to the first and second indications. The graphically encoded ablation mapping is presented to a user.

A data processing device system may be configured to cause display of a three-dimensional graphical representation of a first volume within a bodily cavity, cause the three-dimensional graphical representation to be annotated to include a graphical annotation set, and cause, at least in response to the annotation, the three-dimensional graphical representation to add an anatomical feature graphical representation. A data processing device system may be configured cause display of a particular graphical representation including a graphical representation of a particular volume within a cardiac cavity, cause the particular graphical representation to be annotated to include a graphical annotation set having a particular graphical attribute set, and cause, in response to a movement of a medical device, a changing of the particular graphical attribute set while the graphical annotation set graphically remains in correspondence with a same location in real-world three-dimensional space.

The application relates to a self-adaptive cardiac ultrasound blood flow imaging method and device. The method comprises the following steps: configuring to perform a plurality of times of cardiac ultrasound blood flow imaging operations, wherein each time of cardiac ultrasound blood flow imaging operation comprises sequentially performing a cardiac B mode imaging operation and a cardiac blood flow motion imaging operation; after the cardiac B mode imaging operation is performed, at least one frame of cardiac B mode ultrasound image is generated; based on an identified blood flow region of a heart chamber of interest, blood flow motion imaging emission sound field optimization is performed to generate blood flow motion imaging target emission parameters used when the cardiac blood flow motion imaging operation is performed; when the cardiac blood flow motion imaging operation is performed, blood flow echo signals are collected, and a frame of blood flow motion image is generated based on the collected blood flow echo signals. The application can improve the quality of cardiac ultrasound blood flow imaging and the accuracy of subsequent cardiac ultrasound blood flow imaging analysis, and widen the use range in the clinic.